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Gao H, Wang Z, Cao J, Lin YC, Ling X. Advancing Nanoelectronics Applications: Progress in Non-van der Waals 2D Materials. ACS NANO 2024; 18:16343-16358. [PMID: 38899467 DOI: 10.1021/acsnano.4c01177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/21/2024]
Abstract
Extending the inventory of two-dimensional (2D) materials remains highly desirable, given their excellent properties and wide applications. Current studies on 2D materials mainly focus on the van der Waals (vdW) materials since the discovery of graphene, where properties of atomically thin layers have been found to be distinct from their bulk counterparts. Beyond vdW materials, there are abundant non-vdW materials that can also be thinned down to 2D forms, which are still in their early stage of exploration. In this review, we focus on the downscaling of non-vdW materials into 2D forms to enrich the 2D materials family. This underexplored group of 2D materials could show potential promise in many areas such as electronics, optics, and magnetics, as has happened in the vdW 2D materials. Hereby, we will focus our discussion on their electronic properties and applications of them. We aim to motivate and inspire fellow researchers in the 2D materials community to contribute to the development of 2D materials beyond the widely studied vdW layered materials for electronic device applications. We also give our insights into the challenges and opportunities to guide researchers who are desirous of working in this promising research area.
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Affiliation(s)
- Hongze Gao
- Department of Chemistry, Boston University 590 Commonwealth Avenue, Boston, Massachusetts 02215, United States
| | - Zifan Wang
- Department of Chemistry, Boston University 590 Commonwealth Avenue, Boston, Massachusetts 02215, United States
| | - Jun Cao
- Department of Chemistry, Boston University 590 Commonwealth Avenue, Boston, Massachusetts 02215, United States
| | - Yuxuan Cosmi Lin
- Department of Materials Science and Engineering, Texas A&M University 575 Ross Street, College Station, Texas 77843, United States
| | - Xi Ling
- Department of Chemistry, Boston University 590 Commonwealth Avenue, Boston, Massachusetts 02215, United States
- Division of Materials Science and Engineering, Boston University 15 St Mary's Street, Boston, Massachusetts 02215, United States
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2
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Sahoo RC, Sahoo P, Mohanta MK, Jena P, Matte HSSR. Solution Processing of Spinel Nickel Cobaltite: Exfoliation Mechanism, Dispersion Stability, and Applications. Inorg Chem 2024; 63:7838-7847. [PMID: 38635967 DOI: 10.1021/acs.inorgchem.4c00430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/20/2024]
Abstract
The exfoliation of nonlayered materials to mono- or few-layers is of growing interest to realize their full potential for various applications. Nickel cobaltite (NiCo2O4), which has a spinel crystal structure, is one such nonlayered material with unique properties and has been utilized in a wide range of applications. Herein, NiCo2O4 is synthesized from NiCo2- Layered double hydroxides using a topochemical conversion technique. Subsequently, bulk NiCo2O4 is exfoliated into mono- or few-layer nickel cobaltene nanosheets using liquid-phase exfoliation in various low-boiling point solvents. An analytical centrifuge technique is also utilized to understand the solute-solvent interactions by determining their dispersion stability using parameters such as the instability index and sedimentation velocity. Among the studied solvents, water/isopropyl alcohol cosolvent is found to have better dispersion stability. In addition, density functional theory calculations are carried out to understand the exfoliation mechanism. It is found that the surface termination arising from the Co-O bond needs the least energy for exfoliation. Furthermore, the obtained nickel cobaltene nanosheets are utilized as an active material for supercapacitors without any conductive additives or binders. A solid-state symmetric supercapacitor delivers a specific capacitance of 10.2 mF cm-2 with robust stability, retaining ∼98% capacitance after 4000 cycles.
