51
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Yang DH, Chu YS, Okello OFN, Seo SY, Moon G, Kim KH, Jo MH, Shin D, Mizoguchi T, Yang S, Choi SY. Full automation of point defect detection in transition metal dichalcogenides through a dual mode deep learning algorithm. MATERIALS HORIZONS 2024; 11:747-757. [PMID: 37990857 DOI: 10.1039/d3mh01500a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2023]
Abstract
Point defects often appear in two-dimensional (2D) materials and are mostly correlated with physical phenomena. The direct visualisation of point defects, followed by statistical inspection, is the most promising way to harness structure-modulated 2D materials. Here, we introduce a deep learning-based platform to identify the point defects in 2H-MoTe2: synergy of unit cell detection and defect classification. These processes demonstrate that segmenting the detected hexagonal cell into two unit cells elaborately cropped the unit cells: further separating a unit cell input into the Te2/Mo column part remarkably increased the defect classification accuracies. The concentrations of identified point defects were 7.16 × 1020 cm2 of Te monovacancies, 4.38 × 1019 cm2 of Te divacancies and 1.46 × 1019 cm2 of Mo monovacancies generated during an exfoliation process for TEM sample-preparation. These revealed defects correspond to the n-type character mainly originating from Te monovacancies, statistically. Our deep learning-oriented platform combined with atomic structural imaging provides the most intuitive and precise way to analyse point defects and, consequently, insight into the defect-property correlation based on deep learning in 2D materials.
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Affiliation(s)
- Dong-Hwan Yang
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Pohang 37673, Republic of Korea.
- Center for van der Waals Quantum Solids, Institute of Basic Science (IBS), 77 Cheongam-Ro, Pohang 37673, Republic of Korea
| | - Yu-Seong Chu
- Division of Biomedical Engineering, College of Health Sciences, Yonsei University, 1, Yeonsedae-gil, Heungeop-myeon, Wonju-si, Gangwon-do, 26493, Republic of Korea
| | - Odongo Francis Ngome Okello
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Pohang 37673, Republic of Korea.
| | - Seung-Young Seo
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Pohang 37673, Republic of Korea.
| | - Gunho Moon
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Pohang 37673, Republic of Korea.
- Center for van der Waals Quantum Solids, Institute of Basic Science (IBS), 77 Cheongam-Ro, Pohang 37673, Republic of Korea
| | - Kwang Ho Kim
- Department of Materials Science and Engineering, Pusan National University (PNU), 2, Busandaehak-ro 63beon-gil, Geumjeong-gu, 46241, Busan, Republic of Korea
| | - Moon-Ho Jo
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Pohang 37673, Republic of Korea.
- Center for van der Waals Quantum Solids, Institute of Basic Science (IBS), 77 Cheongam-Ro, Pohang 37673, Republic of Korea
| | - Dongwon Shin
- Materials Science and Technology Division, Oak Ridge National Laboratory (ORNL), Oak Ridge, TN 37831, USA
| | - Teruyasu Mizoguchi
- Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro, Tokyo 15308505, Japan
| | - Sejung Yang
- Department of Precision Medicine, Yonsei University Wonju College of Medicine, 20, Ilsan-ro, Wonju-si, Gangwon-do, Republic of Korea.
| | - Si-Young Choi
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Pohang 37673, Republic of Korea.
- Center for van der Waals Quantum Solids, Institute of Basic Science (IBS), 77 Cheongam-Ro, Pohang 37673, Republic of Korea
- Department of Semiconductor Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Pohang, 37673, Republic of Korea
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52
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Muñoz J. Rational Design of Stimuli-Responsive Inorganic 2D Materials via Molecular Engineering: Toward Molecule-Programmable Nanoelectronics. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2305546. [PMID: 37906953 DOI: 10.1002/adma.202305546] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Revised: 10/10/2023] [Indexed: 11/02/2023]
Abstract
The ability of electronic devices to act as switches makes digital information processing possible. Succeeding graphene, emerging inorganic 2D materials (i2DMs) have been identified as alternative 2D materials to harbor a variety of active molecular components to move the current silicon-based semiconductor technology forward to a post-Moore era focused on molecule-based information processing components. In this regard, i2DMs benefits are not only for their prominent physiochemical properties (e.g., the existence of bandgap), but also for their high surface-to-volume ratio rich in reactive sites. Nonetheless, since this field is still in an early stage, having knowledge of both i) the different strategies for molecularly functionalizing the current library of i2DMs, and ii) the different types of active molecular components is a sine qua non condition for a rational design of stimuli-responsive i2DMs capable of performing logical operations at the molecular level. Consequently, this Review provides a comprehensive tutorial for covalently anchoring ad hoc molecular components-as active units triggered by different external inputs-onto pivotal i2DMs to assess their role in the expanding field of molecule-programmable nanoelectronics for electrically monitoring bistable molecular switches. Limitations, challenges, and future perspectives of this emerging field which crosses materials chemistry with computation are critically discussed.
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Affiliation(s)
- Jose Muñoz
- Departament de Química, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, Barcelona, 08193, Spain
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53
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Cao SH, Zhang T, Geng HY, Chen XR. The coexistence of high piezoelectricity and superior optical absorption in Janus Bi 2X 2Y (X = Te, Se; Y = Te, Se, S) monolayers. Phys Chem Chem Phys 2024; 26:4629-4642. [PMID: 38251770 DOI: 10.1039/d3cp05514k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2024]
Abstract
Bismuth chalcogenide and its derivatives have been attracting attention in various fields as semiconductors or topological insulators. Inspired by the high piezoelectric properties of Janus Bi2TeSeS monolayer and the excellent optical absorption properties of the Bi2X3 (X = Te, Se, S) monolayers, we theoretically predicted four new-type two-dimensional (2D) monolayers Janus Bi2X2Y (X = Te, Se; Y = Te, Se, S) using the first principles combined with density functional theory (DFT). The thermal, dynamic, and mechanical stabilities of Janus Bi2X2Y monolayers were confirmed based on ab initio molecular dynamics (AIMD) simulations, phonon dispersion, and elastic constants calculations. Their elastic properties, band structures, piezoelectric, and optical properties were systematically investigated. It was found that Janus Bi2X2Y monolayers have a typical Mexican hat-shaped valence band edge structure and, therefore, have a ring-shaped flat band edge, which results in their indirect band gaps. The results show that Janus Bi2X2Y monolayers are semiconductors with moderate band gaps (0.62-0.98 eV at the HSE + SOC level). After considering the electron-phonon renormalization (EPR), the band gaps are reduced by less than 5% at 0 K under the zero-point renormalization (ZPR) and further reduced by approximately 10% at 300 K. Besides, Janus Bi2X2Y monolayers also exhibit excellent optical absorption properties in the blue-UV light region, with the peak values at the order of 8 × 105 cm-1. Particularly, the Janus Bi2Te2S monolayer was found to exhibit a piezoelectric strain coefficient d11 of up to 20.30 pm V-1, which is higher than that of most of the 2D materials. Our results indicate that Janus Bi2X2Y monolayers could be promising candidates in solar cells, optical absorption, and optoelectronic devices; especially, a Janus Bi2Te2S monolayer can also be an excellent piezoelectric material with great prospects in the fields of mechanical and electrical energy conversion.
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Affiliation(s)
- Shu-Hao Cao
- College of Physics, Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610064, China.
| | - Tian Zhang
- College of Physics and Electronic Engineering, Sichuan Normal University, Chengdu 610066, China.
| | - Hua-Yun Geng
- National Key Laboratory for Shock Wave and Detonation Physics Research, Institute of Fluid Physics, CAEP, Mianyang 621900, China
| | - Xiang-Rong Chen
- College of Physics, Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610064, China.
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54
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Bahri M, Yu D, Zhang CY, Chen Z, Yang C, Douadji L, Qin P. Unleashing the potential of tungsten disulfide: Current trends in biosensing and nanomedicine applications. Heliyon 2024; 10:e24427. [PMID: 38293340 PMCID: PMC10826743 DOI: 10.1016/j.heliyon.2024.e24427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Revised: 12/18/2023] [Accepted: 01/09/2024] [Indexed: 02/01/2024] Open
Abstract
The discovery of graphene ignites a great deal of interest in the research and advancement of two-dimensional (2D) layered materials. Within it, semiconducting transition metal dichalcogenides (TMDCs) are highly regarded due to their exceptional electrical and optoelectronic properties. Tungsten disulfide (WS2) is a TMDC with intriguing properties, such as biocompatibility, tunable bandgap, and outstanding photoelectric characteristics. These features make it a potential candidate for chemical sensing, biosensing, and tumor therapy. Despite the numerous reviews on the synthesis and application of TMDCs in the biomedical field, no comprehensive study still summarizes and unifies the research trends of WS2 from synthesis to biomedical applications. Therefore, this review aims to present a complete and thorough analysis of the current research trends in WS2 across several biomedical domains, including biosensing and nanomedicine, covering antibacterial applications, tissue engineering, drug delivery, and anticancer treatments. Finally, this review also discusses the potential opportunities and obstacles associated with WS2 to deliver a new outlook for advancing its progress in biomedical research.
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Affiliation(s)
- Mohamed Bahri
- Center of Precision Medicine and Healthcare, Tsinghua-Berkeley Shenzhen Institute, Shenzhen, Guangdong Province, 518055, China
- Institute of Biopharmaceutical and Health Engineering, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
| | - Dongmei Yu
- School of Mechanical, Electrical & Information Engineering, Shandong University, Weihai, Shandong 264209, China
| | - Can Yang Zhang
- Center of Precision Medicine and Healthcare, Tsinghua-Berkeley Shenzhen Institute, Shenzhen, Guangdong Province, 518055, China
- Institute of Biopharmaceutical and Health Engineering, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
| | - Zhenglin Chen
- Center of Precision Medicine and Healthcare, Tsinghua-Berkeley Shenzhen Institute, Shenzhen, Guangdong Province, 518055, China
- Institute of Biopharmaceutical and Health Engineering, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
| | - Chengming Yang
- University of Science and Technology Hospital, Shenzhen, Guangdong Province, China
| | - Lyes Douadji
- Chongqing Institute of Green and Intelligent Technology Chinese Academy of Sciences, Chongqing City, China
| | - Peiwu Qin
- Center of Precision Medicine and Healthcare, Tsinghua-Berkeley Shenzhen Institute, Shenzhen, Guangdong Province, 518055, China
- Institute of Biopharmaceutical and Health Engineering, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
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55
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Milligan G, Yao ZF, Cordova DLM, Tong B, Arguilla MQ. Single Quasi-1D Chains of Sb 2Se 3 Encapsulated within Carbon Nanotubes. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2024; 36:730-741. [PMID: 38282683 PMCID: PMC10809716 DOI: 10.1021/acs.chemmater.3c02114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 12/27/2023] [Accepted: 12/28/2023] [Indexed: 01/30/2024]
Abstract
The realization of stable monolayers from 2D van der Waals (vdW) solids has fueled the search for exfoliable crystals with even lower dimensionalities. To this end, 1D and quasi-1D (q-1D) vdW crystals comprising weakly bound subnanometer-thick chains have been discovered and demonstrated to exhibit nascent physics in the bulk. Although established micromechanical and liquid-phase exfoliation methods have been applied to access single isolated chains from bulk crystals, interchain vdW interactions with nonequivalent strengths have greatly hindered the ability to achieve uniform single isolated chains. Here, we report that encapsulation of the model q-1D vdW crystal, Sb2Se3, within single-walled carbon nanotubes (CNTs) circumvents the relatively stronger c-axis vdW interactions between the chains and allows for the isolation of single chains with structural integrity. High-resolution transmission electron microscopy and selected area electron diffraction studies of the Sb2Se3@CNT heterostructure revealed that the structure of the [Sb4Se6]n chain is preserved, enabling us to systematically probe the size-dependent properties of Sb2Se3 from the bulk down to a single chain. We show that ensembles of the [Sb4Se6]n chains within CNTs display Raman confinement effects and an emergent band-like absorption onset around 600 nm, suggesting a strong blue shift of the near-infrared band gap of Sb2Se3 into the visible range upon encapsulation. First-principles density functional theory calculations further provided qualitative insight into the structures and interactions that could manifest in the Sb2Se3@CNT heterostructure. Spatial visualization of the calculated electron density difference map of the heterostructure indicated a minimal degree of electron donation from the host CNT to the guest [Sb4Se6]n chain. Altogether, this model system demonstrates that 1D and q-1D vdW crystals with strongly anisotropic vdW interactions can be precisely studied by encapsulation within CNTs with suitable diameters, thereby opening opportunities in understanding dimension-dependent properties of a plethora of emergent vdW solids at or approaching the subnanometer regime.
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Affiliation(s)
- Griffin
M. Milligan
- Department
of Chemistry, University of California Irvine, Irvine, California 92697, United States
| | - Ze-Fan Yao
- Department
of Chemistry, University of California Irvine, Irvine, California 92697, United States
- Department
of Chemical and Biomolecular Engineering, University of California Irvine, Irvine, California 92697, United States
| | | | - Baixin Tong
- Department
of Chemistry, University of California Irvine, Irvine, California 92697, United States
| | - Maxx Q. Arguilla
- Department
of Chemistry, University of California Irvine, Irvine, California 92697, United States
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56
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Nakamoto T, Matsuyama K, Sakai M, Chen CT, Cheuch YL, Mouri S, Yoshimura T, Fujimura N, Kiriya D. Selective Isolation of Mono- to Quadlayered 2D Materials via Sonication-Assisted Micromechanical Exfoliation. ACS NANO 2024; 18:2455-2463. [PMID: 38196098 DOI: 10.1021/acsnano.3c11099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2024]
Abstract
Mechanical exfoliation methods of two-dimensional materials have been an essential process for advanced devices and fundamental sciences. However, the exfoliation method usually generates various thick flakes, and a bunch of thick bulk flakes usually covers an entire substrate. Here, we developed a method to selectively isolate mono- to quadlayers of transition metal dichalcogenides (TMDCs) by sonication in organic solvents. The analysis reveals the importance of low interface energies between solvents and TMDCs, leading to the effective removal of bulk flakes under sonication. Importantly, a monolayer adjacent to bulk flakes shows cleavage at the interface, and the monolayer can be selectively isolated on the substrate. This approach can extend to preparing a monolayer device with crowded 17 electrode fingers surrounding the monolayer and for the measurement of electrostatic device performance.
