1
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Trung PD, Tong HD. First principles study of strain effects on prospective 2D photocatalysts Sn 2Se 2X 4 (X = P, As) with ultra-high charge carrier mobility. Phys Chem Chem Phys 2024; 26:4437-4446. [PMID: 38240055 DOI: 10.1039/d3cp05336a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2024]
Abstract
Ab initio calculations were employed to investigate the properties of Sn2Se2P4 and Sn2Se2As4, which are new semiconductors formed based on the 2D SnP3 structure. A comprehensive analysis was conducted to examine the structural characteristics and stability of both compounds. It was observed that both Sn2Se2P4 and Sn2Se2As4 exhibit notable toughness and ductility, characterized by a Poisson's ratio ranging from 0.16 to 0.20 and a Young's modulus ranging from 42.12 to 49.84 N m-1. The investigation focused on the examination of the electronic characteristics of the two compounds, as well as their correlation with optical properties, charge transport, and potential as photocatalysts. Being ductile semiconductors, the effects of strains on the properties of Sn2Se2P4 and Sn2Se2As4 were also investigated. The charge carrier mobility in the y-direction ranges from 103 to 104 cm2 V-1 s-1. Moreover, the electron-hole separation is expected to be very high as the difference in the mobilities of holes and electrons is really large. Moreover, it is worth noting that both Sn2Se2P4 and Sn2Se2As4 exhibit a significantly high absorption rate of 106 cm-1 in the visible region. The observed features of Sn2Se2P4 and Sn2Se2As4 indicate their potential as effective photocatalysts for the process of water splitting through the utilization of solar energy.
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Affiliation(s)
- Pham D Trung
- Yersin University, 27 Ton That Tung, Ward 8, Dalat City, Lam Dong Province, Vietnam.
| | - Hien D Tong
- Faculty of Engineering, Vietnamese-German University, Binh Duong, Vietnam.
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2
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Ozden B, Zhang T, Liu M, Fest A, Pearson DA, Khan E, Uprety S, Razon JE, Cherry J, Fujisawa K, Liu H, Perea-López N, Wang K, Isaacs-Smith T, Park M, Terrones M. Engineering Vacancies for the Creation of Antisite Defects in Chemical Vapor Deposition Grown Monolayer MoS 2 and WS 2 via Proton Irradiation. ACS NANO 2023; 17:25101-25117. [PMID: 38052014 DOI: 10.1021/acsnano.3c07752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/07/2023]
Abstract
It is critical to understand the laws of quantum mechanics in transformative technologies for computation and quantum information science applications to enable the ongoing second quantum revolution calls. Recently, spin qubits based on point defects have gained great attention, since these qubits can be initiated, selectively controlled, and read out with high precision at ambient temperature. The major challenge in these systems is controllably generating multiqubit systems while properly coupling the defects. To address this issue, we began by tackling the engineering challenges these systems present and understanding the fundamentals of defects. In this regard, we controllably generate defects in MoS2 and WS2 monolayers and tune their physicochemical properties via proton irradiation. We quantitatively discovered that the proton energy could modulate the defects' density and nature; higher defect densities were seen with lower proton irradiation energies. Three distinct defect types were observed: vacancies, antisites, and adatoms. In particular, the creation and manipulation of antisite defects provides an alternative way to create and pattern spin qubits based on point defects. Our results demonstrate that altering the particle irradiation energy can regulate the formation of defects, which can be utilized to modify the properties of 2D materials and create reliable electronic devices.
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Affiliation(s)
- Burcu Ozden
- Engineering and Science Division, Penn State Abington, Abington, Pennsylvania 19001, United States
| | - Tianyi Zhang
- Department of Materials Science, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Mingzu Liu
- Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Andres Fest
- Department of Materials Science, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Daniel A Pearson
- Engineering and Science Division, Penn State Abington, Abington, Pennsylvania 19001, United States
| | - Ethan Khan
- Department of Materials Science, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Sunil Uprety
- Department of Physics, Auburn University, Auburn, Alabama 36849, United States
| | - Jiffer E Razon
- Engineering and Science Division, Penn State Abington, Abington, Pennsylvania 19001, United States
| | - Javari Cherry
- Engineering and Science Division, Penn State Abington, Abington, Pennsylvania 19001, United States
| | - Kazunori Fujisawa
- Water Environment and Civil Engineering, Shinshu University, Matsumoto, Nagano 390-8621, Japan
| | - He Liu
- Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Nestor Perea-López
- Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Ke Wang
- Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16082, United States
| | - Tamara Isaacs-Smith
- Department of Physics, Auburn University, Auburn, Alabama 36849, United States
| | - Minseo Park
- Department of Physics, Auburn University, Auburn, Alabama 36849, United States
| | - Mauricio Terrones
- Department of Materials Science, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
- Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
- Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
- NSF-IUCRC Center for Atomically Thin 1093 Multifunctional Coatings (ATOMIC), The Pennsylvania State University, University Park, Pennsylvania 16082, United States
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3
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Hung NT, Zhang K, Van Thanh V, Guo Y, Puretzky AA, Geohegan DB, Kong J, Huang S, Saito R. Nonlinear Optical Responses of Janus MoSSe/MoS 2 Heterobilayers Optimized by Stacking Order and Strain. ACS NANO 2023; 17:19877-19886. [PMID: 37643404 DOI: 10.1021/acsnano.3c04436] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/31/2023]
Abstract
Nonlinear optical responses in second harmonic generation (SHG) of van der Waals heterobilayers, Janus MoSSe/MoS2, are theoretically optimized as a function of strain and stacking order by adopting an exchange-correlation hybrid functional and a real-time approach in first-principles calculation. We find that the calculated nonlinear susceptibility, χ(2), in AA stacking (550 pm/V) becomes three times as large as AB stacking (170 pm/V) due to the broken inversion symmetry in the AA stacking. The present theoretical prediction is compared with the observed SHG spectra of Janus MoSSe/MoS2 heterobilayers, in which the peak SHG intensity of AA stacking becomes four times as large as AB stacking. Furthermore, a relatively large, two-dimensional strain (4%) that breaks the C3v point group symmetry of the MoSSe/MoS2, enhances calculated χ(2) values for both AA (900 pm/V) and AB (300 pm/V) stackings 1.6 times as large as that without strain.