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Affiliation(s)
- Ramesh Chandra Sahoo
- Energy Materials Laboratory, Centre for Nano and Soft Matter Sciences, Bangalore 562162, India
- Manipal Academy of Higher Education (MAHE), Manipal 576104, India
| | - Priyabrata Sahoo
- Energy Materials Laboratory, Centre for Nano and Soft Matter Sciences, Bangalore 562162, India
- Manipal Academy of Higher Education (MAHE), Manipal 576104, India
| | - Manish Kumar Mohanta
- Department of Physics, Virginia Commonwealth University, Richmond, Virginia 23284, United States
| | - Puru Jena
- Department of Physics, Virginia Commonwealth University, Richmond, Virginia 23284, United States
| | - H S S Ramakrishna Matte
- Energy Materials Laboratory, Centre for Nano and Soft Matter Sciences, Bangalore 562162, India
- Manipal Academy of Higher Education (MAHE), Manipal 576104, India
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3
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Barnowsky T, Curtarolo S, Krasheninnikov AV, Heine T, Friedrich R. Magnetic State Control of Non-van der Waals 2D Materials by Hydrogenation. NANO LETTERS 2024; 24:3874-3881. [PMID: 38446590 PMCID: PMC10996018 DOI: 10.1021/acs.nanolett.3c04777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 02/15/2024] [Accepted: 02/15/2024] [Indexed: 03/08/2024]
Abstract
Controlling the magnetic state of two-dimensional (2D) materials is crucial for spintronics. By employing data-mining and autonomous density functional theory calculations, we demonstrate the switching of magnetic properties of 2D non-van der Waals materials upon hydrogen passivation. The magnetic configurations are tuned to states with flipped and enhanced moments. For 2D CdTiO3─a diamagnetic compound in the pristine case─we observe an onset of ferromagnetism upon hydrogenation. Further investigation of the magnetization density of the pristine and passivated systems provides a detailed analysis of modified local spin symmetries and the emergence of ferromagnetism. Our results indicate that selective surface passivation is a powerful tool for tailoring magnetic properties of nanomaterials, such as non-vdW 2D compounds.
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Affiliation(s)
- Tom Barnowsky
- Theoretical
Chemistry, Technische Universität
Dresden, Dresden 01062, Germany
- Institute
of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, Dresden 01328, Germany
| | - Stefano Curtarolo
- Center
for Extreme Materials, Duke University, Durham, North Carolina 27708, United States
- Materials
Science, Electrical Engineering, and Physics, Duke University, Durham, North Carolina 27708, United States
| | - Arkady V. Krasheninnikov
- Institute
of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, Dresden 01328, Germany
| | - Thomas Heine
- Theoretical
Chemistry, Technische Universität
Dresden, Dresden 01062, Germany
- Center
for Advanced Systems Understanding (CASUS), Helmholtz-Zentrum Dresden-Rossendorf, Görlitz 02826, Germany
| | - Rico Friedrich
- Theoretical
Chemistry, Technische Universität
Dresden, Dresden 01062, Germany
- Institute
of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, Dresden 01328, Germany
- Center
for Extreme Materials, Duke University, Durham, North Carolina 27708, United States
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4
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Friedrich R, Curtarolo S. AFLOW-CCE for the thermodynamics of ionic materials. J Chem Phys 2024; 160:042501. [PMID: 38276957 DOI: 10.1063/5.0184917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Accepted: 12/25/2023] [Indexed: 01/27/2024] Open
Abstract
Accurate thermodynamic stability predictions enable data-driven computational materials design. Standard density functional theory (DFT) approximations have limited accuracy with average errors of a few hundred meV/atom for ionic materials, such as oxides and nitrides. Thus, insightful correction schemes as given by the coordination corrected enthalpies (CCE) method, based on an intuitive parametrization of DFT errors with respect to coordination numbers and cation oxidation states, present a simple, yet accurate solution to enable materials stability assessments. Here, we illustrate the computational capabilities of our AFLOW-CCE software by utilizing our previous results for oxides and introducing new results for nitrides. The implementation reduces the deviations between theory and experiment to the order of the room temperature thermal energy scale, i.e., ∼25 meV/atom. The automated corrections for both materials classes are freely available within the AFLOW ecosystem via the AFLOW-CCE module, requiring only structural inputs.
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Affiliation(s)
- Rico Friedrich
- Theoretical Chemistry, Technische Universität Dresden, 01062 Dresden, Germany
- Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany
- Center for Autonomous Materials Design, Duke University, Durham, North Carolina 27708, USA
| | - Stefano Curtarolo
- Center for Autonomous Materials Design, Duke University, Durham, North Carolina 27708, USA
- Materials Science, Electrical Engineering, and Physics, Duke University, Durham, North Carolina 27708, USA
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5
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Zhang S, Huo S, Song X, Zhang X. Surface Stability and Exfoliability of Non-van der Waals Magnetic Chromium Tellurides. J Phys Chem Lett 2023; 14:10609-10616. [PMID: 37982382 DOI: 10.1021/acs.jpclett.3c02439] [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
Exfoliation of two-dimensional (2D) magnetic materials from non-van der Waals (non-vdW) materials has attracted increasing attention because it provides a great platform for the construction of 2D magnetic materials. For non-vdW magnetic chromium tellurides with high Curie temperatures, their few-layer samples show promising applications in the field of spintronics. However, there is still no consensus on whether the surface structures of few-layer chromium tellurides should be terminated by Cr or Te atoms. By calculating the surface and exfoliation energy, we find that which structure is more stable depends greatly on the value of the chemical potential of Te atoms, and the few-layer sample with a Cr-terminated surface is easier to exfoliate than that with both Te-terminated surfaces. Finally, we propose that different exfoliated structures can be identified by using the atomic number ratio of Cr to Te and the average magnetic moment of Cr atoms in few-layer samples.