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Affiliation(s)
- Tatsuya Nakamoto
- Department of Physics and Electronics, Osaka Metropolitan University, 1-1 Gakuen-cho, Naka-ku, Sakai-shi, Osaka 599-8531, Japan
- Department of Basic Science, Graduate School of Arts and Sciences, The University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153-8902, Japan
| | - Keigo Matsuyama
- Department of Physics and Electronics, Osaka Metropolitan University, 1-1 Gakuen-cho, Naka-ku, Sakai-shi, Osaka 599-8531, Japan
- Department of Basic Science, Graduate School of Arts and Sciences, The University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153-8902, Japan
| | - Masahiro Sakai
- Department of Basic Science, Graduate School of Arts and Sciences, The University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153-8902, Japan
| | - Chieh-Ting Chen
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Yu-Lun Cheuch
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Shinichiro Mouri
- College of Science and Engineering, Ritsumeikan University, Nojihigashi 1-1-1, Kusatsu, Shiga 525-8577, Japan
| | - Takeshi Yoshimura
- Department of Physics and Electronics, Osaka Metropolitan University, 1-1 Gakuen-cho, Naka-ku, Sakai-shi, Osaka 599-8531, Japan
| | - Norifumi Fujimura
- Department of Physics and Electronics, Osaka Metropolitan University, 1-1 Gakuen-cho, Naka-ku, Sakai-shi, Osaka 599-8531, Japan
| | - Daisuke Kiriya
- Department of Physics and Electronics, Osaka Metropolitan University, 1-1 Gakuen-cho, Naka-ku, Sakai-shi, Osaka 599-8531, Japan
- Department of Basic Science, Graduate School of Arts and Sciences, The University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153-8902, Japan
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57
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Xu C, Barden N, Alexeev EM, Wang X, Long R, Cadore AR, Paradisanos I, Ott AK, Soavi G, Tongay S, Cerullo G, Ferrari AC, Prezhdo OV, Loh ZH. Ultrafast Charge Transfer and Recombination Dynamics in Monolayer-Multilayer WSe 2 Junctions Revealed by Time-Resolved Photoemission Electron Microscopy. ACS NANO 2024; 18:1931-1947. [PMID: 38197410 DOI: 10.1021/acsnano.3c06473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2024]
Abstract
The ultrafast carrier dynamics of junctions between two chemically identical, but electronically distinct, transition metal dichalcogenides (TMDs) remains largely unknown. Here, we employ time-resolved photoemission electron microscopy (TR-PEEM) to probe the ultrafast carrier dynamics of a monolayer-to-multilayer (1L-ML) WSe2 junction. The TR-PEEM signals recorded for the individual components of the junction reveal the sub-ps carrier cooling dynamics of 1L- and 7L-WSe2, as well as few-ps exciton-exciton annihilation occurring on 1L-WSe2. We observe ultrafast interfacial hole (h) transfer from 1L- to 7L-WSe2 on an ∼0.2 ps time scale. The resultant excess h density in 7L-WSe2 decays by carrier recombination across the junction interface on an ∼100 ps time scale. Reminiscent of the behavior at a depletion region, the TR-PEEM image reveals the h density accumulation on the 7L-WSe2 interface, with a decay length ∼0.60 ± 0.17 μm. These charge transfer and recombination dynamics are in agreement with ab initio quantum dynamics. The computed orbital densities reveal that charge transfer occurs from the basal plane, which extends over both 1L and ML regions, to the upper plane localized on the ML region. This mode of charge transfer is distinctive to chemically homogeneous junctions of layered materials and constitutes an additional carrier deactivation pathway that should be considered in studies of 1L-TMDs found alongside their ML, a common occurrence in exfoliated samples.
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Affiliation(s)
- Ce Xu
- School of Chemistry, Chemical Engineering and Biotechnology, and School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Natalie Barden
- School of Chemistry, Chemical Engineering and Biotechnology, and School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Evgeny M Alexeev
- Cambridge Graphene Centre, University of Cambridge, Cambridge CB3 0FA, U.K
| | - Xiaoli Wang
- College of Chemistry, Key Laboratory of Theoretical and Computational Photochemistry, Beijing Normal University, Beijing 100875, People's Republic of China
| | - Run Long
- College of Chemistry, Key Laboratory of Theoretical and Computational Photochemistry, Beijing Normal University, Beijing 100875, People's Republic of China
| | - Alisson R Cadore
- Cambridge Graphene Centre, University of Cambridge, Cambridge CB3 0FA, U.K
| | | | - Anna K Ott
- Cambridge Graphene Centre, University of Cambridge, Cambridge CB3 0FA, U.K
| | - Giancarlo Soavi
- Cambridge Graphene Centre, University of Cambridge, Cambridge CB3 0FA, U.K
- Institute of Solid State Physics, Friedrich Schiller University Jena, Max-Wien-Platz 1, 07743 Jena, Germany
| | - Sefaattin Tongay
- School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, Arizona 85287, United States
| | - Giulio Cerullo
- Department of Physics, Politecnico di Milano, Piazza Leonardo da Vinci 32, I-20133 Milano, Italy
- IFN-CNR, Piazza Leonardo da Vinci 32, I-20133 Milano, Italy
| | - Andrea C Ferrari
- Cambridge Graphene Centre, University of Cambridge, Cambridge CB3 0FA, U.K
| | - Oleg V Prezhdo
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, United States
| | - Zhi-Heng Loh
- School of Chemistry, Chemical Engineering and Biotechnology, and School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
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58
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Cai J, Yang B, Akbarzadeh A. Origami Metamaterials Enable Low-Stress-Driven Giant Elastocaloric Effect. ACS NANO 2024; 18:894-908. [PMID: 38149799 DOI: 10.1021/acsnano.3c09516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2023]
Abstract
Elastocaloric materials, capable of achieving reversible thermal changes in response to a uniaxial stress, have attracted considerable attention for applications in advanced thermal management technologies, owing to their environmental friendliness and economic benefits. However, most elastocaloric materials operating on the basis of first/second-order phase transition often exhibit a limited caloric response, field hysteresis, and restricted working temperature ranges. This study resorts to origami engineering for realizing multifunctional metamaterials with exceptional elastocaloric effects at both nano (exemplified by computational simulations for graphene) and meso (demonstrated by experimentation on thermoplastic polyurethane elastomers) scales. The findings uncover that the graphene origami exhibits low-stress-driven reversible and giant elastocaloric effects without a hysteresis loss and with a high elastocaloric strength. These effects are achieved across a wide working temperature range (100-600 K) and are tailorable by fine-tuning the topological parameters and configurational status of the origami metamaterials. We demonstrate the scalability of the origami design strategy for magnifying the elastocaloric effect by the 3D printing of a mesoscale origami-inspired thermoplastic polyurethane metastructure that showcases enhanced elastocaloric performance at room temperature. This study presents the potential for the realization of architected elastocaloric materials through surface functionalization and origami engineering. The findings impart exciting prospects of elastocaloric origami metamaterials as the next generation of multiscale and sustainable thermal management technologies.
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Affiliation(s)
- Jun Cai
- Department of Bioresource Engineering, McGill University, Montreal, Québec H9X 3V9, Canada
| | - Bin Yang
- Department of Bioresource Engineering, McGill University, Montreal, Québec H9X 3V9, Canada
| | - Abdolhamid Akbarzadeh
- Department of Bioresource Engineering, McGill University, Montreal, Québec H9X 3V9, Canada
- Department of Mechanical Engineering, McGill University, Montreal, Québec H9A 0C3, Canada
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59
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Tufail S, Sherwani MA, Shamim Z, Abdullah, Goh KW, Alomary MN, Ansari MA, Almosa AA, Ming LC, Abdullah ADI, Khan FB, Menhali AA, Mirza S, Ayoub MA. 2D nanostructures: Potential in diagnosis and treatment of Alzheimer's disease. Biomed Pharmacother 2024; 170:116070. [PMID: 38163396 DOI: 10.1016/j.biopha.2023.116070] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Revised: 12/06/2023] [Accepted: 12/21/2023] [Indexed: 01/03/2024] Open
Abstract
Two-dimensional (2D) nanomaterials have garnered enormous attention seemingly due to their unusual architecture and properties. Graphene and graphene oxide based 2D nanomaterials remained the most sought after for several years but the quest to design superior 2D nanomaterials which can find wider application gave rise to development of non-graphene 2D materials as well. Consequently, in addition to graphene based 2D nanomaterials, 2D nanostructures designed using macromolecules (such as DNAs, proteins, peptides and peptoids), transition metal dichalcogenides, transition-metal carbides and/or nitrides (MXene), black phosphorous, chitosan, hexagonal boron nitrides, and graphitic carbon nitride, and covalent organic frameworks have been developed. Interestingly, these 2D nanomaterials have found applications in diagnosis and treatment of various diseases including Alzheimer's disease (AD). Although AD is one of the most debilitating neurodegenerative conditions across the globe; unfortunately, there remains a paucity of effective diagnostic and/or therapeutic intervention for it till date. In this scenario, nanomaterial-based biosensors, or therapeutics especially 2D nanostructures are emerging to be promising in this regard. This review summarizes the diagnostic and therapeutic platforms developed for AD using 2D nanostructures. Collectively, it is worth mentioning that these 2D nanomaterials would seemingly provide an alternative and intriguing platform for biomedical interventions.
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Affiliation(s)
- Saba Tufail
- Department of Genetics, University of Alabama at Birmingham, Birmingham, AL, USA.
| | | | - Zahid Shamim
- Department of Electrical Engineering, Faculty of Engineering and Technology, Aligarh Muslim University, Aligarh, India
| | - Abdullah
- Department of Pharmacy, University of Malakand, Khyber Pakhtunkhwa, Pakistan
| | - Khang Wen Goh
- Faculty Data Science and Information Technology, INTI International University, Nilai, Malaysia
| | - Mohammad N Alomary
- Advanced Diagnostic and Therapeutic Institute, King Abdulaziz City for Science and Technology, Riyadh, Saudi Arabia
| | - Mohammad Azam Ansari
- Department of Epidemic Disease Research, Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia.
| | - Abdulaziz Abdullah Almosa
- Wellness and Preventive Medicine Institute, King AbdulAziz City of Science and Technology, Riyadh, Saudi Arabia.
| | - Long Chiau Ming
- Department of Medical Sciences, School of Medical and Life Sciences, Sunway University, Sunway City, Malaysia.
| | - Amar Daud Iskandar Abdullah
- Department of Biological Sciences, School of Medical and Life Sciences, Sunway University, Sunway City, Malaysia.
| | - Farheen Badrealam Khan
- Department of Biology, College of Science, United Arab Emirates University, Al Ain, United Arab Emirates; Department of Biological Sciences, College of Medicine and Health Sciences, Khalifa University, PO Box 127788, Abu Dhabi, United Arab Emirates.
| | - Asma Al Menhali
- Department of Biology, College of Science, United Arab Emirates University, Al Ain, United Arab Emirates.
| | - Sameer Mirza
- Department of Chemistry, College of Science, United Arab Emirates University, Al Ain, United Arab Emirates.
| | - Mohammed Akli Ayoub
- Department of Biological Sciences, College of Medicine and Health Sciences, Khalifa University, PO Box 127788, Abu Dhabi, United Arab Emirates.
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60
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You B, Xu Z, Yang J, Jiang X, Li Y, Shao G, Jin Y, Xiang H, Jiang H, Liu X, Sun J, Feng Y, Jiang Y, Pan A, Liu S. Interlayer Coupling in Anisotropic/Isotropic Van der Waals Heterostructures of ReS 2 and WS 2. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2304010. [PMID: 37726234 DOI: 10.1002/smll.202304010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Revised: 09/05/2023] [Indexed: 09/21/2023]
Abstract
Van der Waals (vdW) heterostructures are composed of atomically thin layers assembled through weak (vdW) force, which have opened a new era for integrating materials with distinct properties and specific applications. However, few studies have focused on whether and how anisotropic materials affect heterostructure system. The study introduces anisotropic and isotropic materials in a heterojunction system to change the in-plane symmetry, offering a new degree of freedom for modulating its properties. The sample is fabricated by manually stacking ReS2 and WS2 flakes prepared by mechanical exfoliation. Raman spectra and photoluminescence measurements confirm the formation of an effective heterojunction, indicating interlayer coupling of the system. The anisotropy and asymmetry of the WS2 -ReS2 heterostructure system can be adjusted by the introduction of isotropic WS2 and anisotropic ReS2 , which can be proved by the change of the polarized Raman pattern. In the transient absorption measurement, the transient absorption spectra of WS2 -ReS2 heterostructure are red-shifted compared to those of WS2 monolayer, and the charge transfer is observed in the heterostructure. These results show the potential of anisotropic 2D materials in anisotropy modulation of heterostructures, which may promote future electronic or photonic application.
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Affiliation(s)
- Bingying You
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
- Photonics Research Group, Ghent University-imec, Ghent, 9000, Belgium
| | - Zheyuan Xu
- Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan Institute of Optoelectronic Integration, College of Materials Science and Engineering, Hunan University, Changsha, 410082, P. R. China
| | - Junqiang Yang
- School of Physics and Electronics, Central South University, Changsha, 410083, P. R. China
| | - Xingxing Jiang
- School of Physics and Electronics, Hunan University, Changsha, 410082, P. R. China
| | - Yanfang Li
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
| | - Gonglei Shao
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
| | - Yuanyuan Jin
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
| | - Haiyan Xiang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
| | - Huili Jiang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
| | - Xiaochi Liu
- School of Physics and Electronics, Central South University, Changsha, 410083, P. R. China
| | - Jian Sun
- School of Physics and Electronics, Central South University, Changsha, 410083, P. R. China
| | - Yexing Feng
- School of Physics and Electronics, Hunan University, Changsha, 410082, P. R. China
| | - Ying Jiang
- School of Physics and Electronics, Hunan University, Changsha, 410082, P. R. China
| | - Anlian Pan
- Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan Institute of Optoelectronic Integration, College of Materials Science and Engineering, Hunan University, Changsha, 410082, P. R. China
| | - Song Liu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
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61
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Ouyang B, Wei D, Wu B, Yan L, Gang H, Cao Y, Chen P, Zhang T, Wang H. In the View of Electrons Transfer and Energy Conversion: The Antimicrobial Activity and Cytotoxicity of Metal-Based Nanomaterials and Their Applications. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2303153. [PMID: 37721195 DOI: 10.1002/smll.202303153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Revised: 08/28/2023] [Indexed: 09/19/2023]
Abstract
The global pandemic and excessive use of antibiotics have raised concerns about environmental health, and efforts are being made to develop alternative bactericidal agents for disinfection. Metal-based nanomaterials and their derivatives have emerged as promising candidates for antibacterial agents due to their broad-spectrum antibacterial activity, environmental friendliness, and excellent biocompatibility. However, the reported antibacterial mechanisms of these materials are complex and lack a comprehensive understanding from a coherent perspective. To address this issue, a new perspective is proposed in this review to demonstrate the toxic mechanisms and antibacterial activities of metal-based nanomaterials in terms of energy conversion and electron transfer. First, the antimicrobial mechanisms of different metal-based nanomaterials are discussed, and advanced research progresses are summarized. Then, the biological intelligence applications of these materials, such as biomedical implants, stimuli-responsive electronic devices, and biological monitoring, are concluded based on trappable electrical signals from electron transfer. Finally, current improvement strategies, future challenges, and possible resolutions are outlined to provide new insights into understanding the antimicrobial behaviors of metal-based materials and offer valuable inspiration and instructional suggestions for building future intelligent environmental health.
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Affiliation(s)
- Baixue Ouyang
- School of Metallurgy and Environment, Central South University, Changsha, 410083, P. R. China
| | - Dun Wei
- School of Metallurgy and Environment, Central South University, Changsha, 410083, P. R. China
| | - Bichao Wu
- School of Metallurgy and Environment, Central South University, Changsha, 410083, P. R. China
| | - Lvji Yan
- School of Metallurgy and Environment, Central South University, Changsha, 410083, P. R. China
| | - Haiying Gang
- School of Metallurgy and Environment, Central South University, Changsha, 410083, P. R. China
| | - Yiyun Cao
- School of Metallurgy and Environment, Central South University, Changsha, 410083, P. R. China
| | - Peng Chen
- School of Metallurgy and Environment, Central South University, Changsha, 410083, P. R. China
| | - Tingzheng Zhang
- School of Metallurgy and Environment, Central South University, Changsha, 410083, P. R. China
| | - Haiying Wang
- School of Metallurgy and Environment, Central South University, Changsha, 410083, P. R. China
- School of Metallurgy and Environment and Chinese National Engineering Research Center for Control and Treatment of Heavy Metal Pollution, Central South, University, Changsha, 410083, China
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62
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Sovizi S, Angizi S, Ahmad Alem SA, Goodarzi R, Taji Boyuk MRR, Ghanbari H, Szoszkiewicz R, Simchi A, Kruse P. Plasma Processing and Treatment of 2D Transition Metal Dichalcogenides: Tuning Properties and Defect Engineering. Chem Rev 2023; 123:13869-13951. [PMID: 38048483 PMCID: PMC10756211 DOI: 10.1021/acs.chemrev.3c00147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 08/31/2023] [Accepted: 11/09/2023] [Indexed: 12/06/2023]
Abstract
Two-dimensional transition metal dichalcogenides (TMDs) offer fascinating opportunities for fundamental nanoscale science and various technological applications. They are a promising platform for next generation optoelectronics and energy harvesting devices due to their exceptional characteristics at the nanoscale, such as tunable bandgap and strong light-matter interactions. The performance of TMD-based devices is mainly governed by the structure, composition, size, defects, and the state of their interfaces. Many properties of TMDs are influenced by the method of synthesis so numerous studies have focused on processing high-quality TMDs with controlled physicochemical properties. Plasma-based methods are cost-effective, well controllable, and scalable techniques that have recently attracted researchers' interest in the synthesis and modification of 2D TMDs. TMDs' reactivity toward plasma offers numerous opportunities to modify the surface of TMDs, including functionalization, defect engineering, doping, oxidation, phase engineering, etching, healing, morphological changes, and altering the surface energy. Here we comprehensively review all roles of plasma in the realm of TMDs. The fundamental science behind plasma processing and modification of TMDs and their applications in different fields are presented and discussed. Future perspectives and challenges are highlighted to demonstrate the prominence of TMDs and the importance of surface engineering in next-generation optoelectronic applications.