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Affiliation(s)
- Nguyen Tuan Hung
- Frontier Research Institute for Interdisciplinary Sciences, Tohoku University, Sendai 980-8578, Japan
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - Kunyan Zhang
- Department of Electrical and Computer Engineering, Rice University, Houston, Texas 77005, United States
| | - Vuong Van Thanh
- School of Mechanical Engineering, Hanoi University of Science and Technology, Hanoi 100000, Viet Nam
| | - Yunfan Guo
- Department of Chemistry, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Alexander A Puretzky
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - David B Geohegan
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Jing Kong
- Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Shengxi Huang
- Department of Electrical and Computer Engineering, Rice University, Houston, Texas 77005, United States
| | - Riichiro Saito
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
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4
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Basu N, Kumar R, Manikandan D, Ghosh Dastidar M, Hedge P, Nayak PK, Bhallamudi VP. Strain relaxation in monolayer MoS 2 over flexible substrate. RSC Adv 2023; 13:16241-16247. [PMID: 37266495 PMCID: PMC10230350 DOI: 10.1039/d3ra01381b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Accepted: 05/14/2023] [Indexed: 06/03/2023] Open
Abstract
In this communication, we demonstrate uniaxial strain relaxation in monolayer (1L) MoS2 transpires through cracks in both single and double-grain flakes. Chemical vapour deposition (CVD) grown 1L MoS2 has been transferred onto polyethylene terephthalate (PET) and poly(dimethylsiloxane) (PDMS) substrates for low (∼1%) and high (1-6%) strain measurements. Both Raman and photoluminescence (PL) spectroscopy revealed strain relaxation via cracks in the strain regime of 4-6%. In situ optical micrographs show the formation of large micron-scale cracks along the strain axis and ex situ atomic force microscopy (AFM) images reveal the formation of smaller lateral cracks due to the strain relaxation. Finite element simulation has been employed to estimate the applied strain efficiency as well as to simulate the strain distribution for MoS2 flakes. The present study reveals the uniaxial strain relaxation mechanism in 1L MoS2 and paves the way for exploring strain relaxation in other transition metal dichalcogenides (TMDCs) as well as their heterostructures.
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Affiliation(s)
- Nilanjan Basu
- Department of Physics, Indian Institute of Technology Madras Chennai 600 036 India
- 2D Materials Research and Innovation Group, Indian Institute of Technology Madras Chennai 600 036 India
| | - Ravindra Kumar
- Department of Physics, Indian Institute of Technology Madras Chennai 600 036 India
- 2D Materials Research and Innovation Group, Indian Institute of Technology Madras Chennai 600 036 India
| | - D Manikandan
- Department of Physics, Indian Institute of Technology Madras Chennai 600 036 India
- 2D Materials Research and Innovation Group, Indian Institute of Technology Madras Chennai 600 036 India
- Micro Nano and Bio-Fluidics Group, Indian Institute of Technology Madras Chennai 600 036 India
| | - Madhura Ghosh Dastidar
- Department of Physics, Indian Institute of Technology Madras Chennai 600 036 India
- 2D Materials Research and Innovation Group, Indian Institute of Technology Madras Chennai 600 036 India
- Quantum Center of Excellence for Diamond and Emerging Materials (QuCenDiEM) Group, Departments of Physics and Electrical Engineering, Indian Institute of Technology Madras Chennai 600036 India
| | - Praveen Hedge
- Department of Physics, Indian Institute of Technology Madras Chennai 600 036 India
- Quantum Center of Excellence for Diamond and Emerging Materials (QuCenDiEM) Group, Departments of Physics and Electrical Engineering, Indian Institute of Technology Madras Chennai 600036 India
| | - Pramoda K Nayak
- Department of Physics, Indian Institute of Technology Madras Chennai 600 036 India
- 2D Materials Research and Innovation Group, Indian Institute of Technology Madras Chennai 600 036 India
- Micro Nano and Bio-Fluidics Group, Indian Institute of Technology Madras Chennai 600 036 India
- Centre for Nano and Material Sciences, Jain (Deemed-to-be University) Jain Global Campus, Kanakapura Bangalore Karnataka 562112 India
| | - Vidya Praveen Bhallamudi
- Department of Physics, Indian Institute of Technology Madras Chennai 600 036 India
- Quantum Center of Excellence for Diamond and Emerging Materials (QuCenDiEM) Group, Departments of Physics and Electrical Engineering, Indian Institute of Technology Madras Chennai 600036 India
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5
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Alibakhshi MA, Kang X, Clymer D, Zhang Z, Vargas A, Meunier V, Wanunu M. Scaled-Up Synthesis of Freestanding Molybdenum Disulfide Membranes for Nanopore Sensing. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2207089. [PMID: 36580439 DOI: 10.1002/adma.202207089] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 12/08/2022] [Indexed: 06/17/2023]
Abstract
2D materials are ideal for nanopores with optimal detection sensitivity and resolution. Among these, molybdenum disulfide (MoS2 ) has gained traction as a less hydrophobic material than graphene. However, experiments using 2D nanopores remain challenging due to the lack of scalable methods for high-quality freestanding membranes. Herein, a site-directed, scaled-up synthesis of MoS2 membranes on predrilled nanoapertures on 4-inch wafer substrates with 75% yields is reported. Chemical vapor deposition (CVD), which introduces sulfur and molybdenum dioxide vapors across the sub-100 nm nanoapertures results in exclusive formation of freestanding membranes that seal the apertures. Nucleation and growth near the nanoaperture edges is followed by nanoaperture decoration with MoS2 , which proceeds until a critical flake curvature is achieved, after which fully spanning freestanding membranes form. Intentional blocking of reagent flow through the apertures inhibits MoS2 nucleation around the nanoapertures, promoting the formation of large-crystal monolayer MoS2 membranes. The in situ grown membranes along with facile membrane wetting and nanopore formation using dielectric breakdown enables the recording of dsDNA translocation events at an unprecedentedly high 1 MHz bandwidth. The methods presented here are important steps toward the development of scalable single-layer membrane manufacture for 2D nanofluidics and nanopore applications.