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Affiliation(s)
- Shuqing Zhang
- Institute of Information Photonics Technology, Faculty of Science, Beijing University of Technology, Beijing 100124, China
| | - Sitong Huo
- Institute of Information Photonics Technology, Faculty of Science, Beijing University of Technology, Beijing 100124, China
| | - Xiaoyan Song
- Faculty of Materials and Manufacturing, Key Laboratory of Advanced Functional Materials, Education Ministry of China, Beijing University of Technology, Beijing 100124, China
| | - Xinping Zhang
- Institute of Information Photonics Technology, Faculty of Science, Beijing University of Technology, Beijing 100124, China
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6
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Sukhanova EV, Popov ZI. Band alignment type I, II transformations in Hf 2CO 2/MoS 2 heterostructures using biaxial strain, external electric field, and interlayer coupling: a first principal investigation. Phys Chem Chem Phys 2023; 25:32062-32070. [PMID: 37982202 DOI: 10.1039/d3cp04546c] [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
The transition to neuromorphic devices is relevant to the development of materials capable of providing electronic switching in response to external stimuli. In the present work, the Hf2CO2/MoS2 heterostructure under biaxial strain, interlayer coupling, and an electric field was investigated by first-principles calculations based on density functional theory. We have shown that the influence of lateral deformation as well as the perpendicular external electric field is more significant compared to the influence of external vertical pressure on changes in the heterojunction type of heterostructure. The lateral stretching leads to a type-I and lateral compression results in a type-II heterojunction, and an external electric field also has an effect on heterojunction type. The combination of these impacts can tune the Hf2CO2/MoS2 heterostructure. The current work suggests a compelling way to make type-I and type-II heterostructure types consisting of Hf2CO2 and MoS2 monolayers for new nanodevices in fields like photonics, electronics, optoelectronic and neuromorphic applications.
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Affiliation(s)
- Ekaterina V Sukhanova
- Emanuel Institute of Biochemical Physics RAS, 119334, 4 Kosigin st., Moscow, Russia.
| | - Zakhar I Popov
- Emanuel Institute of Biochemical Physics RAS, 119334, 4 Kosigin st., Moscow, Russia.
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7
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Bagheri M, Berger E, Komsa HP. Identification of Material Dimensionality Based on Force Constant Analysis. J Phys Chem Lett 2023; 14:7840-7847. [PMID: 37624876 PMCID: PMC10494234 DOI: 10.1021/acs.jpclett.3c01635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Accepted: 08/21/2023] [Indexed: 08/27/2023]
Abstract
Identification of low-dimensional structural units from the bulk atomic structure is a widely used approach for discovering new low-dimensional materials with new properties and applications. Such analysis is usually based solely on bond-length heuristics, whereas an analysis based on bond strengths would be physically more justified. Here, we study dimensionality classification based on the interatomic force constants of a structure with different approaches for selecting the bonded atoms. The implemented approaches are applied to the existing database of first-principles calculated force constants with a large variety of materials, and the results are analyzed by comparing them to those of several bond-length-based classification methods. Depending on the approach, they can either reproduce results from bond-length-based methods or provide complementary information. As an example of the latter, we managed to identify new non-van der Waals two-dimensional material candidates.