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Affiliation(s)
- Saeed Sovizi
- Faculty of
Chemistry, Biological and Chemical Research Centre, University of Warsaw, Żwirki i Wigury 101, 02-089, Warsaw, Poland
| | - Shayan Angizi
- Department
of Chemistry and Chemical Biology, McMaster
University, Hamilton, Ontario L8S 4M1, Canada
| | - Sayed Ali Ahmad Alem
- Chair in
Chemistry of Polymeric Materials, Montanuniversität
Leoben, Leoben 8700, Austria
| | - Reyhaneh Goodarzi
- School of
Metallurgy and Materials Engineering, Iran
University of Science and Technology (IUST), Narmak, 16846-13114, Tehran, Iran
| | | | - Hajar Ghanbari
- School of
Metallurgy and Materials Engineering, Iran
University of Science and Technology (IUST), Narmak, 16846-13114, Tehran, Iran
| | - Robert Szoszkiewicz
- Faculty of
Chemistry, Biological and Chemical Research Centre, University of Warsaw, Żwirki i Wigury 101, 02-089, Warsaw, Poland
| | - Abdolreza Simchi
- Department
of Materials Science and Engineering and Institute for Nanoscience
and Nanotechnology, Sharif University of
Technology, 14588-89694 Tehran, Iran
- Center for
Nanoscience and Nanotechnology, Institute for Convergence Science
& Technology, Sharif University of Technology, 14588-89694 Tehran, Iran
| | - Peter Kruse
- Department
of Chemistry and Chemical Biology, McMaster
University, Hamilton, Ontario L8S 4M1, Canada
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63
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de Albornoz-Caratozzolo JM, Cervantes-Sodi F. Chiraltube, rolling 2D materials into chiral nanotubes. NANOSCALE ADVANCES 2023; 6:79-91. [PMID: 38125603 PMCID: PMC10729892 DOI: 10.1039/d3na00301a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Accepted: 09/30/2023] [Indexed: 12/23/2023]
Abstract
Carbon nanotubes (NTs) are graphene sheets rolled into a 1D material, with a specific chirality that defines its structure and properties. Graphene has triggered the development of thousands of 2D materials, which in principle could also be rolled into 1D NTs. However, most of these NTs have not been proposed due to difficulties in the generation of atomic coordinates for chiral NTs from 2D materials with a non-hexagonal lattice or multi-layered materials. In this paper we present Chiraltube, an open-source Python code that allows the quick generation of a complete NT with any chirality from the unit cell of its original 2D material. We explain the inner workings of the code as well as the theoretical background on which it is built, generalizing concepts from the construction of chiral and achiral carbon NTs to work on any other 2D material. We show various examples of the resulting chiral NT structures built from phosphorene, MoS2 and Ti3C2, and present some analysis on the interatomic distortion in the outermost layers of these NTs, as well as the results of ab initio electronic structure calculations on a set of phosphorene NTs generated by the program, showing the immediate practicality and usefulness of the program. We also explore some limitations and details of the tool as well as further work to be done.
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Affiliation(s)
- José M de Albornoz-Caratozzolo
- Universidad Iberoamericana, Physics and Mathematics Department Prol. Paseo de la Reforma 880 Lomas de Santa Fe Ciudad de México Mexico +52 55 59504275
| | - Felipe Cervantes-Sodi
- Universidad Iberoamericana, Physics and Mathematics Department Prol. Paseo de la Reforma 880 Lomas de Santa Fe Ciudad de México Mexico +52 55 59504275
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64
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Shinde PA, Ariga K. Two-Dimensional Nanoarchitectonics for Two-Dimensional Materials: Interfacial Engineering of Transition-Metal Dichalcogenides. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:18175-18186. [PMID: 38047629 DOI: 10.1021/acs.langmuir.3c02929] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/05/2023]
Abstract
Transition-metal dichalcogenides (TMDs) have attracted increasing attention in fundamental studies and technological applications owing to their atomically thin thickness, expanded interlayer distance, motif band gap, and phase-transition ability. Even though TMDs have a wide variety of material assets from semiconductor to semimetallic to metallic, the materials with fixed features may not show excellence for precise application. As a result of exclusive crystalline polymorphs, physical and chemical assets of TMDs can be efficiently modified via various approaches of interface nanoarchitectonics, including heteroatom doping, heterostructure, phase engineering, reducing size, alloying, and hybridization. With modified properties, TMDs become interesting materials in diverse fields, including catalysis, energy, electronics, transistors, and optoelectronics.
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Affiliation(s)
- Pragati A Shinde
- Research Center for Materials Nanoarchitectonics, National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba 305-0044, Japan
| | - Katsuhiko Ariga
- Research Center for Materials Nanoarchitectonics, National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba 305-0044, Japan
- Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan
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65
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Sweety, Kumar D. Electrochemical immunosensor based on titanium dioxide grafted MXene for EpCAM antigen detection. J Colloid Interface Sci 2023; 652:549-556. [PMID: 37607417 DOI: 10.1016/j.jcis.2023.08.099] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 08/09/2023] [Accepted: 08/16/2023] [Indexed: 08/24/2023]
Abstract
This study proposes the fabrication of a highly sensitive electrochemical immunosensor for label-free detection of EpCAM antigen. MXenes, novel 2D materials have become popular owing to their unique electrochemical properties. Unlike conventional immunosensors, which are unable to detect the carcinoma at primary stage and also time consuming, the use of highly conducting MXene provides a label-free and highly sensitive immunosensor. Herein, we develop a unique immunosensor, which is based on the in-situ growth of 2D-TiO2 onto the novel 2D-Ti3C2Tx sheets by hydrothermal treatment. The 2D/2D TiO2/Ti3C2Tx hybrid provides a platform having a large effective surface area, and more number of electrochemically active sites to enhance the electron transfer rate through the redox probe. The designed sensing platform, BSA/anti-EpCAM/TiO2/Ti3C2Tx@ITO shows a broad linear range (1 ag/mL to 10 ng/mL) with high sensitivity (6.661 µA ag-1 mL cm-2), and low detection limit (0.7 ag/mL) for EpCAM antigen detection under optimized conditions. The proposed immunosensor possesses good reproducibility, long-term stability, and outstanding selectivity and specificity. Moreover, the clinical applicability of the novel immunosensor is tested in spiked human serum showing good recovery.
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Affiliation(s)
- Sweety
- Department of Applied Chemistry, Delhi Technological University, Delhi 110042, India.
| | - Devendra Kumar
- Department of Applied Chemistry, Delhi Technological University, Delhi 110042, India.
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66
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Zhao C, Wang R, Fang B, Liang H, Li R, Li S, Xiong Y, Shao Y, Ni B, Wang R, Xu B, Feng S, Mo R. Macroscopic assembly of 2D materials for energy storage and seawater desalination. iScience 2023; 26:108436. [PMID: 38077149 PMCID: PMC10709067 DOI: 10.1016/j.isci.2023.108436] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/28/2024] Open
Abstract
Since the discovery of graphene in 2004, two-dimensional (2D) materials have attracted widespread attention due to their excellent physical and chemical properties in the fields of energy, environment, catalysis, and optoelectronics. However, there are still many key problems in the process of practical application. To further promote the potential of 2D materials for practical applications, macroscopic assembly of 2D materials is crucial for the continued development of 2D materials, especially in the fields of energy storage and seawater desalination. Therefore, this review focuses on the latest progress and current status related to the macroscopic assembly of 2D materials, including 1D fibers, 2D films, and 3D architectures. In addition, the application of macroscopic bodies assembled based on 2D materials in the fields of energy storage and seawater desalination is also introduced. Finally, future directions for the macroscopic assembly of 2D materials and their applications are prospected.
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Affiliation(s)
- Chenpeng Zhao
- School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200030, China
| | - Rui Wang
- School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200030, China
| | - Biao Fang
- School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200030, China
| | - Han Liang
- School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200030, China
| | - Ruqing Li
- School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200030, China
| | - Shuaifei Li
- School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200030, China
| | - Yuhui Xiong
- School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200030, China
| | - Yuye Shao
- School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200030, China
| | - Biyuan Ni
- School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200030, China
| | - Ruyi Wang
- School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200030, China
| | - Biao Xu
- School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200030, China
| | - Songyang Feng
- School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200030, China
| | - Runwei Mo
- School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200030, China
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67
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Zhang L, Zhao Y, Liu Y, Gao G. High spin polarization, large perpendicular magnetic anisotropy and room-temperature ferromagnetism by biaxial strain and carrier doping in Janus MnSeTe and MnSTe. NANOSCALE 2023; 15:18910-18919. [PMID: 37975757 DOI: 10.1039/d3nr04627c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2023]
Abstract
The emerging two-dimensional (2D) Janus systems with broken symmetry provide a new platform for designing ultrathin multifunctional spintronic materials. Recently, based on experimental monolayer MnSe2, ferromagnetism was predicted in Janus MnXY (X ≠ Y = S, Se, Te) monolayers; however, they exhibit low Curie temperatures and small magnetic anisotropic energies. To improve the Curie temperature and magnetic anisotropy, herein, we systemically explore the stability and electronic and magnetic properties of Janus MnSeTe and MnSTe monolayers under strain and carrier-doping using first-principles calculations and Monte Carlo simulations. It is found that both MnSeTe and MnSTe monolayers possess robustly high spin polarization with rational strain and carrier-doping. Both tensile strain and hole doping strengthen the ferromagnetic super-exchange interactions of the two nearest Mn atoms mediated by chalcogen atoms and exceedingly improve the perpendicular magnetic anisotropic energies (by up to 3.1 meV per f.u. for MnSeTe and 2.0 meV per f.u. for MnSTe). The Te-5p intraorbital hybridizations contributed to the main magnetic anisotropy. More remarkably, the tensile strain and hole doping collectively increase the Curie temperatures of MnSeTe and MnSTe to above and near room temperature (345 and 290 K, respectively). The present study reveals that Janus MnSeTe and MnSTe monolayers with robustly high spin polarization, room-temperature ferromagnetism and large perpendicular magnetic anisotropy are promising candidates for ultrathin multifunctional spintronic materials. This study will be of great interest for further experimental and theoretical explorations of 2D Janus manganese dichalcogenides.
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Affiliation(s)
- Long Zhang
- School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China.
| | - Yan Zhao
- School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China.
| | - Yuqi Liu
- School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China.
| | - Guoying Gao
- School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China.
- Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan 430074, China
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68
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Geng L, Chen K, Lu H, Wang S, Yang Y. Exploring electronic and valley properties of single-layer SMSiN 2 (M = Mo, W): a first-principles study on two-dimensional Janus materials. Phys Chem Chem Phys 2023; 25:32021-32028. [PMID: 37981807 DOI: 10.1039/d3cp04283a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2023]
Abstract
In this study, we employ first-principles calculations to explore the electronic and valleytronic properties of single-layer (SL) SMSiN2 (M = Mo, W), which are two-dimensional Janus materials with strong spin-orbit coupling. Our findings indicate that SL SMoSiN2/SWSiN2 possess a direct/indirect band gap, where the valence band maximum is situated at the K/K' point, giving rise to the formation of degenerate valleys. When considering spin-orbit coupling, SMoSiN2 and SWSiN2 demonstrate intriguing valley spin splitting in their valleys, with a maximum splitting of up to 0.14/0.39 eV in the valence bands. By implementing magnetic doping with V and Cr, we provide a demonstration that valley polarization could be realized in SL SMSiN2. Moreover, the findings reveal high carrier mobility in SL SMSiN2, notably in SWSiN2, where hole carriers can achieve a remarkable mobility of up to 7.98 × 103 cm2 V-1 s-1 along the zigzag direction. Furthermore, our observations suggest that strain can be effectively utilized to manipulate the character and magnitude of the band gap, as well as the valley spin splitting in these materials.
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Affiliation(s)
- Lijie Geng
- School of Electronics and Information, Zhengzhou University of Light Industry, Zhengzhou, China.
- Henan Key Laboratory of Magnetoelectronic Information Functional Materials, Zhengzhou University of Light Industry, Zhengzhou, China
| | - Kun Chen
- School of Electronics and Information, Zhengzhou University of Light Industry, Zhengzhou, China.
- Henan Key Laboratory of Magnetoelectronic Information Functional Materials, Zhengzhou University of Light Industry, Zhengzhou, China
| | - Hongyan Lu
- School of Physics and Physical Engineering, Qufu Normal University, Qufu, China
| | - Shizhuo Wang
- School of Electronics and Information, Zhengzhou University of Light Industry, Zhengzhou, China.
- Henan Key Laboratory of Magnetoelectronic Information Functional Materials, Zhengzhou University of Light Industry, Zhengzhou, China
| | - Yang Yang
- School of Electronics and Information, Zhengzhou University of Light Industry, Zhengzhou, China.
- Henan Key Laboratory of Magnetoelectronic Information Functional Materials, Zhengzhou University of Light Industry, Zhengzhou, China
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69
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Asikainen K, Alatalo M, Huttula M, Sasikala Devi AA. Tuning the Electronic Properties of Two-Dimensional Lepidocrocite Titanium Dioxide-Based Heterojunctions. ACS OMEGA 2023; 8:45056-45064. [PMID: 38046343 PMCID: PMC10688046 DOI: 10.1021/acsomega.3c06786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Revised: 10/24/2023] [Accepted: 10/27/2023] [Indexed: 12/05/2023]
Abstract
Two-dimensional (2D) heterostructures reveal novel physicochemical phenomena at different length scales that are highly desirable for technological applications. We present a comprehensive density functional theory study of van der Waals (vdW) heterostructures constructed by stacking 2D TiO2 and 2D MoSSe monolayers to form the TiO2-MoSSe heterojunction. The heterostructure formation is found to be exothermic, indicating stability. We find that by varying the atomic species at the interfaces, the electronic structure can be considerably altered due to the differences in charge transfer arising from the inherent electronegativity of the atoms. We demonstrate that the heterostructures possess a type II or type III band alignment, depending on the atomic termination of MoSSe at the interface. The observed charge transfer occurs from MoSSe to TiO2. Our results suggest that the Janus interface enables the tuning of electronic properties, providing an understanding of the possible applications of the TiO2-MoSSe heterostructure.