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Affiliation(s)
| | - Xinqi Kang
- Department of Bioengineering, Northeastern University, Boston, MA, 02115, USA
| | - David Clymer
- Department of Physics, Applied Physics, and Astronomy, Rensselaer Polytechnic Institute, Troy, NY, 12180, USA
| | - Zhuoyu Zhang
- School of Physics, Nankai University, Tianjin, 300071, P.R. China
| | - Anthony Vargas
- Department of Physics, Northeastern University, Boston, MA, 02115, USA
| | - Vincent Meunier
- Department of Physics, Applied Physics, and Astronomy, Rensselaer Polytechnic Institute, Troy, NY, 12180, USA
| | - Meni Wanunu
- Department of Physics, Northeastern University, Boston, MA, 02115, USA
- Department of Bioengineering, Northeastern University, Boston, MA, 02115, USA
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6
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Ramos M, López-Galán OA, Polanco J, José-Yacamán M. On the Electronic Structure of 2H-MoS 2: Correlating DFT Calculations and In-Situ Mechanical Bending on TEM. MATERIALS (BASEL, SWITZERLAND) 2022; 15:6732. [PMID: 36234076 PMCID: PMC9571706 DOI: 10.3390/ma15196732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/24/2022] [Revised: 09/05/2022] [Accepted: 09/15/2022] [Indexed: 06/16/2023]
Abstract
We present a systematic density functional theory study to determine the electronic structure of bending 2H-MoS2 layers up to 75° using information from in-situ nanoindentation TEM observations. The results from HOMO/LUMO and density of states plots indicate a metallic transition from the typical semiconducting phase, near Fermi energy level (EF) as a function of bending, which can mainly occur due to bending curvatures inducing a stretching and contracting of sulfur-sulfur chemical bonds located mostly over basal (001)-plane; furthermore, molybdenum ions play a major role in such transitions due to reallocation of their metallic d-character orbitals and the creation of "free electrons", possibly having an overlap between Mo-dx2-y2 and Modz2 orbitals. This research on the metallic transition of 2H-MoS2 allows us to understand the high catalytic activity for MoS2 nanostructures as extensively reported in the literature.
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Affiliation(s)
- Manuel Ramos
- Departamento de Física y Matemáticas, Instituto de Ingeniería y Tecnología, Universidad Autónoma de Ciudad Juárez, Edificio G-301A, 450 Avenida del Charro, Ciudad Juárez 32310, Chihuahua, Mexico
| | - Oscar A. López-Galán
- Departamento de Física y Matemáticas, Instituto de Ingeniería y Tecnología, Universidad Autónoma de Ciudad Juárez, Edificio G-301A, 450 Avenida del Charro, Ciudad Juárez 32310, Chihuahua, Mexico
| | - Javier Polanco
- Departamento de Física y Matemáticas, Instituto de Ingeniería y Tecnología, Universidad Autónoma de Ciudad Juárez, Edificio G-301A, 450 Avenida del Charro, Ciudad Juárez 32310, Chihuahua, Mexico
| | - Miguel José-Yacamán
- Applied Physics and Materials Science Department and Center for Material Interfaces Research and Applications (MIRA), Northern Arizona University, Flagstaff, AZ 86011, USA
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7
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Kastuar SM, Ekuma CE, Liu ZL. Efficient prediction of temperature-dependent elastic and mechanical properties of 2D materials. Sci Rep 2022; 12:3776. [PMID: 35260681 PMCID: PMC8904584 DOI: 10.1038/s41598-022-07819-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Accepted: 02/08/2022] [Indexed: 11/13/2022] Open
Abstract
An efficient automated toolkit for predicting the mechanical properties of materials can accelerate new materials design and discovery; this process often involves screening large configurational space in high-throughput calculations. Herein, we present the ElasTool toolkit for these applications. In particular, we use the ElasTool to study diversity of 2D materials and heterostructures including their temperature-dependent mechanical properties, and developed a machine learning algorithm for exploring predicted properties.
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Affiliation(s)
- S M Kastuar
- Department of Physics, Lehigh University, Bethlehem, PA, 18015, USA
| | - C E Ekuma
- Department of Physics, Lehigh University, Bethlehem, PA, 18015, USA.
| | - Z -L Liu
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, China.,College of Physics and Electric Information, Luoyang Normal University, Luoyang, 471934, China
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8
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Zhang C, Larionov KV, Firestein KL, Fernando JFS, Lewis CE, Sorokin PB, Golberg DV. Optomechanical Properties of MoSe 2 Nanosheets as Revealed by In Situ Transmission Electron Microscopy. NANO LETTERS 2022; 22:673-679. [PMID: 35007088 DOI: 10.1021/acs.nanolett.1c03796] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Free-standing few-layered MoSe2 nanosheet stacks optoelectronic signatures are analyzed by using light compatible in situ transmission electron microscopy (TEM) utilizing an optical TEM holder allowing for the simultaneous mechanical deformation, electrical probing and light illumination of a sample. Two types of deformation, namely, (i) bending of nanosheets perpendicular to their basal atomic planes and (ii) edge deformation parallel to the basal atomic planes, lead to two distinctly different optomechanical performances of the nanosheet stacks. The former deformation induces a stable but rather marginal increase in photocurrent, whereas the latter mode is prone to unstable nonsystematic photocurrent value changes and a red-shifted photocurrent spectrum. The experimental results are verified by ab initio calculations using density functional theory (DFT).