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Affiliation(s)
- Mohammad Bagheri
- Microelectronics Research Unit, Faculty
of Information Technology and Electrical Engineering, University of Oulu, Oulu FIN-90014, Finland
| | - Ethan Berger
- Microelectronics Research Unit, Faculty
of Information Technology and Electrical Engineering, University of Oulu, Oulu FIN-90014, Finland
| | - Hannu-Pekka Komsa
- Microelectronics Research Unit, Faculty
of Information Technology and Electrical Engineering, University of Oulu, Oulu FIN-90014, Finland
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8
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Niu Y, Zhang K, Cui X, Wu X, Yang J. Two-Dimensional Iron Silicide (FeSi x) Alloys with Above-Room-Temperature Ferromagnetism. NANO LETTERS 2023; 23:2332-2338. [PMID: 36897107 DOI: 10.1021/acs.nanolett.3c00113] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Two-dimensional (2D) materials with intrinsic room-temperature ferromagnetism have gathered tremendous interest as promising candidates for next-generation spintronics. Here, on the basis of first-principles calculations, we report a family of stable 2D iron silicide (FeSix) alloys via dimensional reduction of their bulk counterparts. Our results demonstrate that 2D Fe4Si2-hex, Fe4Si2-orth, Fe3Si2, and FeSi2 nanosheets are lattice-dynamically and thermally stable, confirmed by the calculated phonon spectra and Born-Oppenheimer dynamic simulation up to 1000 K. 2D FeSix nanosheets are ferromagnetic metals with estimated Curie temperatures ranging from 547 to 971 K due to strong direct exchange interaction between Fe sites. In addition, the electronic properties of 2D FeSix alloys can be maintained on silicon substrates, providing an ideal platform for spintronics applications in the nanoscale.
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Affiliation(s)
- Yijie Niu
- CAS Key Laboratory for Materials for Energy Conversion, School of Chemistry and Materials Science, CAS Center for Excellence in Nanoscience and Synergetic Innovation of Quantum Information & Quantum Technology, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Kai Zhang
- CAS Key Laboratory for Materials for Energy Conversion, School of Chemistry and Materials Science, CAS Center for Excellence in Nanoscience and Synergetic Innovation of Quantum Information & Quantum Technology, University of Science and Technology of China, Hefei, Anhui 230026, China
- Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Xuefeng Cui
- Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
- Hefei National Laboratory, University of Science and Technology of China, Hefei 230088, China
| | - Xiaojun Wu
- CAS Key Laboratory for Materials for Energy Conversion, School of Chemistry and Materials Science, CAS Center for Excellence in Nanoscience and Synergetic Innovation of Quantum Information & Quantum Technology, University of Science and Technology of China, Hefei, Anhui 230026, China
- Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
- Hefei National Laboratory, University of Science and Technology of China, Hefei 230088, China
| | - Jinlong Yang
- CAS Key Laboratory for Materials for Energy Conversion, School of Chemistry and Materials Science, CAS Center for Excellence in Nanoscience and Synergetic Innovation of Quantum Information & Quantum Technology, University of Science and Technology of China, Hefei, Anhui 230026, China
- Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
- Hefei National Laboratory, University of Science and Technology of China, Hefei 230088, China
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9
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Kistanov AA, Shcherbinin SA, Korznikova EA, Prezhdo OV. Prediction and Characterization of Two-Dimensional Zn 2VN 3. J Phys Chem Lett 2023; 14:1148-1155. [PMID: 36705575 DOI: 10.1021/acs.jpclett.2c03796] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
A two-dimensional (2D) monolayer of a novel ternary nitride Zn2VN3 is computationally designed, and its dynamical and thermal stability is demonstrated. A synthesis strategy is proposed based on experimental works on production of ternary nitride thin films, calculations of formation and exfoliation energies, and ab initio molecular dynamics simulations. A comprehensive characterization of 2D Zn2VN3, including investigation of its optoelectronic and mechanical properties, is conducted. It is shown that 2D Zn2VN3 is a semiconductor with an indirect band gap of 2.75 eV and a high work function of 5.27 eV. Its light absorption covers visible and ultraviolet regions. The band gap of 2D Zn2VN3 is found to be well tunable by applied strain. At the same time 2D Zn2VN3 possesses high stability against mechanical loads, point defects, and environmental impacts. Considering the unique properties found for 2D Zn2VN3, it can be used for application in optoelectronic and straintronic nanodevices.
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Affiliation(s)
- Andrey A Kistanov
- The Laboratory of Metals and Alloys Under Extreme Impacts, Ufa University of Science and Technology, 450076Ufa, Russia
| | - Stepan A Shcherbinin
- Peter the Great Saint Petersburg Polytechnical University, 195251Saint Petersburg, Russia
- Institute for Problems in Mechanical Engineering RAS, 199178Saint Petersburg, Russia
| | - Elena A Korznikova
- The Laboratory of Metals and Alloys Under Extreme Impacts, Ufa University of Science and Technology, 450076Ufa, Russia
| | - Oleg V Prezhdo
- Department of Chemistry, University of Southern California, Los Angeles, California90089, United States
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10
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Sukhanova EV, Sagatov NE, Oreshonkov AS, Gavryushkin PN, Popov ZI. Halogen-Doped Chevrel Phase Janus Monolayers for Photocatalytic Water Splitting. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:368. [PMID: 36678120 PMCID: PMC9860981 DOI: 10.3390/nano13020368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 01/10/2023] [Accepted: 01/11/2023] [Indexed: 06/17/2023]
Abstract
Chevrel non-van der Waals crystals are promising candidates for the fabrication of novel 2D materials due to their versatile crystal structure formed by covalently bonded (Mo6X8) clusters (X-chalcogen atom). Here, we present a comprehensive theoretical study of the stability and properties of Mo-based Janus 2D structures with Chevrel structures consisting of chalcogen and halogen atoms via density functional theory calculations. Based on the analysis performed, we determined that the S2Mo3I2 monolayer is the most promising structure for overall photocatalytic water-splitting application due to its appropriate band alignment and its ability to absorb visible light. The modulated Raman spectra for the representative structures can serve as a blueprint for future experimental verification of the proposed structures.