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Affiliation(s)
- Kati Asikainen
- Nano and Molecular Systems
Research Unit, University of Oulu, Oulu FI-90014, Finland
| | - Matti Alatalo
- Nano and Molecular Systems
Research Unit, University of Oulu, Oulu FI-90014, Finland
| | - Marko Huttula
- Nano and Molecular Systems
Research Unit, University of Oulu, Oulu FI-90014, Finland
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70
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Sari B, Zeltmann SE, Zhao C, Pelz PM, Javey A, Minor AM, Ophus C, Scott MC. Analysis of Strain and Defects in Tellurium-WSe 2 Moiré Heterostructures Using Scanning Nanodiffraction. ACS NANO 2023; 17:22326-22333. [PMID: 37956410 PMCID: PMC10690779 DOI: 10.1021/acsnano.3c04283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2023] [Revised: 11/02/2023] [Accepted: 11/03/2023] [Indexed: 11/15/2023]
Abstract
In recent years, there has been an increasing focus on 2D nongraphene materials that range from insulators to semiconductors to metals. As a single-elemental van der Waals semiconductor, tellurium (Te) has captivating anisotropic physical properties. Recent work demonstrated growth of ultrathin Te on WSe2 with the atomic chains of Te aligned with the armchair directions of the substrate using physical vapor deposition (PVD). In this system, a moiré superlattice is formed where micrometer-scale Te flakes sit on top of the continuous WSe2 film. Here, we determined the precise orientation of the Te flakes with respect to the substrate and detailed structure of the resulting moiré lattice by combining electron microscopy with image simulations. We directly visualized the moiré lattice using center of mass-differential phase contrast (CoM-DPC). We also investigated the local strain within the Te/WSe2 layered materials using scanning nanodiffraction techniques. There is a significant tensile strain at the edges of flakes along the direction perpendicular to the Te chain direction, which is an indication of the preferred orientation for the growth of Te on WSe2. In addition, we observed local strain relaxation regions within the Te film, specifically attributed to misfit dislocations, which we characterize as having a screw-like nature. The detailed structural analysis gives insight into the growth mechanisms and strain relaxation in this moiré heterostructure.
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Affiliation(s)
- Bengisu Sari
- Department
of Materials Science and Engineering, University
of California Berkeley, Berkeley, California 94720, United States
- The
National Center for Electron Microscopy, Molecular Foundry, Berkeley, California 94720, United States
- Materials
Science Division, Lawrence Berkeley National
Laboratory, Berkeley, California 94720-8099, United States
| | - Steven E. Zeltmann
- Department
of Materials Science and Engineering, University
of California Berkeley, Berkeley, California 94720, United States
| | - Chunsong Zhao
- Department
of Materials Science and Engineering, University
of California Berkeley, Berkeley, California 94720, United States
- Materials
Science Division, Lawrence Berkeley National
Laboratory, Berkeley, California 94720-8099, United States
- Department
of Electrical Engineering and Computer Sciences, University of California Berkeley, Berkeley, California 94720, United States
| | - Philipp M. Pelz
- Institute
of Micro- and Nanostructure Research, Center for Nanoanalysis and
Electron Microscopy, Interdisciplinary Center for Nanostructured Films, Friedrich-Alexander-Universitat Erlangen-Nurnberg, Erlangen 91058, Germany
| | - Ali Javey
- Materials
Science Division, Lawrence Berkeley National
Laboratory, Berkeley, California 94720-8099, United States
- Department
of Electrical Engineering and Computer Sciences, University of California Berkeley, Berkeley, California 94720, United States
| | - Andrew M. Minor
- Department
of Materials Science and Engineering, University
of California Berkeley, Berkeley, California 94720, United States
- The
National Center for Electron Microscopy, Molecular Foundry, Berkeley, California 94720, United States
| | - Colin Ophus
- The
National Center for Electron Microscopy, Molecular Foundry, Berkeley, California 94720, United States
| | - Mary C. Scott
- Department
of Materials Science and Engineering, University
of California Berkeley, Berkeley, California 94720, United States
- The
National Center for Electron Microscopy, Molecular Foundry, Berkeley, California 94720, United States
- Materials
Science Division, Lawrence Berkeley National
Laboratory, Berkeley, California 94720-8099, United States
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71
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Lubert-Perquel D, Acharya S, Johnson JC. Optically Addressing Exciton Spin and Pseudospin in Nanomaterials for Spintronics Applications. ACS APPLIED OPTICAL MATERIALS 2023; 1:1742-1760. [PMID: 38037653 PMCID: PMC10683369 DOI: 10.1021/acsaom.3c00299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 10/26/2023] [Accepted: 10/26/2023] [Indexed: 12/02/2023]
Abstract
Oriented exciton spins that can be generated and manipulated optically are of interest for a range of applications, including spintronics, quantum information science, and neuromorphic computing architectures. Although materials that host such excitons often lack practical coherence times for use on their own, strategic transduction of the magnetic information across interfaces can combine fast modulation with longer-term storage and readout. Several nanostructure systems have been put forward due to their interesting magneto-optical properties and their possible manipulation using circularly polarized light. These material systems are presented here, namely two-dimensional (2D) systems due to the unique spin-valley coupling properties and quantum dots for their exciton fine structure. 2D magnets are also discussed for their anisotropic spin behavior and extensive 2D magnetic states that are not yet fully understood but could pave the way for emergent techniques of magnetic control. This review also details the experimental and theoretical tools to measure and understand these systems along with a discussion on the progress of optical manipulation of spins and magnetic order transitions.
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Affiliation(s)
- Daphné Lubert-Perquel
- Materials, Chemical, and
Computational Science Directorate, National
Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, Colorado 80401, United States
| | - Swagata Acharya
- Materials, Chemical, and
Computational Science Directorate, National
Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, Colorado 80401, United States
| | - Justin C. Johnson
- Materials, Chemical, and
Computational Science Directorate, National
Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, Colorado 80401, United States
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72
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Lan J, Peng Y, Liang L, Duan X, Kong Z, Zhang L, Shen JW. Theoretical study of protein adsorption on graphene/h-BN heterostructures. Phys Chem Chem Phys 2023; 25:31206-31221. [PMID: 37955184 DOI: 10.1039/d3cp03303a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2023]
Abstract
The biological characteristics of planar heterojunction nanomaterials and their interactions with biomolecules are crucial for the potential application of these materials in the biomedical field. This study employed molecular dynamics (MD) simulations to investigate the interactions between proteins with distinct secondary structures (a single α-helix representing the minimal oligomeric domain protein, a single β-sheet representing the WW structural domain of the Yap65 protein, and a mixed α/β structure representing the BBA protein) and a planar two-dimensional heterojunction (a GRA/h-BN heterojunction consisting of a graphene nanoplate (GRA) and a hexagonal boron nitride nanoplate (h-BN)). The results indicate that all three kinds of protein can be quickly and stably adsorbed on the GRA/h-BN heterojunction due to the strong van der Waals interaction, regardless of their respective types, structures and initial orientations. Moreover, the proteins exhibit a pronounced binding preference for the hBN region of the GRA/h-BN heterojunction. Upon adsorption, the α-helix structure of the minimal oligomeric domain protein experiences partial or complete denaturation. Conversely, while the secondary structure of the single β-sheet and mixed α/β structure (BBA protein) undergoes slight changes (focus on the coil and turn regions), the main α-helix and β-sheet structures remain intact. The initial orientation significantly impacts the degree of protein adsorption and its position on the GRA/h-BN heterojunction. However, regardless of the initial orientation, proteins can ultimately be adsorbed onto the GRA/h-BN heterojunction. Furthermore, the initial orientation has a minor influence on the structural changes of proteins. Significantly, the combination of different secondary structures helps mitigate the denaturation of a single α-helix structure to some extent. Overall, the adsorption of proteins on GRA/h-BN is primarily driven by van der Waals and hydrophobic interactions. Proteins with β-sheet or mixed structures exhibit stronger biocompatibility on the GRA/h-BN heterojunction. Our research elucidated the biological characteristics of GRA/h-BN heterojunction nanomaterials and their interactions with proteins possessing diverse secondary structures. It offers a theoretical foundation for considering heterojunction nanomaterials as promising candidates for biomedical applications.
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Affiliation(s)
- Jun Lan
- College of Automation, Hangzhou Dianzi University, Hangzhou, 310018, China.
| | - Yiran Peng
- College of Automation, Hangzhou Dianzi University, Hangzhou, 310018, China.
| | - Lijun Liang
- College of Automation, Hangzhou Dianzi University, Hangzhou, 310018, China.
| | - Xing Duan
- Center of Advanced Optoelectronic Materials and Devices, Key Laboratory of Novel Materials for Sensor of Zhejiang Province, College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou, 310018, China
| | - Zhe Kong
- Center of Advanced Optoelectronic Materials and Devices, Key Laboratory of Novel Materials for Sensor of Zhejiang Province, College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou, 310018, China
| | - Li Zhang
- Department of Chemistry, Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, Zhejiang Sci-Tech University, Hangzhou, 310018, China
| | - Jia-Wei Shen
- School of Pharmacy, Hangzhou Normal University, Hangzhou, Zhejiang 311121, China
- Key Laboratory of Elemene Class Anti-Cancer Chinese Medicines, Engineering Laboratory of Development and Application of Traditional Chinese Medicines, Collaborative Innovation Center of Traditional Chinese Medicines of Zhejiang Province, Hangzhou Normal University, Hangzhou, Zhejiang 311121, China.
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73
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Li X, Wang Z, Lei Z, Ding W, Shi X, Yan J, Ku J. Magnetic characterization techniques and micromagnetic simulations of magnetic nanostructures: from zero to three dimensions. NANOSCALE 2023. [PMID: 37981862 DOI: 10.1039/d3nr04493a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2023]
Abstract
The investigation of the magnetic characteristics of magnetic nanostructures (MNs) in various dimensions is a crucial direction of research in nanomagnetism, with MNs belonging to various dimensions exhibiting magnetic properties related to their geometry. A better understanding of these magnetic properties is required for MN manipulation. The primary tools for researching MNs are magnetic characterisation techniques with great spatial resolution and spin sensitivity. Micromagnetic simulation is another technique that minimises experimental costs, while providing information on the magnetic structure and magnetic behaviour, and has enormous potential for predicting, validating, and extending the magnetic characterisation results. This review first looks at the progress of research into quantitatively characterising the magnetic properties of low-dimensional (including 0D, 1D, and 2D) and 3D MNs in two directions: magnetic characterisation techniques and micromagnetic simulations, with a particular emphasis on the potential for future applications of these techniques. Single magnetic characterization techniques, single micromagnetic simulations, or a mix of both are utilised in these research studies to investigate MNs in a variety of dimensions. How the magnetic characterisation techniques and micromagnetic simulations can be better applied to MNs in various dimensions is then outlined. This discussion has significant application potential for low-dimensional and 3D MNs.
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Affiliation(s)
- Xin Li
- Zijin School of Geology and Mining, Fuzhou University, Fuzhou 350116, China.
- Fujian Key Laboratory of Green Extraction and High-value Utilization of Energy Metals, Fuzhou 350116, China
| | - Zhaolian Wang
- Shandong Huate Magnet Technology Co., Ltd, Weifang 261000, China
| | - Zhongyun Lei
- College of Chemical Engineering, Fuzhou University, Fuzhou 350116, China
| | - Wei Ding
- Zijin School of Geology and Mining, Fuzhou University, Fuzhou 350116, China.
| | - Xiao Shi
- Zijin School of Geology and Mining, Fuzhou University, Fuzhou 350116, China.
| | - Jujian Yan
- Zijin School of Geology and Mining, Fuzhou University, Fuzhou 350116, China.
| | - Jiangang Ku
- Zijin School of Geology and Mining, Fuzhou University, Fuzhou 350116, China.
- Fujian Key Laboratory of Green Extraction and High-value Utilization of Energy Metals, Fuzhou 350116, China
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74
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Cao S, Xu X, Liu Q, Chen H, Zhu H, Lin Y. Co quantum dots embedded in modified montmorillonite loaded with graphitized carbon as an ultra-stable anode material for sodium-ion battery. J Colloid Interface Sci 2023; 650:1073-1085. [PMID: 37463533 DOI: 10.1016/j.jcis.2023.07.064] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Revised: 07/05/2023] [Accepted: 07/10/2023] [Indexed: 07/20/2023]
Abstract
Carbonaceous materials are competitive anodes in sodium-ion batteries (SIBs) due to their advantages, such as low cost, abundant active sites, and porosity. However, this type of material still suffers from slow rate capability and low capacity, which greatly hinders its application. In this work, the biomass-derived carbon is optimized based on a layered montmorillonite (Mt) skeleton and the cobalt quantum dots (Co QDs). A three-dimensional (3D) combination, specifically a 3D flower-like structure, of 0D material (Co QDs) and a two-dimensional (2D) material (Mt) has been achieved. The optimization and local limited effects of the Co QDs on the electronic properties have been demonstrated by density functional theory (DFT). The metallic Co QDs and carbon could form a Mott-Schottky junction, enhancing the conductivity and Na+ adsorption. Due to the synergetic improvement of structure and conductivity, the stripped Mt embedded with Co QDs loaded with nitrogen doped carbon (FMt@Co-NC) shows ultra-stable cycle stability (99.12% retention after 10,000 cycles at 10 A/g). This is the first time that Mt has been employed in high performance SIBs, which incubates a grand blueprint for effectively utilizing similar inactive energy-storage materials, through a simple and reliable approach.
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Affiliation(s)
- Shiyue Cao
- Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan 430072, China
| | - Xiaoting Xu
- Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan 430072, China
| | - Qiming Liu
- Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan 430072, China.
| | - Hongyi Chen
- Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan 430072, China
| | - Huijuan Zhu
- Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan 430072, China
| | - Ye Lin
- Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan 430072, China
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75
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Ye P, Xiao J, Fan J, Chen J, Gao N, Yang X. Structural Characterization of Boron Sheets beyond the Monolayer and Implication for Experimental Synthesis and Identification. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:16191-16198. [PMID: 37930136 DOI: 10.1021/acs.langmuir.3c02573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2023]
Abstract
The successful synthesis of quasi-freestanding bilayer borophene has aroused much attention for its superior physical properties and holds great promise for future electronic devices. Herein, we comprehensively explore six boron sheets beyond the monolayer and structurally characterize them via various methods using first-principles calculations for experimental references. On the basis of atomic models of borophenes, simulated scanning tunneling microscope (STM) images show different morphologies at different bias voltages and are explained by the partial densities of states and the height differences in the vertical direction. Simulated transmission electron microscope images further probe the internal atomic arrangement of boron sheets and compensate for the shortcomings of STM images to better distinguish different phases of boron sheets. The interlayer coupling strength is stronger in bilayer borophenes than in the three-layer system via the electron localization function and Mulliken bond population. In addition, simulated X-ray diffraction and infrared spectra show different characteristic peaks and corresponding vibrational modes to further characterize these boron sheets. These theoretical results can decrease the prime cost and provide vital guidance for the experimental synthesis and identification of boron sheets beyond the monolayer.
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Affiliation(s)
- Panbin Ye
- School of Materials Science and Engineering, Taizhou University, Taizhou 318000, China
| | - Jingyi Xiao
- Instrumental Analysis Center, Dalian University of Technology, Dalian 116024, China
| | - Junyu Fan
- Department of Physics, Taiyuan Normal University, Jinzhong 030619, People's Republic of China
| | - Jinghuang Chen
- School of Materials Science and Engineering, Taizhou University, Taizhou 318000, China
| | - Nan Gao
- School of Materials Science and Engineering, Taizhou University, Taizhou 318000, China
| | - Xiaowei Yang
- Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Dalian University of Technology), Ministry of Education, Dalian 116024, China
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76
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Jia Y, Gao Y, Liu Y. First-principles study of two-dimensional half-metallic ferromagnetism in CrSiSe 4monolayer. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2023; 36:075701. [PMID: 37922560 DOI: 10.1088/1361-648x/ad098e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Accepted: 11/03/2023] [Indexed: 11/07/2023]
Abstract
Two-dimensional (2D) ferromagnetic (FM) half-metallic materials have attracted intensive attention due to their unique electronic and magnetic properties and potential applications in spintronic devices. In this study, we predicted a stable 2D half-metallic material monolayer CrSiSe4using first-principles density functional theory. The structure, electronic and magnetic properties were systematically studied. The calculations show that the monolayer CrSiSe4is a dynamically stable FM half-metallic material. The spin-dependent transport properties and the Curie temperature up to 239 K are demonstrated. The spin band gap of monolayer CrSiSe4was about 0.83 eV by the the Heyd-Scuseria-Ernzerhof function calculation. The magnetic anisotropy energy of each Cr atom in the monolayer of CrSiSe4is-552.3μeV. When the applied biaxial tensile strain is greater than 2%, monolayer CrSiSe4spin-up conduction band and valence band will show a band gap at the Fermi level, and the electronic properties change from a half-metal to a semiconductor. Thus, the monolayer CrSiSe4can provide an ideal candidate material for exploring 2D magnetic and spintronics experiments.
