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Nhiem LT, Khanh Linh DT, Nguyen H, Hieu NH. Defect-Driven MoS 2 Nanosheets toward Enhanced Sensing Sensitivity. ACS OMEGA 2024; 9:27065-27070. [PMID: 38947855 PMCID: PMC11209701 DOI: 10.1021/acsomega.4c00379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Revised: 05/31/2024] [Accepted: 06/07/2024] [Indexed: 07/02/2024]
Abstract
In this study, S-deficient MoS2 was prepared using proton irradiation and then applied as sensing materials for the detection of NO2 gas. First, bulk MoS2 was treated by ultrasonics to produce 2D nanosheets of MoS2, which were subsequently bombarded by a flux of high-energy protons, resulting in the appearance of structural defects throughout MoS2. The proton fluxes were adjusted to different densities of 1 × 1011, 1 × 1012, 1 × 1013, and 1 × 1014 ions/cm2. The effects of proton irradiation on the defects, also referred to as atomic vacancies, were systematically investigated using Raman measurements to locate the E1 2g and A1g modes and X-ray photoelectron spectroscopy to determine the binding energy of Mo 3d and S 2p orbitals. It was revealed that the density of proton irradiation greatly affects the degree of S atom vacancies in irradiated MoS2, while also enhancing the n-type semiconducting behaviors of MoS2. The vacancy-rich MoS2 was then demonstrated to exhibit a higher response to NO2 gas compared to that of nonirradiated MoS2, showing a 4-fold increase in response within a concentration range from 1 to 20 ppm. These results could pave the way for new approaches to fabricating sensing materials.
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Affiliation(s)
- Ly Tan Nhiem
- Faculty
of Chemical and Food Technology, Ho Chi
Minh City University of Technology and Education, 01 Vo Van Ngan Street, Linh Chieu
Ward, Thu Duc City, Ho Chi Minh City 71300, Vietnam
| | - Do Thuy Khanh Linh
- Faculty
of Chemical and Food Technology, Ho Chi
Minh City University of Technology and Education, 01 Vo Van Ngan Street, Linh Chieu
Ward, Thu Duc City, Ho Chi Minh City 71300, Vietnam
| | - Hang Nguyen
- Development
Group, Samsung Display Vietnam Co., Ltd., Yen Phong Industrial Zone, Yen Phong District, Bac Ninh Province 00700, Vietnam
| | - Nguyen Huu Hieu
- VNU-HCM
Key Laboratory of Chemical Engineering and Petroleum Processing (Key
CEPP Lab), Ho Chi Minh City University of
Technology (HCMUT), 268
Ly Thuong Kiet Street, District 10, Ho Chi
Minh City 70000, Vietnam
- Faculty
of Chemical Engineering, Ho Chi Minh City
University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho
Chi Minh City 70000, Vietnam
- Vietnam
National University Ho Chi Minh City (VNU-HCM), Linh Trung Ward, Thu Duc City, Ho Chi Minh City 71300, Vietnam
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2
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Takhar D, Birajdar B, Ghosh RK. Dual functionality of the BiN monolayer: unraveling its photocatalytic and piezocatalytic water splitting properties. Phys Chem Chem Phys 2024; 26:16261-16272. [PMID: 38804603 DOI: 10.1039/d4cp01047g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2024]
Abstract
To achieve scalable and economically viable green hydrogen (H2) production, the photocatalytic and piezocatalytic processes are promising methods. The key to successful overall water splitting (OWS) for H2 production in these processes is using suitable semiconductor catalysts with appropriate band edge potentials, efficient optical absorption, higher mechanical flexibility, and piezoelectric coefficients. Thus, we explore the bismuth nitride (BiN) monolayer using density functional theory simulations, revealing intriguing catalytic properties. The BiN monolayer is a semiconductor with an indirect electronic bandgap (Eg) of 2.08 eV and displays excellent visible light absorption (approximately 105 cm-1). Detailed analyses show that the band edges satisfy the redox potential for photocatalytic OWS via biaxial strain engineering and pH variation. Notably, the solar to hydrogen conversion efficiency (ηSTH) for the BiN monolayer can reach 17.18%, which exceeds the 10% efficiency limit of photocatalysts for economical green H2 production. The obtained in-plane piezoelectric coefficient of e11 = 16.18 Å C m-1 is superior to widely studied 2D materials. Moreover, the generated piezopotential under oscillatory strain stands at 28.34 V, which can initiate the water redox reaction via the piezocatalytic mechanism. This originates from the mechanical flexibility coupled with higher piezoelectric coefficients. The result highlights the BiN monolayer's potential application in photocatalytic, piezocatalytic, and photo-piezo-catalytic OWS.