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Affiliation(s)
- Ekaterina V. Sukhanova
- Laboratory of Acoustic Microscopy, Emanuel Institute of Biochemical Physics of Russian Academy of Sciences, 119334 Moscow, Russia
| | - Nursultan E. Sagatov
- Laboratory of Phase Transformations and State Diagrams of the Earth’s Matter at High Pressures, Sobolev Institute of Geology and Mineralogy, Siberian Branch of Russian Academy of Sciences, 630090 Novosibirsk, Russia
| | - Aleksandr S. Oreshonkov
- Laboratory of Acoustic Microscopy, Emanuel Institute of Biochemical Physics of Russian Academy of Sciences, 119334 Moscow, Russia
- Laboratory of Molecular Spectroscopy, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 660036 Krasnoyarsk, Russia
- School of Engineering and Construction, Siberian Federal University, 660041 Krasnoyarsk, Russia
| | - Pavel N. Gavryushkin
- Laboratory of Acoustic Microscopy, Emanuel Institute of Biochemical Physics of Russian Academy of Sciences, 119334 Moscow, Russia
- Laboratory of Phase Transformations and State Diagrams of the Earth’s Matter at High Pressures, Sobolev Institute of Geology and Mineralogy, Siberian Branch of Russian Academy of Sciences, 630090 Novosibirsk, Russia
- Geology Geophysics Department, Novosibirsk State University, 630090 Novosibirsk, Russia
| | - Zakhar I. Popov
- Laboratory of Acoustic Microscopy, Emanuel Institute of Biochemical Physics of Russian Academy of Sciences, 119334 Moscow, Russia
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Kumar S, Wang Z, Zhang W, Liu X, Li M, Li G, Zhang B, Singh R. Optically Active Nanomaterials and Its Biosensing Applications-A Review. BIOSENSORS 2023; 13:bios13010085. [PMID: 36671920 PMCID: PMC9855722 DOI: 10.3390/bios13010085] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 12/26/2022] [Accepted: 01/01/2023] [Indexed: 05/17/2023]
Abstract
This article discusses optically active nanomaterials and their optical biosensing applications. In addition to enhancing their sensitivity, these nanomaterials also increase their biocompatibility. For this reason, nanomaterials, particularly those based on their chemical compositions, such as carbon-based nanomaterials, inorganic-based nanomaterials, organic-based nanomaterials, and composite-based nanomaterials for biosensing applications are investigated thoroughly. These nanomaterials are used extensively in the field of fiber optic biosensing to improve response time, detection limit, and nature of specificity. Consequently, this article describes contemporary and application-based research that will be of great use to researchers in the nanomaterial-based optical sensing field. The difficulties encountered during the synthesis, characterization, and application of nanomaterials are also enumerated, and their future prospects are outlined for the reader's benefit.
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Affiliation(s)
- Santosh Kumar
- Shandong Key Laboratory of Optical Communication Science and Technology, School of Physics Science and Information Technology, Liaocheng University, Liaocheng 252059, China
- Correspondence: (S.K.); (R.S.)
| | - Zhi Wang
- Shandong Key Laboratory of Optical Communication Science and Technology, School of Physics Science and Information Technology, Liaocheng University, Liaocheng 252059, China
| | - Wen Zhang
- Shandong Key Laboratory of Optical Communication Science and Technology, School of Physics Science and Information Technology, Liaocheng University, Liaocheng 252059, China
| | - Xuecheng Liu
- Shandong Key Laboratory of Optical Communication Science and Technology, School of Physics Science and Information Technology, Liaocheng University, Liaocheng 252059, China
| | - Muyang Li
- Shandong Key Laboratory of Optical Communication Science and Technology, School of Physics Science and Information Technology, Liaocheng University, Liaocheng 252059, China
| | - Guoru Li
- Shandong Key Laboratory of Optical Communication Science and Technology, School of Physics Science and Information Technology, Liaocheng University, Liaocheng 252059, China
| | - Bingyuan Zhang
- Shandong Key Laboratory of Optical Communication Science and Technology, School of Physics Science and Information Technology, Liaocheng University, Liaocheng 252059, China
| | - Ragini Singh
- College of Agronomy, Liaocheng University, Liaocheng 252059, China
- Correspondence: (S.K.); (R.S.)