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Affiliation(s)
- Yuanyuan Jia
- State Key Laboratory of Metastable Materials Science and Technology & Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao 066004, People's Republic of China
| | - Yan Gao
- State Key Laboratory of Metastable Materials Science and Technology & Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao 066004, People's Republic of China
| | - Yong Liu
- State Key Laboratory of Metastable Materials Science and Technology & Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao 066004, People's Republic of China
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77
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Arfaoui M, Zawadzka N, Ayari S, Chen Z, Watanabe K, Taniguchi T, Babiński A, Koperski M, Jaziri S, Molas MR. Optical properties of orthorhombic germanium sulfide: unveiling the anisotropic nature of Wannier excitons. NANOSCALE 2023; 15:17014-17028. [PMID: 37843442 DOI: 10.1039/d3nr03168c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2023]
Abstract
To fully explore exciton-based applications and improve their performance, it is essential to understand the exciton behavior in anisotropic materials. Here, we investigate the optical properties of anisotropic excitons in GeS encapsulated by h-BN using different approaches that combine polarization- and temperature-dependent photoluminescence (PL) measurements, ab initio calculations, and effective mass approximation (EMA). Using the Bethe-Salpeter Equation (BSE) method, we found that the optical absorption spectra in GeS are significantly affected by the Coulomb interaction included in the BSE method, which shows the importance of excitonic effects besides it exhibits a significant dependence on the direction of polarization, revealing the anisotropic nature of bulk GeS. By combining ab initio calculations and EMA methods, we investigated the quasi-hydrogenic exciton states and oscillator strength (OS) of GeS along the zigzag and armchair axes. We found that the anisotropy induces lifting of the degeneracy and mixing of the excitonic states in GeS, which results in highly non-hydrogenic features. A very good agreement with the experiment is observed.
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Affiliation(s)
- Mehdi Arfaoui
- Laboratoire de Physique de la Matière Condensée, Département de Physique, Faculté des Sciences de Tunis, Université Tunis El Manar, Campus Universitaire, 1060 Tunis, Tunisia.
| | - Natalia Zawadzka
- Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Warsaw, Poland.
| | - Sabrine Ayari
- Laboratoire de Physique de l'Ecole normale supérieure, ENS, Université PSL, CNRS, Sorbonne Université, Université de Paris, 24 rue Lhomond, 75005 Paris, France
| | - Zhaolong Chen
- Institute for Functional Intelligent Material, National University of Singapore, 117575, Singapore
- Department of Materials Science and Engineering, National University of Singapore, 117575, Singapore
| | - Kenji Watanabe
- Research Center for Electronic and Optical Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
| | - Takashi Taniguchi
- Research Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
| | - Adam Babiński
- Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Warsaw, Poland.
| | - Maciej Koperski
- Institute for Functional Intelligent Material, National University of Singapore, 117575, Singapore
- Department of Materials Science and Engineering, National University of Singapore, 117575, Singapore
| | - Sihem Jaziri
- Laboratoire de Physique de la Matière Condensée, Département de Physique, Faculté des Sciences de Tunis, Université Tunis El Manar, Campus Universitaire, 1060 Tunis, Tunisia.
| | - Maciej R Molas
- Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Warsaw, Poland.
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78
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Yu M, Zhang F, Gao W, Shen H, Kang L, Ju L, Yin H. Two-dimensional InTeClO 3: an ultrawide-bandgap material with potential application in a deep ultraviolet photodetector. Phys Chem Chem Phys 2023; 25:29241-29248. [PMID: 37874031 DOI: 10.1039/d3cp03612j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2023]
Abstract
Ultrawide-bandgap semiconductors, possessing bandgaps distinctly larger than the 3.4 eV of GaN, have emerged as a promising class capable of achieving deep ultraviolet (UV) light detection. Based on first-principles calculations, we propose an unexplored two-dimensional (2D) InTeClO3 layered system with ultrawide bandgaps ranging from 4.34 eV of bulk to 4.54 eV of monolayer. Our calculations demonstrate that 2D InTeClO3 monolayer can be exfoliated from its bulk counterpart and maintain good thermal and dynamic stability at room temperature. The ultrawide bandgaps may be modulated by the small in-plane strains and layer thickness in a certain range. Furthermore, the 2D InTeClO3 monolayer shows promising electron transport behavior and strong optical absorption capacity in the deep UV range. A two-probe InTeClO3-based photodetection device has been constructed for evaluating the photocurrent. Remarkably, the effective photocurrent (5.7 A m-2 at photon energy of 4.2 eV) generation under polarized light has been observed in such a photodetector. Our results indicate that 2D InTeClO3 systems have strong photoresponse capacity in the deep UV region, accompanying the remarkable polarization sensitivity and high extinction ratio. These distinctive characteristics highlight the promising application prospects of InTeClO3 materials in the field of deep UV optoelectronics.
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Affiliation(s)
- Meiyang Yu
- Joint Center for Theoretical Physics, Institute for Computational Materials Science, and International Joint Research Laboratory of New Energy Materials and Devices of Henan Province, School of Physics and Electronics, Henan University, Kaifeng 475004, China.
| | - Fumin Zhang
- Joint Center for Theoretical Physics, Institute for Computational Materials Science, and International Joint Research Laboratory of New Energy Materials and Devices of Henan Province, School of Physics and Electronics, Henan University, Kaifeng 475004, China.
| | - Wenjiang Gao
- Joint Center for Theoretical Physics, Institute for Computational Materials Science, and International Joint Research Laboratory of New Energy Materials and Devices of Henan Province, School of Physics and Electronics, Henan University, Kaifeng 475004, China.
| | - Huimin Shen
- Joint Center for Theoretical Physics, Institute for Computational Materials Science, and International Joint Research Laboratory of New Energy Materials and Devices of Henan Province, School of Physics and Electronics, Henan University, Kaifeng 475004, China.
| | - Lili Kang
- Joint Center for Theoretical Physics, Institute for Computational Materials Science, and International Joint Research Laboratory of New Energy Materials and Devices of Henan Province, School of Physics and Electronics, Henan University, Kaifeng 475004, China.
| | - Lin Ju
- School of Physics and Electric Engineering, Anyang Normal University, Anyang 455000, China.
| | - Huabing Yin
- Joint Center for Theoretical Physics, Institute for Computational Materials Science, and International Joint Research Laboratory of New Energy Materials and Devices of Henan Province, School of Physics and Electronics, Henan University, Kaifeng 475004, China.
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79
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Huang H, Zheng Y, Liu C, Zhang Z, Gao M, Wang J, Liu Y, Chu PK, Yu XF. Interfacial Engineering Enables Perovskite Heteroepitaxial Growth on Black Phosphorus for Flexible X-ray Detectors. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2303229. [PMID: 37475501 DOI: 10.1002/smll.202303229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 06/12/2023] [Indexed: 07/22/2023]
Abstract
2D materials with atomic-scale thickness and mechanical robustness are required for flexible devices. The superior optoelectronic properties and high-Z atoms in metal halide perovskites render them desirable for X-ray detection, but the intrinsic brittleness is an obstacle hampering the applications in flexible detectors. Herein, an interfacial engineering strategy is demonstrated for the epitaxial growth of methylammonium lead bromide (MAPbBr3 ) on black phosphorus (BP) for flexible X-ray detectors. The mechanically robust, high-quality heterostructure consisting of a Pb transition layer is synthesized for the two-way bridging of BP and MAPbBr3 . Excellent optoelectronic properties such as a high X-ray sensitivity of 1,609 ± 122 µC Gy-1 cm-2 (80 times higher than that of the commercial amorphous Se), a fast response time of 40 ± 5 ms, as well as a low detection limit of 3 µGys-1 (about a fifteenth of the medical chest X-ray dose rate) are achieved from the simple and planar direct X-ray detector fabricated on an organic filter membrane. More importantly, these flat and simple devices are bendable and mechanically durable by exhibiting only 10% photocurrent degradation after 200 bending cycles. The novel heterostructure has great potential in large-area, flexible, and sensitive X-ray detection applications.
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Affiliation(s)
- Hao Huang
- Shenzhen Key Laboratory of Micro/Nano Biosensing, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, P. R. China
- Hubei Three Gorges Laboratory, Yichang, Hubei, 443007, P. R. China
| | - Ying Zheng
- Shenzhen Key Laboratory of Micro/Nano Biosensing, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, P. R. China
- Nano Science and Technology Institute, University of Science and Technology of China, Suzhou, 215123, P. R. China
| | - Chang Liu
- Hubei Three Gorges Laboratory, Yichang, Hubei, 443007, P. R. China
| | - Zhenyu Zhang
- Shenzhen Key Laboratory of Micro/Nano Biosensing, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, P. R. China
| | - Ming Gao
- Shenzhen Key Laboratory of Micro/Nano Biosensing, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, P. R. China
| | - Jiahong Wang
- Hubei Three Gorges Laboratory, Yichang, Hubei, 443007, P. R. China
| | - Yanliang Liu
- Shenzhen Key Laboratory of Micro/Nano Biosensing, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, P. R. China
| | - Paul K Chu
- Department of Physics, Department of Materials Science and Engineering, and Department of Biomedical Engineering, City University of Hong Kong, Tat Chee Avenue, Hong Kong, Kowloon, 999077, China
| | - Xue-Feng Yu
- Shenzhen Key Laboratory of Micro/Nano Biosensing, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, P. R. China
- Hubei Three Gorges Laboratory, Yichang, Hubei, 443007, P. R. China
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80
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Prasad A, Varshney V, Nepal D, Frank GJ. Bioinspired Design Rules from Highly Mineralized Natural Composites for Two-Dimensional Composite Design. Biomimetics (Basel) 2023; 8:500. [PMID: 37887631 PMCID: PMC10604232 DOI: 10.3390/biomimetics8060500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 10/12/2023] [Accepted: 10/17/2023] [Indexed: 10/28/2023] Open
Abstract
Discoveries of two-dimensional (2D) materials, exemplified by the recent entry of MXene, have ushered in a new era of multifunctional materials for applications from electronics to biomedical sensors due to their superior combination of mechanical, chemical, and electrical properties. MXene, for example, can be designed for specialized applications using a plethora of element combinations and surface termination layers, making them attractive for highly optimized multifunctional composites. Although multiple critical engineering applications demand that such composites balance specialized functions with mechanical demands, the current knowledge of the mechanical performance and optimized traits necessary for such composite design is severely limited. In response to this pressing need, this paper critically reviews structure-function connections for highly mineralized 2D natural composites, such as nacre and exoskeletal of windowpane oysters, to extract fundamental bioinspired design principles that provide pathways for multifunctional 2D-based engineered systems. This paper highlights key bioinspired design features, including controlling flake geometry, enhancing interface interlocks, and utilizing polymer interphases, to address the limitations of the current design. Challenges in processing, such as flake size control and incorporating interlocking mechanisms of tablet stitching and nanotube forest, are discussed along with alternative potential solutions, such as roughened interfaces and surface waviness. Finally, this paper discusses future perspectives and opportunities, including bridging the gap between theory and practice with multiscale modeling and machine learning design approaches. Overall, this review underscores the potential of bioinspired design for engineered 2D composites while acknowledging the complexities involved and providing valuable insights for researchers and engineers in this rapidly evolving field.
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Affiliation(s)
- Anamika Prasad
- Department of Biomedical Engineering, Florida International University, Miami, FL 33174, USA
- Department of Mechanical and Materials Engineering, Florida International University, Miami, FL 33174, USA
| | - Vikas Varshney
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson Air Force Base, Dayton, OH 45433, USA; (V.V.); (D.N.); (G.J.F.)
| | - Dhriti Nepal
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson Air Force Base, Dayton, OH 45433, USA; (V.V.); (D.N.); (G.J.F.)
| | - Geoffrey J. Frank
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson Air Force Base, Dayton, OH 45433, USA; (V.V.); (D.N.); (G.J.F.)
- University of Dayton Research Institute, Dayton, OH 45469, USA
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81
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Priyadharsan RR, Timothy RA, Thomas JM, Jeyakumar TC, Rajaram R, Louis H. Investigating the structure, bonding, and energy decomposition analysis of group 10 transition metal carbonyls with substituted terminal germanium chalcogenides [M(CO) 3GeX] (M = Ni, Pd, and Pt; X = O, S, Se, and Te) complexes: insight from first-principles calculations. J Mol Model 2023; 29:344. [PMID: 37847395 DOI: 10.1007/s00894-023-05745-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Accepted: 10/02/2023] [Indexed: 10/18/2023]
Abstract
CONTEXT This research focused on the theoretical investigation of transition metal carbonyls [M(CO)4] coordinated with terminal germanium chalcogenides complexes [M(CO)3GeX], where M represents Ni, Pd, and Pt and X represents O, S, Se, and Te labeled 1-15. While the notable complexes M(CO)4 (where M = Ni, Pd, Pt) numbered 1, 6, and 11 are of significance, substituting one of the CO ligands in 1, 6, and 11 with a GeX ligand (where X = O, S, Se, or Te) result in substituted complexes (2-5, 7-10, and 11-15). Substituting of the CO ligand slightly alters these bond angles. Specifically, the ∠CMC bond angles for [Ni] complexes range from 111.9° to 112.2°, for [Pd] complexes from 111.4° to 111.7°, and for [Pt] complexes from 112.4° to 112.8°. These findings indicate a minor deviation from the tetrahedral geometry due to the influence of the new GeX ligand. Similarly, there is a slight change in the geometry of the metal complexes, where the ∠GeMC angles for [Ni] complexes are between 106.7° and 106.9°, for [Pd] complexes between 107.2° and 107.5°, and for [Pt] complexes between 105.9° and 106.4°. Comparing among the substituted GeX complexes, those containing GeTe exhibit a higher natural bond orbital (NBO) contribution from the Ge atom compared to the M atom. Consequently, based on the above observations, it can be inferred that GeX acts as an effective sigma donor in contrast to carbonyl compounds. Results of energy decomposition analysis (EDA) for the M-CO bond in 1, 6, and 11 and for the M-GeX bond in the other [M(CO)3(GeX)] complexes where M = Ni, Pd and Pt. The percentage contribution of ΔEelstat and ΔEorb shows a relatively identical behavior for all ligands in case of each metal complexes. METHODS Density functional theory (DFT) calculations were conducted using the B3LYP/gen/6-31G*/LanL2DZ level of theory to examine transition metal carbonyls [M(CO)4] coordinated with terminal germanium chalcogenides complexes [M(CO)3GeX], where M represents Ni, Pd, and Pt, and X represents O, S, Se, and Te labeled 1-15 utilized through the use of Gaussian 09W and GaussView 6.0.16 software packages. Post-processing computational code such as multi-wave function was employed for results analysis and visualization.
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Affiliation(s)
- R Rameshbabu Priyadharsan
- PG & Research Department of Chemistry, The American College (Autonomous), Madurai, Tamil Nadu, India
| | - Rawlings A Timothy
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
| | - Jisha Mary Thomas
- Department of Chemistry, Pondicherry University, Puducherry, 605014, India
| | | | - Rajendran Rajaram
- Department of Chemistry, Madanapalle Institute of Technology and Science, Angallu (V), Madanapalle, Andhra Pradesh, 517325, India
| | - Hitler Louis
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria.
- Centre for Herbal Pharmacology and Environmental Sustainability, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Kelambakkam, 603103, Tamil Nadu, India.