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Affiliation(s)
- Devender Takhar
- Special Centre for Nanoscience, Jawaharlal Nehru University, Delhi 110067, India
| | - Balaji Birajdar
- Special Centre for Nanoscience, Jawaharlal Nehru University, Delhi 110067, India
| | - Ram Krishna Ghosh
- Department of Electronics and Communication Engineering, Indraprastha Institute of Information Technology, Delhi 110020, India.
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3
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Sabbaghi S, Hosseinian E, Bazargan V. Strain-Assisted Phase Transformation in Two-Dimensional Transition-Metal Dichalcogenides. ACS APPLIED MATERIALS & INTERFACES 2024; 16:22676-22688. [PMID: 38632875 DOI: 10.1021/acsami.4c01503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/19/2024]
Abstract
Two-dimensional polymorphic transition-metal dichalcogenides have drawn attention for their diverse applications. This work explores the complex interplay between strain-induced phase transformation and crack growth behavior in annealed nanocrystalline MoS2. Employing molecular dynamics (MD) simulations, this research focuses on the effect of grain size, misorientation, and annealing on phase evolution and their effects on the mechanical behavior of MoS2. First, examining phase transformation in monocrystalline MoS2 under various stress states reveals distinct behaviors depending on the initial phase (1T or 2H) and crystallographic orientation with respect to loading directions. Notably, transformation from a layered hexagonal to a body-centered tetragonal structure is more noticeable when strain in a zigzag direction is applied to the 1T sample. As such, single crystalline MoS2 with a 1T phase exhibits a 16% lower fracture stress in the armchair direction compared to that with a 2H phase. On the other hand, the 1T phase shows a 5% higher phonon lifetime compared to the 2H phase with similar phonon group velocities. Next, the influence of thermal energy and mechanical stress on the phase transformation of nanocrystalline MoS2 is investigated through annealing and quenching cycles, uncovering 60 and 44% irreversibility of phase transformation for an average grain size of 3 and 11 nm, respectively. Besides, the evolution of nanocrystalline samples with different initial phases and grain sizes is studied under uniaxial and biaxial stress. This study shows an inverse pseudo-Hall-Petch effect with exponents of 0.11 and 0.09 for 2H and 1T, respectively. The study reveals that phase transformation can occur concurrently with crack initiation and propagation with the 1T phase exhibiting a 19% lower grain size sensitivity of fracture stress compared to the 2H phase.