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12
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Niu ZY, Jiao L, Zhang T, Zhao XM, Wang XF, Tan Z, Liu LZ, Chen S, Song XZ. Boosting Electrocatalytic Ammonia Synthesis of Bio-Inspired Porous Mo-Doped Hematite via Nitrogen Activation. ACS APPLIED MATERIALS & INTERFACES 2022; 14:55559-55567. [PMID: 36479880 DOI: 10.1021/acsami.2c16081] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Electrochemical N2 reduction reaction (NRR) emerges as a highly attractive alternative to the Haber-Bosch process for producing ammonia (NH3) under ambient circumstances. Currently, this technology still faces tremendous challenges due to the low ammonia production rate and low Faradaic efficiency, urgently prompting researchers to explore highly efficient electrocatalysts. Inspired by the Fe-Mo cofactor in nitrogenase, we report Mo-doped hematite (Fe2O3) porous nanospheres containing Fe-O-Mo subunits for enhanced activity and selectivity in the electrochemical reduction from N2 to NH3. Mo-doping induces the morphology change from a solid sphere to a porous sphere and enriches lattice defects, creating more active sites. It also regulates the electronic structures of Fe2O3 to accelerate charge transfer and enhance the intrinsic activity. As a consequence, Mo-doped Fe2O3 achieves effective N2 fixation with a high ammonia production rate of 21.3 ± 1.1 μg h-1 mgcat.-1 as well as a prominent Faradaic efficiency (FE) of 11.2 ± 0.6%, superior to the undoped Fe2O3 and other iron oxide catalysts. Density functional theory (DFT) calculations further unravel that the Mo-doping in Fe2O3 (110) narrows the band gap, promotes the N2 activation on the Mo site with an elongated N≡N bond length of 1.132 Å in the end-on configuration, and optimizes an associative distal pathway with a decreased energy barrier. Our results may pave the way toward enhancing the electrocatalytic NRR performance of iron-based materials by atomic-scale heteroatom doping.
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Affiliation(s)
- Zan-Yao Niu
- Leicester International Institute, Dalian University of Technology, Panjin 124221, China
| | - Lei Jiao
- Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), School of Physics, Dalian University of Technology, Dalian 116024, China
| | - Tao Zhang
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Xiu-Ming Zhao
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Xiao-Feng Wang
- Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), School of Physics, Dalian University of Technology, Dalian 116024, China
| | - Zhenquan Tan
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
- Leicester International Institute, Dalian University of Technology, Panjin 124221, China
| | - Li-Zhao Liu
- Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), School of Physics, Dalian University of Technology, Dalian 116024, China
| | - Siru Chen
- School of Materials and Chemical Engineering, Zhongyuan University of Technology, Zhengzhou 450007, China
| | - Xue-Zhi Song
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
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13
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Zhao Y, Liu Q, Zhang F, Jiang X, Gao W, Zhao J. Multiferroicity in a Two-Dimensional Non-van der Waals Crystal of AgCr 2X 4 (X = S or Se). J Phys Chem Lett 2022; 13:11346-11353. [PMID: 36454027 DOI: 10.1021/acs.jpclett.2c03160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Two-dimensional (2D) intrinsic multiferroics have long been pursued not only for their potential technological applications but also as model systems for studying emergent quantum phenomena and coupling mechanisms between various order parameters in low-dimensional space. However, the realization of 2D multiferroics is still a challenge. In this paper, we reveal that 2D AgCr2X4 (X = S or Se) crystals, which have been synthesized from the non-van der Waals (non-vdW) AgCrX2 bulk phase, are type I half-metallic/metallic multiferroics in which ferroelectricity and ferromagnetism coexist. The off-centering displacement of the Ag ion introduces out-of-plane polarization, and the magnetism originates from the interactions between Cr atoms. Remarkably, AgCr2Se4 shows topologically nontrivial spin textures, such as Meron pairs and Néel-type skyrmions, under suitable temperatures and magnetic fields. Our findings demonstrate that 2D multiferroics can be achieved from non-vdW materials and in turn open a new avenue for 2D multiferroics.