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Affiliation(s)
- Chao Zhang
- Centre for Material Science and School of Chemistry and Physics, Queensland University of Technology (QUT), 2 George Street, Brisbane, Queensland 4000, Australia
| | - Konstantin V Larionov
- National University of Science and Technology MISIS, 4 Leninsky Prospect, Moscow 119049, Russian Federation
- Moscow Institute of Physics and Technology, 9 Institutskiy Pereulok, Dolgoprudny, Moscow Region 141701, Russian Federation
| | - Konstantin L Firestein
- Centre for Material Science and School of Chemistry and Physics, Queensland University of Technology (QUT), 2 George Street, Brisbane, Queensland 4000, Australia
| | - Joseph F S Fernando
- Centre for Material Science and School of Chemistry and Physics, Queensland University of Technology (QUT), 2 George Street, Brisbane, Queensland 4000, Australia
| | - Courtney-Elyce Lewis
- Centre for Material Science and School of Chemistry and Physics, Queensland University of Technology (QUT), 2 George Street, Brisbane, Queensland 4000, Australia
| | - Pavel B Sorokin
- National University of Science and Technology MISIS, 4 Leninsky Prospect, Moscow 119049, Russian Federation
- Moscow Institute of Physics and Technology, 9 Institutskiy Pereulok, Dolgoprudny, Moscow Region 141701, Russian Federation
| | - Dmitri V Golberg
- Centre for Material Science and School of Chemistry and Physics, Queensland University of Technology (QUT), 2 George Street, Brisbane, Queensland 4000, Australia
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Wang J, Sui L, Huang J, Miao L, Nie Y, Wang K, Yang Z, Huang Q, Gong X, Nan Y, Ai K. MoS 2-based nanocomposites for cancer diagnosis and therapy. Bioact Mater 2021; 6:4209-4242. [PMID: 33997503 PMCID: PMC8102209 DOI: 10.1016/j.bioactmat.2021.04.021] [Citation(s) in RCA: 72] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2020] [Revised: 04/05/2021] [Accepted: 04/11/2021] [Indexed: 12/24/2022] Open
Abstract
Molybdenum is a trace dietary element necessary for the survival of humans. Some molybdenum-bearing enzymes are involved in key metabolic activities in the human body (such as xanthine oxidase, aldehyde oxidase and sulfite oxidase). Many molybdenum-based compounds have been widely used in biomedical research. Especially, MoS2-nanomaterials have attracted more attention in cancer diagnosis and treatment recently because of their unique physical and chemical properties. MoS2 can adsorb various biomolecules and drug molecules via covalent or non-covalent interactions because it is easy to modify and possess a high specific surface area, improving its tumor targeting and colloidal stability, as well as accuracy and sensitivity for detecting specific biomarkers. At the same time, in the near-infrared (NIR) window, MoS2 has excellent optical absorption and prominent photothermal conversion efficiency, which can achieve NIR-based phototherapy and NIR-responsive controlled drug-release. Significantly, the modified MoS2-nanocomposite can specifically respond to the tumor microenvironment, leading to drug accumulation in the tumor site increased, reducing its side effects on non-cancerous tissues, and improved therapeutic effect. In this review, we introduced the latest developments of MoS2-nanocomposites in cancer diagnosis and therapy, mainly focusing on biosensors, bioimaging, chemotherapy, phototherapy, microwave hyperthermia, and combination therapy. Furthermore, we also discuss the current challenges and prospects of MoS2-nanocomposites in cancer treatment.
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Affiliation(s)
- Jianling Wang
- Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, 410078, China
- Hunan Provincial Key Laboratory of Cardiovascular Research, Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, 410078, China
| | - Lihua Sui
- Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, 410078, China
- Hunan Provincial Key Laboratory of Cardiovascular Research, Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, 410078, China
| | - Jia Huang
- Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, 410078, China
- Hunan Provincial Key Laboratory of Cardiovascular Research, Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, 410078, China
| | - Lu Miao
- Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, 410078, China
- Hunan Provincial Key Laboratory of Cardiovascular Research, Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, 410078, China
| | - Yubing Nie
- Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, 410078, China
- Hunan Provincial Key Laboratory of Cardiovascular Research, Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, 410078, China
| | - Kuansong Wang
- Department of Pathology, Xiangya Hospital, Central South University, Changsha, Hunan, 410078, China
- Department of Pathology, School of Basic Medical Science, Central South University, Changsha, Hunan, 410013, China
| | - Zhichun Yang
- Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, 410078, China
- Hunan Provincial Key Laboratory of Cardiovascular Research, Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, 410078, China
| | - Qiong Huang
- Department of Pharmacology, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China
| | - Xue Gong
- Department of Radiology, The Second Hospital of Jilin University, Changchun, 130041, China
| | - Yayun Nan
- Geriatric Medical Center, Ningxia People's Hospital, Yinchuan, China
| | - Kelong Ai
- Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, 410078, China
- Hunan Provincial Key Laboratory of Cardiovascular Research, Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, 410078, China
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10
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Di Giorgio C, Blundo E, Pettinari G, Felici M, Polimeni A, Bobba F. Exceptional Elasticity of Microscale Constrained MoS 2 Domes. ACS APPLIED MATERIALS & INTERFACES 2021; 13:48228-48238. [PMID: 34592817 PMCID: PMC8517950 DOI: 10.1021/acsami.1c13293] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Accepted: 09/21/2021] [Indexed: 05/31/2023]
Abstract
The outstanding mechanical performances of two-dimensional (2D) materials make them appealing for the emerging fields of flextronics and straintronics. However, their manufacturing and integration in 2D crystal-based devices rely on a thorough knowledge of their hardness, elasticity, and interface mechanics. Here, we investigate the elasticity of highly strained monolayer-thick MoS2 membranes, in the shape of micrometer-sized domes, by atomic force microscopy (AFM)-based nanoindentation experiments. A dome's crushing procedure is performed to induce a local re-adhesion of the dome's membrane to the bulk substrate under the AFM tip's load. It is worth noting that no breakage, damage, or variation in size and shape are recorded in 95% of the crushed domes upon unloading. Furthermore, such a procedure paves the way to address quantitatively the extent of the van der Waals interlayer interaction and adhesion of MoS2 by studying pull-in instabilities and hysteresis of the loading-unloading cycles. The fundamental role and advantage of using a superimposed dome's constraint are also discussed.