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Affiliation(s)
- Soroush Sabbaghi
- Department of Mechanical Engineering, University of Tehran, P.O. Box 11155-4563, Tehran 14399-57131, Iran
| | - Ehsan Hosseinian
- Department of Mechanical Engineering, University of Tehran, P.O. Box 11155-4563, Tehran 14399-57131, Iran
| | - Vahid Bazargan
- Department of Mechanical Engineering, University of Tehran, P.O. Box 11155-4563, Tehran 14399-57131, Iran
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4
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Meganathan K, Mangamma G, Swaminadhan MJ, Murugan V, Shinde NB, Ghosh S, Eswaran SK. Thickness-Dependent Nanoscale Elastic Stiffening of Chemical Vapor Deposited Atomically Thin 2H-MoS 2 Films. J Phys Chem Lett 2024; 15:4206-4211. [PMID: 38598716 DOI: 10.1021/acs.jpclett.3c03512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/12/2024]
Abstract
Understanding the nanoscale elastic-size-effects of atomically thin transition-metal dichalcogenides (TMDs) as a function of thickness underpins the avenue of flexible 2D electronics. In this work, we employed the atomic force acoustic microscopy (AFAM) technique to investigate the thickness-dependent elastic properties of CVD grown 2H-MoS2 films. The monolayer MoS2 exhibited a Young's modulus of 273 ± 27 GPa. Our systematic analysis from bulk to monolayer suggests that the 2H-MoS2 phase exhibits nanoscale elastic-stiffening behavior with decreasing number of layers (thickness). The Young's modulus increased by a factor of ∼2.7 for monolayer MoS2 when compared with the bulk. First-principle DFT calculations affirm the nanoscale elastic-stiffening behavior of MoS2 with decreasing number of layers. Our findings suggest that the observed elastic stiffening is due to the interlayer sliding, which may be facilitated by defects in MoS2 layers. The observed elastic stiffening may be of potential importance for understanding TMD based nanomechanical devices.
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Affiliation(s)
- Kalaiarasan Meganathan
- 2D Materials and Devices Laboratory (2DML), Sir C. V. Raman Research Park, Department of Physics and Nanotechnology, SRM Institute of Science and Technology (SRMIST), Kattankulathur 603203, Chennai, India
| | - G Mangamma
- Surface and Nanoscience Division, Indira Gandhi Centre for Atomic Research (IGCAR), Kalpakkam 603102, Tamil Nadu, India
| | - M J Swaminadhan
- Materials Design Lab, Department of Physics and Nanotechnology, SRM Institute of Science and Technology (SRMIST), Kattankulathur 603203, Chennai, India
| | - Vijaykumar Murugan
- 2D Materials and Devices Laboratory (2DML), Sir C. V. Raman Research Park, Department of Physics and Nanotechnology, SRM Institute of Science and Technology (SRMIST), Kattankulathur 603203, Chennai, India
| | - Nitin Babu Shinde
- 2D Materials and Devices Laboratory (2DML), Sir C. V. Raman Research Park, Department of Physics and Nanotechnology, SRM Institute of Science and Technology (SRMIST), Kattankulathur 603203, Chennai, India
| | - Saurabh Ghosh
- Materials Design Lab, Department of Physics and Nanotechnology, SRM Institute of Science and Technology (SRMIST), Kattankulathur 603203, Chennai, India
| | - Senthil Kumar Eswaran
- 2D Materials and Devices Laboratory (2DML), Sir C. V. Raman Research Park, Department of Physics and Nanotechnology, SRM Institute of Science and Technology (SRMIST), Kattankulathur 603203, Chennai, India
- Nanotechnology Research Centre (NRC), SRM Institute of Science and Technology (SRMIST), Kattankulathur 603203, Chennai, India
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5
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Zhou K, Tang M, Zhang W, Chen Y, Guan Y, Huang R, Duan J, Liu Z, Ji X, Jiang Y, Hu Y, Zhang X, Zhou J, Chen M. Exposure to Molybdate Results in Metabolic Disorder: An Integrated Study of the Urine Elementome and Serum Metabolome in Mice. TOXICS 2024; 12:288. [PMID: 38668511 PMCID: PMC11053804 DOI: 10.3390/toxics12040288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Revised: 04/04/2024] [Accepted: 04/12/2024] [Indexed: 04/29/2024]
Abstract