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Affiliation(s)
- Ying Zhao
- Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), Dalian University of Technology, Dalian116024, China
| | - Qinxi Liu
- Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), Dalian University of Technology, Dalian116024, China
| | - Fan Zhang
- Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), Dalian University of Technology, Dalian116024, China
| | - Xue Jiang
- Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), Dalian University of Technology, Dalian116024, China
| | - Weiwei Gao
- Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), Dalian University of Technology, Dalian116024, China
| | - Jijun Zhao
- Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), Dalian University of Technology, Dalian116024, China
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14
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Puebla S, Pucher T, Rouco V, Sanchez-Santolino G, Xie Y, Zamora V, Cuellar FA, Mompean FJ, Leon C, Island JO, Garcia-Hernandez M, Santamaria J, Munuera C, Castellanos-Gomez A. Combining Freestanding Ferroelectric Perovskite Oxides with Two-Dimensional Semiconductors for High Performance Transistors. NANO LETTERS 2022; 22:7457-7466. [PMID: 36108061 PMCID: PMC9523702 DOI: 10.1021/acs.nanolett.2c02395] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
We demonstrate the fabrication of field-effect transistors based on single-layer MoS2 and a thin layer of BaTiO3 (BTO) dielectric, isolated from its parent epitaxial template substrate. Thin BTO provides an ultrahigh-κ gate dielectric effectively screening Coulomb scattering centers. These devices show mobilities substantially larger than those obtained with standard SiO2 dielectrics and comparable with values obtained with hexagonal boron nitride, a dielectric employed for fabrication of high-performance two-dimensional (2D) based devices. Moreover, the ferroelectric character of BTO induces a robust hysteresis of the current vs gate voltage characteristics, attributed to its polarization switching. This hysteresis is strongly suppressed when the device is warmed up above the tetragonal-to-cubic transition temperature of BTO that leads to a ferroelectric-to-paraelectric transition. This hysteretic behavior is attractive for applications in memory storage devices. Our results open the door to the integration of a large family of complex oxides exhibiting strongly correlated physics in 2D-based devices.
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Affiliation(s)
- Sergio Puebla
- Materials
Science Factory, Instituto de Ciencia de
Materiales de Madrid (ICMM-CSIC), Madrid E-28049, Spain
| | - Thomas Pucher
- Materials
Science Factory, Instituto de Ciencia de
Materiales de Madrid (ICMM-CSIC), Madrid E-28049, Spain
| | - Victor Rouco
- GFMC,
Department Fisica de Materiales, Facultad de Fisica, Universidad Complutense 28040 Madrid, Spain
| | - Gabriel Sanchez-Santolino
- GFMC,
Department Fisica de Materiales, Facultad de Fisica, Universidad Complutense 28040 Madrid, Spain
- Laboratorio
de Heteroestructuras con aplicación en spintrónica, Unidad Asociada UCM/CSIC, 28040 Madrid, Spain
- Instituto
Pluridisciplinar, Universidad Complutense
de Madrid, 28040 Madrid, Spain
| | - Yong Xie
- Materials
Science Factory, Instituto de Ciencia de
Materiales de Madrid (ICMM-CSIC), Madrid E-28049, Spain
- School
of Advanced Materials and Nanotechnology, Xidian University, Xi’an 710071, China
| | - Victor Zamora
- GFMC,
Department Fisica de Materiales, Facultad de Fisica, Universidad Complutense 28040 Madrid, Spain
| | - Fabian A. Cuellar
- GFMC,
Department Fisica de Materiales, Facultad de Fisica, Universidad Complutense 28040 Madrid, Spain
| | - Federico J. Mompean
- Materials
Science Factory, Instituto de Ciencia de
Materiales de Madrid (ICMM-CSIC), Madrid E-28049, Spain
- Laboratorio
de Heteroestructuras con aplicación en spintrónica, Unidad Asociada UCM/CSIC, 28040 Madrid, Spain
| | - Carlos Leon
- GFMC,
Department Fisica de Materiales, Facultad de Fisica, Universidad Complutense 28040 Madrid, Spain
- Laboratorio
de Heteroestructuras con aplicación en spintrónica, Unidad Asociada UCM/CSIC, 28040 Madrid, Spain
| | - Joshua O. Island
- Department
of Physics and Astronomy, University of
Nevada Las Vegas, Las Vegas, Nevada 89154, United States
| | - Mar Garcia-Hernandez
- Materials
Science Factory, Instituto de Ciencia de
Materiales de Madrid (ICMM-CSIC), Madrid E-28049, Spain
- Laboratorio
de Heteroestructuras con aplicación en spintrónica, Unidad Asociada UCM/CSIC, 28040 Madrid, Spain
| | - Jacobo Santamaria
- GFMC,