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82
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Xu Q, Wu Q, Wang C, Zhang X, Cai Z, Lin L, Gu X, Ostrikov KK, Nan H, Xiao S. High-performance multilayer WSe 2/SnS 2p-n heterojunction photodetectors by two step confined space chemical vapor deposition. NANOTECHNOLOGY 2023; 34:505604. [PMID: 37748477 DOI: 10.1088/1361-6528/acfcc3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Accepted: 09/25/2023] [Indexed: 09/27/2023]
Abstract
Two-dimensional (2D) p-n heterojunctions have attracted great attention due to their outstanding properties in electronic and optoelectronic devices, especially in photodetectors. Various types of heterojunctions have been constituted by mechanical exfoliation and stacking. However, achieving controlled growth of heterojunction structures remains a tremendous challenge. Here, we employed a two-step KI-assisted confined-space chemical vapor deposition method to prepare multilayer WSe2/SnS2p-n heterojunctions. Optical characterization results revealed that the prepared WSe2/SnS2vertical heterostructures have clear interfaces as well as vertical heterostructures. The electrical and optoelectronic properties were investigated by constructing the corresponding heterojunction devices, which exhibited good rectification characteristics and obtained a high detectivity of 7.85 × 1012Jones and a photoresponse of 227.3 A W-1under visible light irradiation, as well as a fast rise/fall time of 166/440μs. These remarkable performances are likely attributed to the ultra-low dark current generated in the depletion region at the junction and the high direct tunneling current during illumination. This work demonstrates the value of multilayer WSe2/SnS2heterojunctions for applications in high-performance photodetectors.
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Affiliation(s)
- Qilei Xu
- Engineering Research Center of IoT Technology Applications (Ministry of Education), Department of Electronic Engineering, Jiangnan University, Wuxi 214122, People's Republic of China
| | - Qianqian Wu
- Engineering Research Center of IoT Technology Applications (Ministry of Education), Department of Electronic Engineering, Jiangnan University, Wuxi 214122, People's Republic of China
| | - Chenglin Wang
- Engineering Research Center of IoT Technology Applications (Ministry of Education), Department of Electronic Engineering, Jiangnan University, Wuxi 214122, People's Republic of China
| | - Xiumei Zhang
- Engineering Research Center of IoT Technology Applications (Ministry of Education), Department of Electronic Engineering, Jiangnan University, Wuxi 214122, People's Republic of China
| | - Zhengyang Cai
- Engineering Research Center of IoT Technology Applications (Ministry of Education), Department of Electronic Engineering, Jiangnan University, Wuxi 214122, People's Republic of China
| | - Liangliang Lin
- School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, People's Republic of China
| | - Xiaofeng Gu
- Engineering Research Center of IoT Technology Applications (Ministry of Education), Department of Electronic Engineering, Jiangnan University, Wuxi 214122, People's Republic of China
| | - Kostya Ken Ostrikov
- School of Physics and Chemistry and QUT Centre for Materials Science, Queensland University of Technology (QUT), Brisbane, Queensland 4000, Australia
| | - Haiyan Nan
- Engineering Research Center of IoT Technology Applications (Ministry of Education), Department of Electronic Engineering, Jiangnan University, Wuxi 214122, People's Republic of China
| | - Shaoqing Xiao
- Engineering Research Center of IoT Technology Applications (Ministry of Education), Department of Electronic Engineering, Jiangnan University, Wuxi 214122, People's Republic of China
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83
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Ramzan MS, Cocchi C. Strained Monolayer MoTe 2 as a Photon Absorber in the Telecom Range. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:2740. [PMID: 37887890 PMCID: PMC10608843 DOI: 10.3390/nano13202740] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2023] [Revised: 09/16/2023] [Accepted: 09/18/2023] [Indexed: 10/28/2023]
Abstract
To achieve the atomistic control of two-dimensional materials for emerging technological applications, such as valleytronics, spintronics, and single-photon emission, it is of paramount importance to gain an in-depth understanding of their structure-property relationships. In this work, we present a systematic analysis, carried out in the framework of density-functional theory, on the influence of uniaxial strain on the electronic and optical properties of monolayer MoTe2. By spanning a ±10% range of deformation along the armchair and zigzag direction of the two-dimensional sheet, we inspect how the fundamental gap, the dispersion of the bands, the frontier states, and the charge distribution are affected by strain. Under tensile strain, the system remains a semiconductor but a direct-to-indirect band gap transition occurs above 7%. Compressive strain, instead, is highly direction-selective. When it is applied along the armchair edge, the material remains a semiconductor, while along the zigzag direction a semiconductor-to-metal transition happens above 8%. The characteristics of the fundamental gap and wave function distribution are also largely dependent on the strain direction, as demonstrated by a thorough analysis of the band structure and of the charge density. Additional ab initio calculations based on many-body perturbation theory confirm the ability of strained MoTe2 to absorb radiation in the telecom range, thus suggesting the application of this material as a photon absorber upon suitable strain modulation.
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Affiliation(s)
| | - Caterina Cocchi
- Institut für Physik, Carl von Ossietzky Universität, 26129 Oldenburg, Germany
- Center for Nanoscale Dynamics (CeNaD), Carl von Ossietzky Universität, 26129 Oldenburg, Germany
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84
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Ghosh R, De M. Liposome-Based Antibacterial Delivery: An Emergent Approach to Combat Bacterial Infections. ACS OMEGA 2023; 8:35442-35451. [PMID: 37810644 PMCID: PMC10551917 DOI: 10.1021/acsomega.3c04893] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/08/2023] [Accepted: 09/08/2023] [Indexed: 10/10/2023]
Abstract
The continued emergence and spread of drug-resistant pathogens and the decline in the approval of new antimicrobial drugs pose a major threat to managing infectious diseases, resulting in high morbidity and mortality. Even though a significant variety of antibiotics can effectively cure many bacterial infectious diseases, microbial infections remain one of the biggest global health problems, which may be due to the traditional drug delivery system's shortcomings which lead to poor therapeutic index, low drug absorption, and numerous other drawbacks. Further, the use of traditional antibiotics to treat infectious diseases has always been accompanied by the emergence of multidrug resistance and adverse side effects. Despite developing numerous new antibiotics, nanomaterials, and various techniques to combat infectious diseases, they have persisted as major global health issues. Improving the current antibiotic delivery systems is a promising approach to solving many life-threatening infections. In this context, nanoliposomal systems have recently attracted much attention. Herein, we attempt to provide a concise summary of recent studies that have used liposomal nanoparticles as delivery systems for antibacterial medicines. The minireview also highlights the enormous potential of liposomal nanoparticles as antibiotic delivery systems. The future of these promising approaches lies in developing more efficient delivery systems by precisely targeting bacterial cells with antibiotics with minimum cytotoxicity and high bacterial combating efficacy.
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Affiliation(s)
- Rita Ghosh
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560012, Karnataka, India
| | - Mrinmoy De
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560012, Karnataka, India
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85
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Santos EJA, Giozza WF, de Souza Júnior RT, Nepomuceno Cavalcante NJ, Ribeiro Júnior LA, Lopes Lima KA. On the CO[Formula: see text] adsorption in a boron nitride analog for the recently synthesized biphenylene network: a DFT study. J Mol Model 2023; 29:327. [PMID: 37773546 DOI: 10.1007/s00894-023-05709-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Accepted: 08/28/2023] [Indexed: 10/01/2023]
Abstract
CONTEXT Recent advances in nanomaterial synthesis and characterization have led to exploring novel 2D materials. The biphenylene network (BPN) is a notable achievement in current fabrication efforts. Numerical studies have indicated the stability of its boron nitride counterpart, known as BN-BPN. In this study, we employ computational simulations to investigate the electronic and structural properties of pristine and doped BN-BPN monolayers upon CO[Formula: see text] adsorption. Our findings demonstrate that pristine BN-BPN layers exhibit moderate adsorption energies for CO[Formula: see text] molecules, approximately [Formula: see text]0.16 eV, indicating physisorption. However, introducing one-atom doping with silver, germanium, nickel, palladium, platinum, or silicon significantly enhances CO[Formula: see text] adsorption, leading to adsorption energies ranging from [Formula: see text]0.13 to [Formula: see text]0.65 eV. This enhancement indicates the presence of both physisorption and chemisorption mechanisms. BN-BPN does not show precise CO[Formula: see text] sensing and selectivity. Furthermore, our investigation of the recovery time for adsorbed CO[Formula: see text] molecules suggests that the interaction between BN-BPN and CO[Formula: see text] cannot modify the electronic properties of BN-BPN before the CO[Formula: see text] molecules escape. METHODS We performed density functional theory (DFT) simulations using the DMol3 code in the Biovia Materials Studio software. We incorporated Van der Waals corrections (DFT-D) within the Grimme scheme for an accurate representation. The exchange and correlation functions were treated using the Perdew-Burke-Ernzerhof (PBE) functional within the generalized gradient approximation (GGA). We used a double-zeta plus polarization (DZP) basis set to describe the electronic structure. Additionally, we accounted for the basis set superposition error (BSSE) through the counterpoise method. We included semicore DFT pseudopotentials to accurately model the interactions between the nuclei and valence electrons.
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Affiliation(s)
- Emanuel J A Santos
- Department of Physics, State University of Piauí, Teresina, Piauí, 64002-150, Brazil
| | - William F Giozza
- Faculty of Technology, Department of Electrical Engineering, University of Brasília, Brasília, Brazil
| | - Rafael T de Souza Júnior
- Faculty of Technology, Department of Electrical Engineering, University of Brasília, Brasília, Brazil
| | | | - Luiz A Ribeiro Júnior
- University of Brasilia, Institute of Physics, Brasília, 70910-900, Brazil.
- Computational Materials Laboratory, LCCMat, Institute of Physics, University of Brasília, Brasília, 70910-900, Brazil.
| | - Kleuton A Lopes Lima
- Department of Physics, State University of Piauí, Teresina, Piauí, 64002-150, Brazil
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86
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Martins DAF, Lima KA, Monteiro FF, Pereira ML, Ribeiro LA, Macedo-Filho A. Examining O[Formula: see text] adsorption on pristine and defective popgraphene sheets: A DFT study. J Mol Model 2023; 29:328. [PMID: 37773299 DOI: 10.1007/s00894-023-05692-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Accepted: 08/11/2023] [Indexed: 10/01/2023]
Abstract
CONTEXT Popgraphene (PopG) is a two-dimensional carbon-based material with fused pentagonal and octagonal rings. Like graphene, it exhibits a metallic band gap and exceptional thermal, dynamic, and mechanical stability. Here, we theoretically study the electronic and structural properties of PopG monolayers, including their doped and vacancy-endowed versions, as O[Formula: see text] adsorbers. Our findings show that pristine and vacancy-endowed PopG sheets have a comparable ability to adsorb O[Formula: see text] molecules, with adsorption energies ranging from [Formula: see text]0.57 to [Formula: see text]0.59 eV (physisorption). In these cases, octagonal rings play a dominant role in the adsorption mechanism. Platinum and Silicon doping enhance the O[Formula: see text] adsorption in areas close to the octagonal rings, resulting in adsorption energies ranging from [Formula: see text]1.13 to [Formula: see text]2.56 eV (chemisorption). Furthermore, we computed the recovery time for the adsorbed O[Formula: see text] molecules. The results suggest that PopG/O[Formula: see text] interaction in pristine and vacancy-endowed cases can change the PopG electronic properties before O[Formula: see text] diffusion. METHODS Density Functional Theory (DFT) simulations, with Van der Waals corrections (DFT-D, within the Grimme scheme), were performed to study the structural and electronic properties of PopG/O[Formula: see text] systems using the DMol3 code within the Biovia Materials Studio software. The exchange and correlation functions are treated within the generalized gradient approximation (GGA) as parameterized by Perdew-Burke-Ernzerhof (PBE) functional. We used the double-zeta plus polarization (DZP) for the basis set in these cases. We also considered the BSSE correction through the counterpoise method and the nuclei-valence electron interactions by including semi-core DFT pseudopotentials.
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Affiliation(s)
- David A F Martins
- Department of Physics, State University of Piauí, 64002-150, Teresina, Piauí, Brazil
| | - Kleuton A Lima
- Department of Physics, State University of Piauí, 64002-150, Teresina, Piauí, Brazil
| | - Fábio F Monteiro
- Institute of Physics, University of Brasilia, 70910-900, Brasília, Brazil
| | - Marcelo L Pereira
- University of Brasília, Faculty of Technology, Department of Electrical Engineering, 70910-900, Brasília, Brazil.
| | - Luiz A Ribeiro
- Institute of Physics, University of Brasilia, 70910-900, Brasília, Brazil
| | - Antonio Macedo-Filho
- Department of Physics, State University of Piauí, 64002-150, Teresina, Piauí, Brazil
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87
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Ghosh S, Pannone A, Sen D, Wali A, Ravichandran H, Das S. An all 2D bio-inspired gustatory circuit for mimicking physiology and psychology of feeding behavior. Nat Commun 2023; 14:6021. [PMID: 37758750 PMCID: PMC10533903 DOI: 10.1038/s41467-023-41046-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Accepted: 08/21/2023] [Indexed: 09/29/2023] Open
Abstract
Animal behavior involves complex interactions between physiology and psychology. However, most AI systems neglect psychological factors in decision-making due to a limited understanding of the physiological-psychological connection at the neuronal level. Recent advancements in brain imaging and genetics have uncovered specific neural circuits that regulate behaviors like feeding. By developing neuro-mimetic circuits that incorporate both physiology and psychology, a new emotional-AI paradigm can be established that bridges the gap between humans and machines. This study presents a bio-inspired gustatory circuit that mimics adaptive feeding behavior in humans, considering both physiological states (hunger) and psychological states (appetite). Graphene-based chemitransistors serve as artificial gustatory taste receptors, forming an electronic tongue, while 1L-MoS2 memtransistors construct an electronic-gustatory-cortex comprising a hunger neuron, appetite neuron, and feeding circuit. This work proposes a novel paradigm for emotional neuromorphic systems with broad implications for human health. The concept of gustatory emotional intelligence can extend to other sensory systems, benefiting future humanoid AI.
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Affiliation(s)
- Subir Ghosh
- Engineering Science and Mechanics, Penn State University, University Park, PA, 16802, USA
| | - Andrew Pannone
- Engineering Science and Mechanics, Penn State University, University Park, PA, 16802, USA
| | - Dipanjan Sen
- Engineering Science and Mechanics, Penn State University, University Park, PA, 16802, USA
| | - Akshay Wali
- Electrical Engineering, Penn State University, University Park, PA, 16802, USA
| | | | - Saptarshi Das
- Engineering Science and Mechanics, Penn State University, University Park, PA, 16802, USA.
- Electrical Engineering, Penn State University, University Park, PA, 16802, USA.
- Materials Science and Engineering, Penn State University, University Park, PA, 16802, USA.
- Materials Research Institute, Penn State University, University Park, PA, 16802, USA.
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88
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Loukopoulos S, Sakellis E, Kostakis MG, Gerokonstantis DT, Tsipas P, Gardelis S, Kontos AG, Katsaros FK, Sideratou Z, Romanos GE, Dimoulas A, Thomaidis NS, Likodimos V. Co-assembled MoS 2-TiO 2 Inverse Opal Photocatalysts for Visible Light-Activated Pharmaceutical Photodegradation. ACS OMEGA 2023; 8:33639-33650. [PMID: 37744818 PMCID: PMC10515384 DOI: 10.1021/acsomega.3c03881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Accepted: 08/18/2023] [Indexed: 09/26/2023]
Abstract
Heterostructured photocatalytic materials in the form of photonic crystals have been attracting attention for their unique light harvesting ability that can be ideally combined with judicious compositional modifications toward the development of visible light-activated (VLA) photonic catalysts, though practical environmental applications, such as the degradation of pharmaceutical emerging contaminants, have been rarely reported. Herein, heterostructured MoS2-TiO2 inverse opal films are introduced as highly active immobilized photocatalysts for the VLA degradation of tetracycline and ciprofloxacin broad-spectrum antibiotics as well as salicylic acid. A single-step co-assembly method was implemented for the challenging incorporation of MoS2 nanosheets into the nanocrystalline inverse opal walls. Compositional tuning and photonic band gap engineering of the MoS2-TiO2 photonic films showed that integration of low amounts of MoS2 nanosheets in the inverse opal framework maintains intact the periodic macropore structure and enhances the available surface area, resulting in efficient VLA antibiotic degradation far beyond the performance of benchmark TiO2 films. The combination of broadband MoS2 visible light absorption and photonic-assisted light trapping together with the enhanced charge separation that enables the generation of reactive oxygen species via firm interfacial coupling between MoS2 nanosheets and TiO2 nanoparticles is concluded as a competent approach for pharmaceutical abatement in water bodies.