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Affiliation(s)
- Cinzia Di Giorgio
- Department
of Physics E.R. Caianiello, University of
Salerno, 84084 Fisciano, Italy
- INFN,
Sezione di Napoli, Gruppo Collegato di Salerno, Complesso Universitario di Monte S. Angelo, 80126 Napoli, Italy
| | - Elena Blundo
- Physics
Department, Sapienza University of Rome, 00185 Rome, Italy
| | - Giorgio Pettinari
- Institute
for Photonics and Nanotechnologies (CNR-IFN), National Research Council, 00156 Rome, Italy
| | - Marco Felici
- Physics
Department, Sapienza University of Rome, 00185 Rome, Italy
| | - Antonio Polimeni
- Physics
Department, Sapienza University of Rome, 00185 Rome, Italy
| | - Fabrizio Bobba
- Department
of Physics E.R. Caianiello, University of
Salerno, 84084 Fisciano, Italy
- INFN,
Sezione di Napoli, Gruppo Collegato di Salerno, Complesso Universitario di Monte S. Angelo, 80126 Napoli, Italy
- CNR-SPIN, 84084 Fisciano, SA, Italy
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11
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Rauf A, Cojal González JD, Balkan A, Severin N, Sokolov IM, Rabe JP. Shaping surfaces and interfaces of 2D materials on mica with intercalating water and ethanol. Mol Phys 2021. [DOI: 10.1080/00268976.2021.1947534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Abdul Rauf
- Department of Physics & IRIS Adlershof, Humboldt-Universität zu Berlin, Berlin, Germany
| | | | - Alper Balkan
- Department of Physics & IRIS Adlershof, Humboldt-Universität zu Berlin, Berlin, Germany
| | - Nikolai Severin
- Department of Physics & IRIS Adlershof, Humboldt-Universität zu Berlin, Berlin, Germany
| | - Igor M. Sokolov
- Department of Physics & IRIS Adlershof, Humboldt-Universität zu Berlin, Berlin, Germany
| | - Jürgen P. Rabe
- Department of Physics & IRIS Adlershof, Humboldt-Universität zu Berlin, Berlin, Germany
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12
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Zhou W, Dong L, Tan L, Tang Q. Understanding the air stability of defective MoS 2and the oxidation effect on the surface HER activity. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2021; 33:395002. [PMID: 34256369 DOI: 10.1088/1361-648x/ac13fb] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Accepted: 07/13/2021] [Indexed: 06/13/2023]
Abstract
The defective single layer MoS2(SL-MoS2) with high defect concentrations has shown promising electrocatalytic potential, but it is also highly reactive with gas molecules. The study of electro-chemical activity on gas doped defective SL-MoS2is of importance yet still scarcely discussed. Herein, we performed density functional theory calculations to study the adsorption and chemical activity of four major air molecules on the defective SL-MoS2under different defect concentrations, and evaluated the influence on the hydrogen evolution reaction activity. The N2and CO2molecules are in physisorption states, H2O molecule is in molecular chemisorption state, while O2can be strongly captured and dissociated into atomic O*, which repair the S-vacancy and form O-doped structure. Further study showed that compared to the inert S surface of pure MoS2, the O incorporation greatly enhance the surface reactivity. Using H adsorption as the test probe, the adsorption of H becomes stronger with the increasing oxygen concentration. We further unravel the electronic origins underlying the catalytic activity. The lowest unoccupied electronic states are shown to correlate linearly with the activity, and thus can be used as an electronic descriptor to characterize the electrocatalytic activity.
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Affiliation(s)
- Wenyu Zhou
- School of Chemistry and Chemical Engineering, Chongqing Key Laboratory of Theoretical and Computational Chemistry, Chongqing University, Chongqing 401331, People's Republic of China
| | - Lichun Dong
- School of Chemistry and Chemical Engineering, Chongqing Key Laboratory of Theoretical and Computational Chemistry, Chongqing University, Chongqing 401331, People's Republic of China
| | - Luxi Tan
- School of Chemistry and Chemical Engineering, Chongqing Key Laboratory of Theoretical and Computational Chemistry, Chongqing University, Chongqing 401331, People's Republic of China
| | - Qing Tang
- School of Chemistry and Chemical Engineering, Chongqing Key Laboratory of Theoretical and Computational Chemistry, Chongqing University, Chongqing 401331, People's Republic of China
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13
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Xie L, Oshima Y. Quantitative estimation of atom-scaled ripple structure using transmission electron microscopy images. NANOTECHNOLOGY 2021; 32:185703. [PMID: 33498028 DOI: 10.1088/1361-6528/abe006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Atom-scaled ripple structure can be intrinsically formed because of thermal instability or induced stress in graphene or two-dimensional (2D) materials. However, it is difficult to estimate the period, amplitude, and shape of such a ripple structure. In this study, by applying the geometrical phase analysis method to atomically resolved transmission electron microscopy images, we demonstrate that the atom-scaled ripple structure of MoS2 nanosheet can be quantitatively analyzed at the subnanometer scale. Furthermore, by analyzing the observed ripple structure of the MoS2 nanosheet, we established that it is inclined by approximately 7.1° from the plane perpendicular to the incident electron beam; it had 5.5 and 0.3 nm in period and amplitude, respectively. For quantitative estimation of ripple structure, our results provide an effective method that contributes to a better understanding of 2D materials in the sub-nanometre scale.