Department Fisica de Materiales, Facultad de Fisica, Universidad Complutense 28040 Madrid, Spain
- Laboratorio
de Heteroestructuras con aplicación en spintrónica, Unidad Asociada UCM/CSIC, 28040 Madrid, Spain
| | - Carmen Munuera
- Materials
Science Factory, Instituto de Ciencia de
Materiales de Madrid (ICMM-CSIC), Madrid E-28049, Spain
- Laboratorio
de Heteroestructuras con aplicación en spintrónica, Unidad Asociada UCM/CSIC, 28040 Madrid, Spain
| | - Andres Castellanos-Gomez
- Materials
Science Factory, Instituto de Ciencia de
Materiales de Madrid (ICMM-CSIC), Madrid E-28049, Spain
- Laboratorio
de Heteroestructuras con aplicación en spintrónica, Unidad Asociada UCM/CSIC, 28040 Madrid, Spain
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15
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Kaur H, Coleman JN. Liquid-Phase Exfoliation of Nonlayered Non-Van-Der-Waals Crystals into Nanoplatelets. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2202164. [PMID: 35470487 DOI: 10.1002/adma.202202164] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 04/07/2022] [Indexed: 05/28/2023]
Abstract
For nearly 15 years, researchers have been using liquid-phase exfoliation (LPE) to produce 2D nanosheets from layered crystals. This has yielded multiple 2D materials in a solution-processable form whose utility has been demonstrated in multiple applications. It was believed that the exfoliation of such materials is enabled by the very large bonding anisotropy of layered materials where the strength of intralayer chemical bonds is very much larger than that of interlayer van der Waals bonds. However, over the last five years, a number of papers have raised questions about our understanding of exfoliation by describing the LPE of nonlayered materials. These results are extremely surprising because, as no van der Waals gap is present to provide an easily cleaved direction, the exfoliation of such compounds requires the breaking of only chemical bonds. Here the progress in this unexpected new research area is examined. The structure and properties of nanoplatelets produced by LPE of nonlayered materials are reviewed. A number of unexplained trends are found, not least the preponderance of isotropic materials that have been exfoliated to give high-aspect-ratio nanoplatelets. Finally, the applications potential of this new class of 2D materials are considered.
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Affiliation(s)
- Harneet Kaur
- School of Physics, CRANN & AMBER Research Centres, Trinity College Dublin, Dublin, D02 PN40, Ireland
| | - Jonathan N Coleman
- School of Physics, CRANN & AMBER Research Centres, Trinity College Dublin, Dublin, D02 PN40, Ireland
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16
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Ruan Q, Wang L, Bets KV, Yakobson BI. Step-Edge Epitaxy for Borophene Growth on Insulators. ACS NANO 2021; 15:18347-18353. [PMID: 34766759 DOI: 10.1021/acsnano.1c07589] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Borophene─a monatomic layer of boron atoms─stands out among two-dimensional (2D) materials, with its versatile properties tantalizing for physics exploration and next-generation devices. Yet its phases are all synthesized on and stay bound to metal substrates, hampering both characterization and use. Borophene growth on an inert insulator would allow postsynthesis exfoliation, but the weak adhesion to such a substrate results in a high 2D nucleation barrier, preventing clean borophene growth. This challenge can be circumvented in a strategy devised and demonstrated here with ab initio calculations. Naturally present 1D-defects, the step-edges on an h-BN substrate surface, enable boron epitaxial assembly, reduce the nucleation dimensionality, and lower the barrier by an order of magnitude (to 1.1 eV or less), yielding a v1/9 phase. Weak borophene adhesion to the insulator makes it readily accessible for comprehensive property tests or transfer into the device setting.
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Affiliation(s)
- Qiyuan Ruan
- Department of Materials Science and NanoEngineering, Rice University, Houston, Texas 77005, United States
| | - Luqing Wang
- Department of Materials Science and NanoEngineering, Rice University, Houston, Texas 77005, United States
| | - Ksenia V Bets
- Department of Materials Science and NanoEngineering, Rice University, Houston, Texas 77005, United States
| | - Boris I Yakobson
- Department of Materials Science and NanoEngineering, Rice University, Houston, Texas 77005, United States
- Department of Chemistry, Rice University, Houston, Texas 77005, United States
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