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Affiliation(s)
- Stelios Loukopoulos
- Section
of Condensed Matter Physics, Department of Physics, National and Kapodistrian University of Athens, University Campus, Zografou, Athens 15784, Greece
| | - Elias Sakellis
- Institute
of Nanoscience and Nanotechnology, National
Center for Scientific Research “Demokritos”, Agia Paraskevi, Athens 15341, Greece
| | - Marios G. Kostakis
- Laboratory
of Analytical Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, University Campus, Zografou, Athens 15771, Greece
| | - Dimitrios-Triantafyllos Gerokonstantis
- Laboratory
of Analytical Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, University Campus, Zografou, Athens 15771, Greece
| | - Polychronis Tsipas
- Institute
of Nanoscience and Nanotechnology, National
Center for Scientific Research “Demokritos”, Agia Paraskevi, Athens 15341, Greece
| | - Spiros Gardelis
- Section
of Condensed Matter Physics, Department of Physics, National and Kapodistrian University of Athens, University Campus, Zografou, Athens 15784, Greece
| | - Athanassios G. Kontos
- Institute
of Nanoscience and Nanotechnology, National
Center for Scientific Research “Demokritos”, Agia Paraskevi, Athens 15341, Greece
- Department
of Physics, School of Applied Mathematical and Physical Sciences, National Technical University of Athens, Athens 15780, Greece
| | - Fotis K. Katsaros
- Institute
of Nanoscience and Nanotechnology, National
Center for Scientific Research “Demokritos”, Agia Paraskevi, Athens 15341, Greece
| | - Zili Sideratou
- Institute
of Nanoscience and Nanotechnology, National
Center for Scientific Research “Demokritos”, Agia Paraskevi, Athens 15341, Greece
| | - George Em. Romanos
- Institute
of Nanoscience and Nanotechnology, National
Center for Scientific Research “Demokritos”, Agia Paraskevi, Athens 15341, Greece
| | - Athanasios Dimoulas
- Institute
of Nanoscience and Nanotechnology, National
Center for Scientific Research “Demokritos”, Agia Paraskevi, Athens 15341, Greece
| | - Nikolaos S. Thomaidis
- Laboratory
of Analytical Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, University Campus, Zografou, Athens 15771, Greece
| | - Vlassis Likodimos
- Section
of Condensed Matter Physics, Department of Physics, National and Kapodistrian University of Athens, University Campus, Zografou, Athens 15784, Greece
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89
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Fu W, John M, Maddumapatabandi TD, Bussolotti F, Yau YS, Lin M, Johnson Goh KE. Toward Edge Engineering of Two-Dimensional Layered Transition-Metal Dichalcogenides by Chemical Vapor Deposition. ACS NANO 2023; 17:16348-16368. [PMID: 37646426 DOI: 10.1021/acsnano.3c04581] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
Abstract
The manipulation of edge configurations and structures in atomically-thin transition metal dichalcogenides (TMDs) for versatile functionalization has attracted intensive interest in recent years. The chemical vapor deposition (CVD) approach has shown promise for TMD edge engineering of atomic edge configurations (1H, 1T or 1T'-zigzag or armchair edges) as well as diverse edge morphologies (1D nanoribbons, 2D dendrites, 3D spirals, etc.). These edge-rich TMD layers offer versatile candidates for probing the physical and chemical properties and exploring potential applications in electronics, optoelectronics, catalysis, sensing, and quantum technologies. In this Review, we present an overview of the current state-of-the-art in the manipulation of TMD atomic edges and edge-rich structures using CVD. We highlight the vast range of distinct properties associated with these edge configurations and structures and provide insights into the opportunities afforded by such edge-functionalized crystals. The objective of this Review is to motivate further research and development efforts to use CVD as a scalable approach to harness the benefits of such crystal-edge engineering.
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Affiliation(s)
- Wei Fu
- Institute of Materials Research and Engineering (IMRE), Agency for Science Technology and Research (A*STAR), 2 Fusionopolis Way, Innovis #08-03 138634, Singapore
| | - Mark John
- Institute of Materials Research and Engineering (IMRE), Agency for Science Technology and Research (A*STAR), 2 Fusionopolis Way, Innovis #08-03 138634, Singapore
- Department of Physics, National University of Singapore, 2 Science Drive 3 117551, Singapore
| | - Thathsara D Maddumapatabandi
- Institute of Materials Research and Engineering (IMRE), Agency for Science Technology and Research (A*STAR), 2 Fusionopolis Way, Innovis #08-03 138634, Singapore
| | - Fabio Bussolotti
- Institute of Materials Research and Engineering (IMRE), Agency for Science Technology and Research (A*STAR), 2 Fusionopolis Way, Innovis #08-03 138634, Singapore
| | - Yong Sean Yau
- Institute of Materials Research and Engineering (IMRE), Agency for Science Technology and Research (A*STAR), 2 Fusionopolis Way, Innovis #08-03 138634, Singapore
| | - Ming Lin
- Institute of Materials Research and Engineering (IMRE), Agency for Science Technology and Research (A*STAR), 2 Fusionopolis Way, Innovis #08-03 138634, Singapore
| | - Kuan Eng Johnson Goh
- Institute of Materials Research and Engineering (IMRE), Agency for Science Technology and Research (A*STAR), 2 Fusionopolis Way, Innovis #08-03 138634, Singapore
- Department of Physics, National University of Singapore, 2 Science Drive 3 117551, Singapore
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 50 Nanyang Avenue 639798, Singapore
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90
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Chiu CH, Chen YT, Shen JL. Quantum dots derived from two-dimensional transition metal dichalcogenides: synthesis, optical properties and optoelectronic applications. NANOTECHNOLOGY 2023; 34:482001. [PMID: 37607498 DOI: 10.1088/1361-6528/acf29c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Accepted: 08/21/2023] [Indexed: 08/24/2023]
Abstract
Zero-dimensional transition metal dichalcogenides (TMD) quantum dots (QDs) have attracted a lot of attention due to their interesting fundamental properties and various applications. Compared to TMD monolayers, the QD counterpart exhibits larger values for direct transition energies, exciton binding energies, absorption coefficient, luminescence efficiency, and specific surface area. These characteristics make them useful in optoelectronic devices. In this review, recent exciting progress on synthesis, optical properties, and applications of TMD QDs is highlighted. The first part of this article begins with a brief description of the synthesis approaches, which focus on microwave-assistant heating and pulsed laser ablation methods. The second part introduces the fundamental optical properties of TMD QDs, including quantum confinement in optical absorption, excitation-wavelength-dependent photoluminescence, and many-body effects. These properties are highlighted. In the third part, we discuss lastest advancements in optoelectronic devices based on TMD QDs These devices include light-emitting diodes, solar cells, photodetectors, optical sensors, and light-controlled memory devices. Finally, a brief summary and outlook will be provided.
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Affiliation(s)
- Ching-Hsueh Chiu
- Department of Physics, Center for Nanotechnology, and Research Center for Crystalline Materials and Optoelectronic Characterization, Chung Yuan Christian University, Chung-Li, 320314, Taiwan
| | - Yu-Ting Chen
- Department of Physics, Center for Nanotechnology, and Research Center for Crystalline Materials and Optoelectronic Characterization, Chung Yuan Christian University, Chung-Li, 320314, Taiwan
| | - Ji-Lin Shen
- Department of Physics, Center for Nanotechnology, and Research Center for Crystalline Materials and Optoelectronic Characterization, Chung Yuan Christian University, Chung-Li, 320314, Taiwan
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91
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Yam KM, Zhang Y, Guo N, Jiang Z, Deng H, Zhang C. Two-dimensional graphitic metal carbides: structure, stability and electronic properties. NANOTECHNOLOGY 2023; 34:465706. [PMID: 37549662 DOI: 10.1088/1361-6528/acedb6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2023] [Accepted: 08/07/2023] [Indexed: 08/09/2023]
Abstract
Via first-principles computational modeling and calculations, we propose a new class of two-dimensional (2D) atomically thin crystals that contain metal-C3(MC3) moieties periodically distributed in a graphenic lattice, which we refer to as 2D graphitic metal carbides (g-MCs). Most g-MCs are dynamically stable as verified by the calculated phonon spectra. Our detailed chemical bonding analyzes reveal that the high stability of g-MCs can be attributed to a unique bonding feature, which manifests as the carbon-backbone-mediated metal-metal interactions. These analyzes provide new insights for understanding the stability of 2D materials. It is found that the calculated electronic band gaps and magnetic moments (per unit cell) of g-MCs can range from 0 to 1.30 eV and 0 to 4.40μB, respectively. Highly tunable electronic properties imply great potential of 2D g-MCs in various applications. As an example, we show that 2D g-MnC can be an excellent electrocatalyst towards CO2reductive reaction for the formation of formic acid with an exceptionally high loading of Mn atoms (∼43 wt%). We expect this work to simulate new experiments for fabrication and applications of g-MCs.
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Affiliation(s)
- Kah-Meng Yam
- Department of Physics, National University of Singapore, 2 Science Drive 3 117551, Singapore
- Department of Chemistry, National University of Singapore, 3 Science Drive 3 117543, Singapore
| | - Yongjie Zhang
- Department of Physics, National University of Singapore, 2 Science Drive 3 117551, Singapore
- Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, People's Republic of China
| | - Na Guo
- NUS (Chongqing) Research Institute, No. 16 South Huashan Road, 401123, Chongqing, People's Republic of China
| | - Zhuoling Jiang
- Department of Physics, National University of Singapore, 2 Science Drive 3 117551, Singapore
| | - Hui Deng
- Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, People's Republic of China
| | - Chun Zhang
- Department of Physics, National University of Singapore, 2 Science Drive 3 117551, Singapore
- Department of Chemistry, National University of Singapore, 3 Science Drive 3 117543, Singapore
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92
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Sangolkar AA, Kadiyam RK, Faizan M, Chedupaka O, Mucherla R, Pawar R. Electronic and photophysical properties of an atomically thin bowl-shaped beryllene encapsulated inside the cavity of [6]cycloparaphenylene (Be n@[6]CPP). Phys Chem Chem Phys 2023; 25:23262-23276. [PMID: 37608746 DOI: 10.1039/d3cp01952g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/24/2023]
Abstract
Exotic metallic nanostructures are being intensely pursued for a myriad of applications, with ultrathin membranes currently at the heart of several investigations. The objective of the present study was to systematically assess the atom-by-atom encapsulation of Be in the molecular nanoring of [6]cycloparaphenylene ([6]CPP). Further, the study aimed to scrutinize the structure, stability, and properties of the encapsulated Ben@[6]CPP systems. The outcomes clearly revealed that [6]CPP enabled the cooperative confinement of atomically thin bowl-shaped beryllene inside its circular cavity. The confinement of Be in [6]CPP generated topologically anisotropic surfaces with distinct interior and exterior charge distributions. The Ben@[6]CPP complexes could render a cationic or anionic nature to Be depending on its neighbouring environment. Thus, the systems may offer a promising opportunity for the synergistic co-adsorption of multiple reactants that are involved in multicomponent reactions. Energy decomposition analysis (EDA) elucidated that the bonding between Be and [6]CPP was partially ionic and covalent in character. The progressive encapsulation of Be atoms inside the cavity of [6]CPP led to a red-shift of the excitation wavelength to the visible region. The calculated optical absorption coefficient was higher than 104 L mol-1 cm-1, which shows promise for diverse optoelectronic applications.
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Affiliation(s)
- Akanksha Ashok Sangolkar
- Laboratory of Advanced Computation and Theory for Materials and Chemistry, Department of Chemistry, National Institute of Technology Warangal (NITW), Warangal, Telangana-506004, India.
| | - Rama Krishna Kadiyam
- Laboratory of Advanced Computation and Theory for Materials and Chemistry, Department of Chemistry, National Institute of Technology Warangal (NITW), Warangal, Telangana-506004, India.
| | - Mohmmad Faizan
- Laboratory of Advanced Computation and Theory for Materials and Chemistry, Department of Chemistry, National Institute of Technology Warangal (NITW), Warangal, Telangana-506004, India.
| | - Omshireesh Chedupaka
- Laboratory of Advanced Computation and Theory for Materials and Chemistry, Department of Chemistry, National Institute of Technology Warangal (NITW), Warangal, Telangana-506004, India.
| | - Raghasudha Mucherla
- Laboratory of Advanced Computation and Theory for Materials and Chemistry, Department of Chemistry, National Institute of Technology Warangal (NITW), Warangal, Telangana-506004, India.
| | - Ravinder Pawar
- Laboratory of Advanced Computation and Theory for Materials and Chemistry, Department of Chemistry, National Institute of Technology Warangal (NITW), Warangal, Telangana-506004, India.
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93
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Yang K, Yang X, Liu Z, Zhang R, Yue Y, Wang F, Li K, Shi X, Yuan J, Liu N, Wang Z, Wang G, Xin G. Scalable microfluidic fabrication of vertically aligned two-dimensional nanosheets for superior thermal management. MATERIALS HORIZONS 2023; 10:3536-3547. [PMID: 37272086 DOI: 10.1039/d3mh00615h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Two-dimensional (2D) nanosheets have been assembled into various macroscopic structures for wide engineering applications. To fully explore their exceptional thermal, mechanical, and electrical properties, 2D nanosheets must be aligned into highly ordered structures due to their strong structural anisotropy. Structures stacked layer by layer such as films and fibers have been readily assembled from 2D nanosheets due to their planar geometry. However, scalable manufacturing of macroscopic structures with vertically aligned 2D nanosheets remains challenging, given their large lateral size with a thickness of only a few nanometers. Herein, we report a scalable and efficient microfluidics-enabled sheet-aligning process to assemble 2D nanosheets into a large-area film with a highly ordered vertical alignment. By applying microchannels with a high aspect ratio, 2D nanosheets were well aligned vertically under strong channel size confinement and high flow shear stress. A vertically aligned graphene sheet film was obtained and applied to effectively improve the heat transfer of thermal interfacial materials (TIMs). Superior through-plane thermal conductivity of 82.7 W m-1 K-1 at a low graphene content of 11.8 vol% was measured for vertically aligned TIMs. Thus, they demonstrate exceptional thermal management performance for switching power supplies with high reliability.
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Affiliation(s)
- Kai Yang
- Wuhan National High Magnetic Field Center and School of Materials Science & Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
| | - Xiaoran Yang
- Wuhan National High Magnetic Field Center and School of Materials Science & Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
| | - Zexin Liu
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Rong Zhang
- Wuhan National High Magnetic Field Center and School of Materials Science & Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
| | - Yue Yue
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Fanfan Wang
- Wuhan National High Magnetic Field Center and School of Materials Science & Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
| | - Kangyong Li
- Wuhan National High Magnetic Field Center and School of Materials Science & Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
| | - Xiaojie Shi
- School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
| | - Jun Yuan
- Department of Integrated Power Systems and Device Technology, Hubei Jiufengshan Laboratory, Wuhan 430206, China
| | - Ningyu Liu
- Department of Integrated Power Systems and Device Technology, Hubei Jiufengshan Laboratory, Wuhan 430206, China
| | - Zhiqiang Wang
- School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
| | - Gongkai Wang
- School of Material Science and Engineering, Research Institute for Energy Equipment Materials, Hebei University of Technology, Tianjin, 300130, China.
| | - Guoqing Xin
- Wuhan National High Magnetic Field Center and School of Materials Science & Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
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94
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Jeon M, Kim M, Lee JS, Kim H, Choi SJ, Moon HR, Kim J. Computational Prediction of Stacking Mode in Conductive Two-Dimensional Metal-Organic Frameworks: An Exploration of Chemical and Electrical Property Changes. ACS Sens 2023; 8:3068-3075. [PMID: 37524053 DOI: 10.1021/acssensors.3c00715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/02/2023]
Abstract
Conductive two-dimensional metal-organic frameworks (2D MOFs) have attracted interest as they induce strong charge delocalization and improve charge carrier mobility and concentration. However, characterizing their stacking mode depends on expensive and time-consuming experimental measurements. Here, we construct a potential energy surface (PES) map database for 36 2D MOFs using density functional theory (DFT) for the experimentally synthesized and non-synthesized 2D MOFs to predict their stacking mode. The DFT PES results successfully predict the experimentally synthesized stacking mode with an accuracy of 92.9% and explain the coexistence mechanism of dual stacking modes in a single compound. Furthermore, we analyze the chemical (i.e., host-guest interaction) and electrical (i.e., electronic structure) property changes affected by stacking mode. The DFT results show that the host-guest interaction can be enhanced by the transition from AA to AB stacking, taking H2S gas as a case study. The electronic band structure calculation confirms that as AB stacking displacement increases, the in-plane charge transport pathway is reduced while the out-of-plane charge transport pathway is maintained or even increased. These results indicate that there is a trade-off between chemical and electrical properties in accordance with the stacking mode.