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Affiliation(s)
- Lilin Xie
- School of Materials Science, Japan Advanced Institute of Science and Technology, Ishikawa, Japan
| | - Yoshifumi Oshima
- School of Materials Science, Japan Advanced Institute of Science and Technology, Ishikawa, Japan
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14
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Holst B, Alexandrowicz G, Avidor N, Benedek G, Bracco G, Ernst WE, Farías D, Jardine AP, Lefmann K, Manson JR, Marquardt R, Artés SM, Sibener SJ, Wells JW, Tamtögl A, Allison W. Material properties particularly suited to be measured with helium scattering: selected examples from 2D materials, van der Waals heterostructures, glassy materials, catalytic substrates, topological insulators and superconducting radio frequency materials. Phys Chem Chem Phys 2021; 23:7653-7672. [PMID: 33625410 DOI: 10.1039/d0cp05833e] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Helium Atom Scattering (HAS) and Helium Spin-Echo scattering (HeSE), together helium scattering, are well established, but non-commercial surface science techniques. They are characterised by the beam inertness and very low beam energy (<0.1 eV) which allows essentially all materials and adsorbates, including fragile and/or insulating materials and light adsorbates such as hydrogen to be investigated on the atomic scale. At present there only exist an estimated less than 15 helium and helium spin-echo scattering instruments in total, spread across the world. This means that up till now the techniques have not been readily available for a broad scientific community. Efforts are ongoing to change this by establishing a central helium scattering facility, possibly in connection with a neutron or synchrotron facility. In this context it is important to clarify what information can be obtained from helium scattering that cannot be obtained with other surface science techniques. Here we present a non-exclusive overview of a range of material properties particularly suited to be measured with helium scattering: (i) high precision, direct measurements of bending rigidity and substrate coupling strength of a range of 2D materials and van der Waals heterostructures as a function of temperature, (ii) direct measurements of the electron-phonon coupling constant λ exclusively in the low energy range (<0.1 eV, tuneable) for 2D materials and van der Waals heterostructures (iii) direct measurements of the surface boson peak in glassy materials, (iv) aspects of polymer chain surface dynamics under nano-confinement (v) certain aspects of nanoscale surface topography, (vi) central properties of surface dynamics and surface diffusion of adsorbates (HeSE) and (vii) two specific science case examples - topological insulators and superconducting radio frequency materials, illustrating how combined HAS and HeSE are necessary to understand the properties of quantum materials. The paper finishes with (viii) examples of molecular surface scattering experiments and other atom surface scattering experiments which can be performed using HAS and HeSE instruments.
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Affiliation(s)
- Bodil Holst
- Department of Physics and Technology, University of Bergen, Allegaten 55, 5007 Bergen, Norway.
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15
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Li Y, Chen P, Liu H, Peng J, Gao F, Luo N. Wrinkling and failure behavior of single-layer MoS 2 sheets under in-plane shear. Phys Chem Chem Phys 2019; 21:19115-19125. [PMID: 31432807 DOI: 10.1039/c9cp03487k] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this paper, the wrinkling and failure behavior of single layer MoS2 (SLMoS2) sheets under in-plane shear is investigated using molecular simulations and the nonlocal model. Wrinkling and failure features, such as the stress-strain relation, the amplitude and the half-wavelength, are comprehensively explored. The effects of size, temperature and pre-existing cracks on the wrinkling and failure behavior are then taken into consideration. It is found that the whole process can be divided into three stages, i.e., the pre-buckling stage, the buckling stage and the failure stage. The classical continuum model is found to be limited in quantitatively analyzing the wrinkling behavior due to the lack of size effect. The nonlocal parameter, a key parameter to characterize the size effect, is first reported. What is more, compared with edge cracks, SLMoS2 sheets are more sensitive to pre-existing centre cracks. This work can provide a better understanding of the wrinkling and failure properties of SLMoS2 sheets under shear loads, and should be helpful for developing various flexible electronic devices.
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Affiliation(s)
- Yao Li
- State Key Laboratory for Geomechanics and Deep Underground Engineering, School of Mechanics and Civil Engineering, School of Mechatronic, School of Physics, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China.
| | - Peijian Chen
- State Key Laboratory for Geomechanics and Deep Underground Engineering, School of Mechanics and Civil Engineering, School of Mechatronic, School of Physics, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China. and John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, USA
| | - Hao Liu
- State Key Laboratory for Geomechanics and Deep Underground Engineering, School of Mechanics and Civil Engineering, School of Mechatronic, School of Physics, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China.
| | - Juan Peng
- State Key Laboratory for Geomechanics and Deep Underground Engineering, School of Mechanics and Civil Engineering, School of Mechatronic, School of Physics, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China.
| | - Feng Gao
- State Key Laboratory for Geomechanics and Deep Underground Engineering, School of Mechanics and Civil Engineering, School of Mechatronic, School of Physics, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China.
| | - Ning Luo
- State Key Laboratory for Geomechanics and Deep Underground Engineering, School of Mechanics and Civil Engineering, School of Mechatronic, School of Physics, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China.
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16
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Urbanová V, Pumera M. Biomedical and bioimaging applications of 2D pnictogens and transition metal dichalcogenides. NANOSCALE 2019; 11:15770-15782. [PMID: 31424462 DOI: 10.1039/c9nr04658e] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Multifunctional platforms will play a key role and gain more prominence in the field of personalized healthcare worldwide in the near future due to the ever-increasing number of patients suffering from cancer. Along with the development of efficient techniques for cancer treatment, a considerable effort should be devoted toward the exploration of an emerging class of materials with unique properties that might be beneficial in this context. Currently, 2D post-carbon materials, such as pnictogens (phosphorene, antimonene), transition metal dichalcogenides, and boron nitride, have become popular due to their efficient photothermal behavior, drug-loading capability, and low toxicity. This review underlines the recent progresses made in the abovementioned 2D materials for photothermal/photodynamic cancer therapies and their applicability in bioimaging applications.
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Affiliation(s)
- Veronika Urbanová
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague 6, Czech Republic.
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17
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Samadi M, Sarikhani N, Zirak M, Zhang H, Zhang HL, Moshfegh AZ. Group 6 transition metal dichalcogenide nanomaterials: synthesis, applications and future perspectives. NANOSCALE HORIZONS 2018; 3:90-204. [PMID: 32254071 DOI: 10.1039/c7nh00137a] [Citation(s) in RCA: 116] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Group 6 transition metal dichalcogenides (G6-TMDs), most notably MoS2, MoSe2, MoTe2, WS2 and WSe2, constitute an important class of materials with a layered crystal structure. Various types of G6-TMD nanomaterials, such as nanosheets, nanotubes and quantum dot nano-objects and flower-like nanostructures, have been synthesized. High thermodynamic stability under ambient conditions, even in atomically thin form, made nanosheets of these inorganic semiconductors a valuable asset in the existing library of two-dimensional (2D) materials, along with the well-known semimetallic graphene and insulating hexagonal boron nitride. G6-TMDs generally possess an appropriate bandgap (1-2 eV) which is tunable by size and dimensionality and changes from indirect to direct in monolayer nanosheets, intriguing for (opto)electronic, sensing, and solar energy harvesting applications. Moreover, rich intercalation chemistry and abundance of catalytically active edge sites make them promising for fabrication of novel energy storage devices and advanced catalysts. In this review, we provide an overview on all aspects of the basic science, physicochemical properties and characterization techniques as well as all existing production methods and applications of G6-TMD nanomaterials in a comprehensive yet concise treatment. Particular emphasis is placed on establishing a linkage between the features of production methods and the specific needs of rapidly growing applications of G6-TMDs to develop a production-application selection guide. Based on this selection guide, a framework is suggested for future research on how to bridge existing knowledge gaps and improve current production methods towards technological application of G6-TMD nanomaterials.
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Affiliation(s)
- Morasae Samadi
- Department of Physics, Sharif University of Technology, Tehran 11155-9161, Iran.
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18
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Wu J, Cao P, Zhang Z, Ning F, Zheng SS, He J, Zhang Z. Grain-Size-Controlled Mechanical Properties of Polycrystalline Monolayer MoS 2. NANO LETTERS 2018; 18:1543-1552. [PMID: 29390189 DOI: 10.1021/acs.nanolett.7b05433] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Pristine monocrystalline molybdenum disulfide (MoS2) possesses high mechanical strength comparable to that of stainless steel. Large-area chemical-vapor-deposited monolayer MoS2 tends to be polycrystalline with intrinsic grain boundaries (GBs). Topological defects and grain size skillfully alter its physical properties in a variety of materials; however, the polycrystallinity and its role played in the mechanical performance of the emerging single-layer MoS2 remain largely unknown. Here, using large-scale atomistic simulations, GB structures and mechanical characteristics of realistic single-layered polycrystalline MoS2 of varying grain size prepared by confinement-quenched method are investigated. Depending on misorientation angle, structural energetics of polar-GBs in polycrystals favor diverse dislocation cores, consistent with experimental observations. Polycrystals exhibit grain-size-dependent thermally induced global out-of-plane deformation, although defective GBs in MoS2 show planar structures that are in contrast to the graphene. Tensile tests show that presence of cohesive GBs pronouncedly deteriorates the in-plane mechanical properties of MoS2. Both stiffness and strength follow an inverse pseudo Hall-Petch relation to grain size, which is shown to be governed by the weakest link mechanism. Under uniaxial tension, transgranular crack propagates with small deflection, whereas upon biaxial stretching, the crack grows in a kinked manner with large deflection. These findings shed new light in GB-based engineering and control of mechanical properties of MoS2 crystals toward real-world applications in flexible electronics and nanoelectromechanical systems.
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Affiliation(s)
- Jianyang Wu
- NTNU Nanomechanical Lab, Department of Structural Engineering, Norwegian University of Science and Technology (NTNU) , Trondheim 7491, Norway
| | - Pinqiang Cao
- Faculty of Engineering, China University of Geosciences , Wuhan, Hubei 430074, PR China
| | | | - Fulong Ning
- Faculty of Engineering, China University of Geosciences , Wuhan, Hubei 430074, PR China
| | | | - Jianying He
- NTNU Nanomechanical Lab, Department of Structural Engineering, Norwegian University of Science and Technology (NTNU) , Trondheim 7491, Norway
| | - Zhiliang Zhang
- NTNU Nanomechanical Lab, Department of Structural Engineering, Norwegian University of Science and Technology (NTNU) , Trondheim 7491, Norway
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19
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González RI, Valencia FJ, Rogan J, Valdivia JA, Sofo J, Kiwi M, Munoz F. Bending energy of 2D materials: graphene, MoS2 and imogolite. RSC Adv 2018; 8:4577-4583. [PMID: 35539543 PMCID: PMC9077804 DOI: 10.1039/c7ra10983k] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2017] [Accepted: 01/15/2018] [Indexed: 11/21/2022] Open
Abstract
The bending process of 2D materials, subject to an external force, is investigated, and applied to graphene, molybdenum disulphide (MoS2), and imogolite.