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Affiliation(s)
- Mingyu Jeon
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Minhyuk Kim
- Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Joon-Seok Lee
- Division of Materials of Science and Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea
| | - Honghui Kim
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Seon-Jin Choi
- Division of Materials of Science and Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea
- Institute of Nano Science and Technology, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea
| | - Hoi Ri Moon
- Department of Chemistry and Nano Science, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, Republic of Korea
| | - Jihan Kim
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
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95
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Jaiswal S, Fathi-Hafshejani P, Yakupoglu B, Boebinger MG, Azam N, Unocic RR, Hamilton MC, Mahjouri-Samani M. Wafer-Scale Synthesis of 2D Materials by an Amorphous Phase-Mediated Crystallization Approach. ACS APPLIED MATERIALS & INTERFACES 2023; 15:39697-39706. [PMID: 37579298 DOI: 10.1021/acsami.3c06009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/16/2023]
Abstract
The interest in the wafer-scale growth of two-dimensional (2D) materials, including transition metal dichalcogenides (TMDCs), has been rising for transitioning from lab-scale devices to commercial-scale systems. Among various synthesis techniques, physical vapor deposition, such as pulsed laser deposition (PLD), has shown promise for the wafer-scale growth of 2D materials. However, due to the high volatility of chalcogen atoms (e.g., S and Se), films deposited by PLD usually suffer from a lack of stoichiometry and chalcogen deficiency. To mitigate this issue, excess chalcogen is necessary during the deposition, which results in problems like uniformity or not being repeatable. This study demonstrates a condensed-phase or amorphous phase-mediated crystallization (APMC) approach for the wafer-scale synthesis of 2D materials. This method uses a room-temperature PLD process for the deposition and formation of amorphous precursors with controlled thicknesses, followed by a post-deposition crystallization process to convert the amorphous materials to crystalline structures. This approach maintains the stoichiometry of the deposited materials throughout the deposition and crystallization process and enables the large-scale synthesis of crystalline 2D materials (e.g., MoS2 and WSe2) on Si/SiO2 substrates, which is critical for future wafer-scale electronics. We show that the thickness of the layers can be digitally controlled by the number of laser pulses during the PLD phase. Optical spectroscopy is used to monitor the crystallization dynamics of amorphous layers as a function of annealing temperature. The crystalline quality, domain sizes, and the number of layers were explored using nanoscale and atomistic characterization (e.g., AFM, STEM, and EDS) along with electrical characterization to explore process-structure-performance relationships. This growth technique is a promising method that could potentially be adopted in conventional semiconductor industries for wafer-scale manufacturing of next-generation electronic and optoelectronic devices.
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Affiliation(s)
- Suman Jaiswal
- Department of Electrical and Computer Engineering, Auburn University, Auburn, Alabama 36849, United States
| | - Parvin Fathi-Hafshejani
- Department of Electrical and Computer Engineering, Auburn University, Auburn, Alabama 36849, United States
| | - Baha Yakupoglu
- Department of Electrical and Computer Engineering, Auburn University, Auburn, Alabama 36849, United States
| | - Matthew G Boebinger
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Nurul Azam
- Department of Electrical and Computer Engineering, Auburn University, Auburn, Alabama 36849, United States
| | - Raymond R Unocic
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Michael C Hamilton
- Department of Electrical and Computer Engineering, Auburn University, Auburn, Alabama 36849, United States
| | - Masoud Mahjouri-Samani
- Department of Electrical and Computer Engineering, Auburn University, Auburn, Alabama 36849, United States
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96
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Wang K, Ren K, Hou Y, Cheng Y, Zhang G. Magnon-phonon coupling: from fundamental physics to applications. Phys Chem Chem Phys 2023; 25:21802-21815. [PMID: 37581291 DOI: 10.1039/d3cp02683c] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/16/2023]
Abstract
In recent decades, there are immense applications for bulk and few-layer magnetic insulators in biomedicine, data storage, and signal transfer. In these applications, the interaction between spin and lattice vibration has significant impacts on the device performance. In this article, we systematically review the fundamental physical aspects of magnon-phonon coupling in magnetic insulators. We first introduce the fundamental physics of magnons and magnon-phonon coupling in magnetic insulators and then discuss the influence of magnon-phonon coupling on the properties of magnons and phonons. Finally, a summary is presented, and we also discuss the possible open problems in this field. This article presents the advanced understanding of magnon-phonon coupling in magnetic insulators, which provides new opportunities for improving various possible applications.
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Affiliation(s)
- Ke Wang
- School of Automation, Xi'an University of Posts and Telecommunications, Shaanxi, 710121, China
- Monash Suzhou Research Institute, Monash University, Suzhou Industrial Park, Suzhou 215000, PR China.
| | - Kai Ren
- School of Mechanical and Electronic Engineering, Nanjing Forestry University, Nanjing, Jiangsu 210042, China
| | - Yinlong Hou
- School of Automation, Xi'an University of Posts and Telecommunications, Shaanxi, 710121, China
| | - Yuan Cheng
- Monash Suzhou Research Institute, Monash University, Suzhou Industrial Park, Suzhou 215000, PR China.
- Department of Materials Science and Engineering, Monash University, VIC 3800, Australia
| | - Gang Zhang
- Institute of High Performance Computing, A*STAR, 138632, Singapore.
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97
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Wei H, Yang L, Pang C, Lian L, Hong L. Bacteria-targeted photothermal therapy for combating drug-resistant bacterial infections. Biomater Sci 2023; 11:5634-5640. [PMID: 37404189 DOI: 10.1039/d3bm00841j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/06/2023]
Abstract
Photothermal therapy is an ideal non-invasive treatment for bacterial infections. However, if photothermal agents are unable to target bacteria, they can also cause thermal damage to healthy tissue. This study describes the fabrication of a Ti3C2Tx MXene-based photothermal nanobactericide (denoted as MPP) that targets bacteria by modifying MXene nanosheets with polydopamine and the bacterial recognition peptide CAEKA. The polydopamine layer blunts the sharp edges of MXene nanosheets, preventing their damage to normal tissue cells. Furthermore, as a constituent of peptidoglycan, CAEKA can recognize and penetrate the bacterial cell membrane based on similar compatibility. The obtained MPP exhibits superior antibacterial activity and high cytocompatibility compared to the pristine MXene nanosheets. In vivo studies showed that MPP colloidal solution under 808 nm NIR light can effectively treat a subcutaneous abscess caused by multi-drug resistant bacterial infection without adverse effects.
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Affiliation(s)
- Hongxin Wei
- Faculty of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, P. R. China.
| | - Liu Yang
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, P. R. China
| | - Chuming Pang
- Faculty of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, P. R. China.
| | - Liqin Lian
- Faculty of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, P. R. China.
| | - Liangzhi Hong
- Faculty of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, P. R. China.
- Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, South China University of Technology, Guangzhou 510640, P. R. China
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98
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Xia Y, Zha J, Huang H, Wang H, Yang P, Zheng L, Zhang Z, Yang Z, Chen Y, Chan HP, Ho JC, Tan C. Uncovering the Role of Crystal Phase in Determining Nonvolatile Flash Memory Device Performance Fabricated from MoTe 2-Based 2D van der Waals Heterostructures. ACS APPLIED MATERIALS & INTERFACES 2023; 15:35196-35205. [PMID: 37459597 DOI: 10.1021/acsami.3c06316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/28/2023]
Abstract
Although the crystal phase of two-dimensional (2D) transition metal dichalcogenides (TMDs) has been proven to play an essential role in fabricating high-performance electronic devices in the past decade, its effect on the performance of 2D material-based flash memory devices still remains unclear. Here, we report the exploration of the effect of MoTe2 in different phases as the charge-trapping layer on the performance of 2D van der Waals (vdW) heterostructure-based flash memory devices, where a metallic 1T'-MoTe2 or semiconducting 2H-MoTe2 nanoflake is used as the floating gate. By conducting comprehensive measurements on the two kinds of vdW heterostructure-based devices, the memory device based on MoS2/h-BN/1T'-MoTe2 presents much better performance, including a larger memory window, faster switching speed (100 ns), and higher extinction ratio (107), than that of the device based on the MoS2/h-BN/2H-MoTe2 heterostructure. Moreover, the device based on the MoS2/h-BN/1T'-MoTe2 heterostructure also shows a long cycle (>1200 cycles) and retention (>3000 s) stability. Our study clearly demonstrates that the crystal phase of 2D TMDs has a significant impact on the performance of nonvolatile flash memory devices based on 2D vdW heterostructures, which paves the way for the fabrication of future high-performance memory devices based on 2D materials.
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Affiliation(s)
- Yunpeng Xia
- Department of Electrical Engineering, City University of Hong Kong, Kowloon 999077, Hong Kong SAR, China
| | - Jiajia Zha
- Department of Materials Science and Engineering, City University of Hong Kong, Kowloon 999077, Hong Kong SAR, China
| | - Haoxin Huang
- Department of Electrical Engineering, City University of Hong Kong, Kowloon 999077, Hong Kong SAR, China
| | - Huide Wang
- Department of Electrical Engineering, City University of Hong Kong, Kowloon 999077, Hong Kong SAR, China
- Department of Materials Science and Engineering, City University of Hong Kong, Kowloon 999077, Hong Kong SAR, China
| | - Peng Yang
- College of Integrated Circuits and Optoelectronic Chips, Shenzhen Technology University, Shenzhen 518118, China
| | - Long Zheng
- Department of Chemistry, The Chinese University of Hong Kong, Shatin 999077, Hong Kong SAR, China
| | - Zhuomin Zhang
- Department of Mechanical Engineering, City University of Hong Kong, Kowloon 999077, Hong Kong SAR, China
| | - Zhengbao Yang
- Department of Mechanical Engineering, City University of Hong Kong, Kowloon 999077, Hong Kong SAR, China
- Department of Mechanical and Aerospace Engineering, Hong Kong University of Science and Technology, Kowloon 999077, Hong Kong SAR, China
| | - Ye Chen
- Department of Chemistry, The Chinese University of Hong Kong, Shatin 999077, Hong Kong SAR, China
| | - Hau Ping Chan
- Department of Electrical Engineering, City University of Hong Kong, Kowloon 999077, Hong Kong SAR, China
| | - Johnny C Ho
- Department of Materials Science and Engineering, City University of Hong Kong, Kowloon 999077, Hong Kong SAR, China
| | - Chaoliang Tan
- Department of Electrical Engineering, City University of Hong Kong, Kowloon 999077, Hong Kong SAR, China
- Department of Chemistry and Center of Super-Diamond and Advanced Films (COSDAF), City University of Hong Kong, Kowloon 999077, Hong Kong SAR, China
- Department of Electrical and Electronic Engineering, The University of Hong Kong, Pokfulam 999077, Hong Kong SAR, China
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99
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Marques-Moros F, Boix-Constant C, Mañas-Valero S, Canet-Ferrer J, Coronado E. Interplay between Optical Emission and Magnetism in the van der Waals Magnetic Semiconductor CrSBr in the Two-Dimensional Limit. ACS NANO 2023; 17:13224-13231. [PMID: 37442121 PMCID: PMC10863932 DOI: 10.1021/acsnano.3c00375] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Accepted: 07/06/2023] [Indexed: 07/15/2023]
Abstract
The van der Waals semiconductor metamagnet CrSBr offers an ideal platform for studying the interplay between optical and magnetic properties in the two-dimensional limit. Here, we carried out an exhaustive optical characterization of this material by means of temperature- and magnetic-field-dependent photoluminescence (PL) on flakes of different thicknesses down to the monolayer. We found a characteristic emission peak that is quenched upon switching the ferromagnetic layers from an antiparallel to a parallel configuration and exhibits a temperature dependence different from that of the peaks commonly ascribed to excitons. The contribution of this peak to the PL is boosted around 30-40 K, coinciding with the hidden order magnetic transition temperature. Our findings reveal the connection between the optical and magnetic properties via the ionization of magnetic donor vacancies. This behavior enables a useful tool for the optical reading of the magnetic states in atomically thin layers of CrSBr and shows the potential of the design of 2D heterostructures with magnetic and excitonic properties.
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Affiliation(s)
| | - Carla Boix-Constant
- Instituto de Ciencia Molecular
(ICMol), Universitat de València, 46980, Paterna, Spain
| | - Samuel Mañas-Valero
- Instituto de Ciencia Molecular
(ICMol), Universitat de València, 46980, Paterna, Spain
| | - Josep Canet-Ferrer
- Instituto de Ciencia Molecular
(ICMol), Universitat de València, 46980, Paterna, Spain
| | - Eugenio Coronado
- Instituto de Ciencia Molecular
(ICMol), Universitat de València, 46980, Paterna, Spain
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100
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Hill B, Abraham S, Akhtar A, Selvaggio G, Tschulik K, Kruss S. Surfactant assisted exfoliation of near infrared fluorescent silicate nanosheets. RSC Adv 2023; 13:20916-20925. [PMID: 37441047 PMCID: PMC10334366 DOI: 10.1039/d3ra04083f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2023] [Accepted: 07/03/2023] [Indexed: 07/15/2023] Open
Abstract
Fluorophores that emit light in the near infrared (NIR) are advantageous in photonics and imaging due to minimal light scattering, absorption, phototoxicity and autofluorescence in this spectral region. The layered silicate Egyptian blue (CaCuSi4O10) emits as a bulk material bright and stable fluorescence in the NIR and is a promising NIR fluorescent material for (bio)photonics. Here, we demonstrate a surfactant-based (mild) exfoliation procedure to produce nanosheets (EB-NS) of high monodispersity, heights down to 1 nm and diameters <20 nm in large quantities. The approach combines planetary ball milling, surfactant assisted bath sonication and centrifugation steps. It avoids the impurities that are typical for the harsh conditions of tip-sonication. Several solvents and surfactants were tested and we found the highest yield for sodium dodecyl benzyl sulfate (SDBS) and water. The NIR fluorescence emission (λem ≈ 930-940 nm) is not affected by this procedure, is extremely stable and is not affected by quenchers. This enables the use of EB-NS for macroscopic patterning/barcoding of materials in the NIR. In summary, we present a simple and mild route to NIR fluorescent nanosheets that promise high potential as NIR fluorophores for optical applications.
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Affiliation(s)
- Bjoern Hill
- Department of Chemistry, Ruhr Universität Bochum 44801 Bochum Germany
| | - Smitha Abraham
- Department of Chemistry, Ruhr Universität Bochum 44801 Bochum Germany
| | - Anas Akhtar
- Analytical Chemistry II, Ruhr Universität Bochum 44801 Bochum
| | | | | | - Sebastian Kruss
- Department of Chemistry, Ruhr Universität Bochum 44801 Bochum Germany
- Fraunhofer Institute for Microelectronic Circuits and Systems 47057 Duisburg Germany
- Center for Nanointegration Duisburg-Essen (CENIDE) 47057 Duisburg Germany
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