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Affiliation(s)
- Rafael I. González
- Centro de Nanotecnología Aplicada
- Facultad de Ciencias
- Universidad Mayor
- Santiago
- Chile
| | - Felipe J. Valencia
- Centro para el Desarrollo de la Nanociencia y la Nanotecnología (CEDENNA)
- Santiago
- Chile
- Departamento de Física
- Facultad de Ciencias
| | - José Rogan
- Centro para el Desarrollo de la Nanociencia y la Nanotecnología (CEDENNA)
- Santiago
- Chile
- Departamento de Física
- Facultad de Ciencias
| | - Juan Alejandro Valdivia
- Centro para el Desarrollo de la Nanociencia y la Nanotecnología (CEDENNA)
- Santiago
- Chile
- Departamento de Física
- Facultad de Ciencias
| | - Jorge Sofo
- Department of Physics and Material Research Institute
- The Pennsylvania State University
- University Park
- USA
| | - Miguel Kiwi
- Centro para el Desarrollo de la Nanociencia y la Nanotecnología (CEDENNA)
- Santiago
- Chile
- Departamento de Física
- Facultad de Ciencias
| | - Francisco Munoz
- Centro para el Desarrollo de la Nanociencia y la Nanotecnología (CEDENNA)
- Santiago
- Chile
- Departamento de Física
- Facultad de Ciencias
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20
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Ramos M, Galindo-Hernández F, Arslan I, Sanders T, Domínguez JM. Electron tomography and fractal aspects of MoS 2 and MoS 2/Co spheres. Sci Rep 2017; 7:12322. [PMID: 28951557 PMCID: PMC5615070 DOI: 10.1038/s41598-017-12029-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2017] [Accepted: 08/29/2017] [Indexed: 11/09/2022] Open
Abstract
A study was made by a combination of 3D electron tomography reconstruction methods and N2 adsorption for determining the fractal dimension for nanometric MoS2 and MoS2/Co catalyst particles. DFT methods including Neimarke-Kiselev's method allowed to determine the particle porosity and fractal arrays at the atomic scale for the S-Mo-S(Co) 2D- layers that conform the spherically shaped catalyst particles. A structural and textural correlation was sought by further characterization performed by x-ray Rietveld refinement and Radial Distribution Function (RDF) methods, electron density maps, computational density functional theory methods and nitrogen adsorption methods altogether, for studying the structural and textural features of spherical MoS2 and MoS2/Co particles. Neimark-Kiselev's equations afforded the evaluation of a pore volume variation from 10 to 110 cm3/g by cobalt insertion in the MoS2 crystallographic lattice, which induces the formation of cavities and throats in between of less than 29 nm, with a curvature radius r k < 14.4 nm; typical large needle-like arrays having 20 2D layers units correspond to a model consisting of smooth surfaces within these cavities. Decreasing D P , D B , D I and D M values occur when Co atoms are present in the MoS2 laminates, which promote the formation of smoother edges and denser surfaces that have an influence on the catalytic properties of the S-Mo-S(Co) system.
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Affiliation(s)
- Manuel Ramos
- Departamento de Física y Matemáticas, UACJ-Instituto de Ingeniería y Tecnología, #450 Avenida del Charro, Cuidad Juárez, 32310, México, USA
| | - Félix Galindo-Hernández
- Instituto Mexicano del Petróleo (IMP), Eje Central Lázaro Cárdenas Norte 152 Col. San Bartolo Atepehuacan, México, D.F., C.P 07730, USA
| | - Ilke Arslan
- Fundamental and Computational Sciences Directorate, Institute for Integrated Catalysis and Environmental Molecular Science Laboratory, Pacific Northwest National Laboratory, Post Office Box 999, Richland, Washington, 99352, United States
| | - Toby Sanders
- Fundamental and Computational Sciences Directorate, Institute for Integrated Catalysis and Environmental Molecular Science Laboratory, Pacific Northwest National Laboratory, Post Office Box 999, Richland, Washington, 99352, United States
| | - José Manuel Domínguez
- Instituto Mexicano del Petróleo (IMP), Eje Central Lázaro Cárdenas Norte 152 Col. San Bartolo Atepehuacan, México, D.F., C.P 07730, USA.
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21
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Gao L. Flexible Device Applications of 2D Semiconductors. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2017; 13:1603994. [PMID: 28464480 DOI: 10.1002/smll.201603994] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Revised: 01/05/2017] [Indexed: 06/07/2023]
Abstract
Graphene-like single- or few-layer semiconductors, such as dichalcogenides and buckled nanocrystals, possess direct and tunable bandgaps, and excellent electrical, optical, mechanical and thermal properties. This unique set of desirable properties of 2D semiconductors has triggered great interest in developing ultra-thin 2D flexible electronic devices, which ranges from realizing better material quality and simplified fabrication processes, to improving device performance and expanding the application horizon. The most explored 2D flexible devices based on transition metal dichalcogenides and black phosphorous include field-effect transistors, optoelectronics, electronic sensors and supercapacitors. By taking advantage of a large portfolio of materials and properties of 2D crystals, a new generation of low-cost, high-performance, transparent, flexible and wearable devices looks attractive and promising in advancing flexible electronic technologies.
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Affiliation(s)
- Li Gao
- School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China
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22
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Remsing RC, Waghmare UV, Klein ML. Thermal Ripples in Model Molybdenum Disulfide Monolayers. Z Anorg Allg Chem 2016. [DOI: 10.1002/zaac.201600373] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Richard C. Remsing
- Institute for Computational Molecular Science, Center for the Computational Design of Functional Layered Materials, and Department of Chemistry Temple University 1925 N. 12th St. 19122 Philadelphia PA USA
| | - Umesh V. Waghmare
- Theoretical Sciences Unit Jawaharlal Nehru Centre for Advanced Scientific Research 560 064 Jakkur Bangalore India
| | - Michael L. Klein
- Institute for Computational Molecular Science, Center for the Computational Design of Functional Layered Materials, and Department of Chemistry Temple University 1925 N. 12th St. 19122 Philadelphia PA USA
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23
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Shao T, Wen J, Zhang Q, Zhou Y, Liu L, Yuwen L, Tian Y, Zhang Y, Tian W, Su Y, Teng Z, Lu G, Xu J. NIR photoresponsive drug delivery and synergistic chemo-photothermal therapy by monodispersed-MoS2-nanosheets wrapped periodic mesoporous organosilicas. J Mater Chem B 2016; 4:7708-7717. [DOI: 10.1039/c6tb02724e] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
NIR photoresponsive PMO–Dox@MoS2–PEG nanoplatforms were constructed for synergistic chemo-photothermal therapy.
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