The increasing use of molybdate has raised concerns about its potential toxicity in humans. However, the potential toxicity of molybdate under the current level of human exposure remains largely unknown. Endogenous metabolic alterations that are caused in humans by environmental exposure to pollutants are associated with the occurrence and progression of many diseases. This study exposed eight-week-old male C57 mice to sodium molybdate at doses relevant to humans (0.01 and 1 mg/kg/day) for eight weeks. Inductively coupled plasma mass spectrometry (ICP-MS) and ultra-performance liquid chromatography tandem mass spectrometry (UPLC-MS) were utilized to assess changes in urine element levels and serum metabolites in mice, respectively. A total of 838 subjects from the NHANES 2017-2018 population database were also included in our study to verify the associations between molybdenum and cadmium found in mice. Analysis of the metabolome in mice revealed that four metabolites in blood serum exhibited significant changes, including 5-aminolevulinic acid, glycolic acid, l-acetylcarnitine, and 2,3-dihydroxypropyl octanoate. Analysis of the elementome revealed a significant increase in urine levels of cadmium after molybdate exposure in mice. Notably, molybdenum also showed a positive correlation with cadmium in humans from the NHANES database. Further analysis identified a positive correlation between cadmium and 2,3-dihydroxypropyl octanoate in mice. In conclusion, these findings suggest that molybdate exposure disrupted amino acid and lipid metabolism, which may be partially mediated by molybdate-altered cadmium levels. The integration of elementome and metabolome data provides sensitive information on molybdate-induced metabolic disorders and associated toxicities at levels relevant to human exposure.
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Affiliation(s)
- Kun Zhou
- State Key Laboratory of Reproductive Medicine and Offspring Health, Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing 211166, China; (K.Z.); (M.T.); (Y.C.); (Y.G.); (R.H.); (J.D.); (Z.L.); (X.J.); (Y.J.); (J.Z.)
- Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 211166, China
- Department of Epidemiology, Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - Miaomiao Tang
- State Key Laboratory of Reproductive Medicine and Offspring Health, Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing 211166, China; (K.Z.); (M.T.); (Y.C.); (Y.G.); (R.H.); (J.D.); (Z.L.); (X.J.); (Y.J.); (J.Z.)
- Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - Wei Zhang
- Sir Run Run Hospital of Nanjing Medical University, Nanjing 211166, China; (W.Z.); (Y.H.)
| | - Yanling Chen
- State Key Laboratory of Reproductive Medicine and Offspring Health, Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing 211166, China; (K.Z.); (M.T.); (Y.C.); (Y.G.); (R.H.); (J.D.); (Z.L.); (X.J.); (Y.J.); (J.Z.)
- Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - Yusheng Guan
- State Key Laboratory of Reproductive Medicine and Offspring Health, Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing 211166, China; (K.Z.); (M.T.); (Y.C.); (Y.G.); (R.H.); (J.D.); (Z.L.); (X.J.); (Y.J.); (J.Z.)
- Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - Rui Huang
- State Key Laboratory of Reproductive Medicine and Offspring Health, Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing 211166, China; (K.Z.); (M.T.); (Y.C.); (Y.G.); (R.H.); (J.D.); (Z.L.); (X.J.); (Y.J.); (J.Z.)
- Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - Jiawei Duan
- State Key Laboratory of Reproductive Medicine and Offspring Health, Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing 211166, China; (K.Z.); (M.T.); (Y.C.); (Y.G.); (R.H.); (J.D.); (Z.L.); (X.J.); (Y.J.); (J.Z.)
- Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - Zibo Liu
- State Key Laboratory of Reproductive Medicine and Offspring Health, Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing 211166, China; (K.Z.); (M.T.); (Y.C.); (Y.G.); (R.H.); (J.D.); (Z.L.); (X.J.); (Y.J.); (J.Z.)
- Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - Xiaoming Ji
- State Key Laboratory of Reproductive Medicine and Offspring Health, Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing 211166, China; (K.Z.); (M.T.); (Y.C.); (Y.G.); (R.H.); (J.D.); (Z.L.); (X.J.); (Y.J.); (J.Z.)
- Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - Yingtong Jiang
- State Key Laboratory of Reproductive Medicine and Offspring Health, Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing 211166, China; (K.Z.); (M.T.); (Y.C.); (Y.G.); (R.H.); (J.D.); (Z.L.); (X.J.); (Y.J.); (J.Z.)
- Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - Yanhui Hu
- Sir Run Run Hospital of Nanjing Medical University, Nanjing 211166, China; (W.Z.); (Y.H.)
| | - Xiaoling Zhang
- Department of Hygienic Analysis and Detection, Nanjing Medical University, Nanjing 211166, China;
| | - Jingjing Zhou
- State Key Laboratory of Reproductive Medicine and Offspring Health, Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing 211166, China; (K.Z.); (M.T.); (Y.C.); (Y.G.); (R.H.); (J.D.); (Z.L.); (X.J.); (Y.J.); (J.Z.)
- Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - Minjian Chen
- State Key Laboratory of Reproductive Medicine and Offspring Health, Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing 211166, China; (K.Z.); (M.T.); (Y.C.); (Y.G.); (R.H.); (J.D.); (Z.L.); (X.J.); (Y.J.); (J.Z.)
- Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 211166, China
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6
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Ogunkunle SA, Bouzid A, Hinsch JJ, Allen OJ, White JJ, Bernard S, Wu Z, Zhu Y, Wang Y. Defect engineering of 1T' MX2( M= Mo, W and X= S, Se) transition metal dichalcogenide-based electrocatalyst for alkaline hydrogen evolution reaction. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2024; 36:145002. [PMID: 38157553 DOI: 10.1088/1361-648x/ad19a4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Accepted: 12/28/2023] [Indexed: 01/03/2024]
Abstract
The alkaline electrolyzer (AEL) is a promising device for green hydrogen production. However, their energy conversion efficiency is currently limited by the low performance of the electrocatalysts for the hydrogen evolution reaction (HER). As such, the electrocatalyst design for the high-performance HER becomes essential for the advancement of AELs. In this work, we used both hydrogen (H) and hydroxyl (OH) adsorption Gibbs free energy changes as the descriptors to investigate the catalytic HER performance of 1T' transition metal dichalcogenides (TMDs) in an alkaline solution. Our results reveal that the pristine sulfides showed better alkaline HER performance than their selenide counterparts. However, the activities of all pristine 1T' TMDs are too low to dissociate water. To improve the performance of these materials, defect engineering techniques were used to design TMD-based electrocatalysts for effective HER activity. Our density functional theory results demonstrate that introducing single S/Se vacancy defects can improve the reactivities of TMD materials. Yet, the desorption of OH becomes the rate-determining step. Doping defective MoS2with late 3d transition metal (TM) atoms, especially Cu, Ni, and Co, can regulate the reactivity of active sites for optimal OH desorption. As a result, the TM-doped defective 1T' MoS2can significantly enhance the alkaline HER performance. These findings highlight the potential of defect engineering technologies for the design of TMD-based alkaline HER electrocatalysts.
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Affiliation(s)
- Samuel Akinlolu Ogunkunle
- Centre for Clean Environment and Energy, School of Environment and Science, Griffith University, Gold Coast Campus, Southport 4222, Australia
| | - Assil Bouzid
- Institut de Recherche sur les Céramiques (IRCER), UMR CNRS 7315-Université de Limoges, Limoges 87068, France
| | - Jack Jon Hinsch
- Centre for Clean Environment and Energy, School of Environment and Science, Griffith University, Gold Coast Campus, Southport 4222, Australia
| | - Oscar J Allen
- Centre for Clean Environment and Energy, School of Environment and Science, Griffith University, Gold Coast Campus, Southport 4222, Australia
| | - Jessica Jein White
- Centre for Clean Environment and Energy, School of Environment and Science, Griffith University, Gold Coast Campus, Southport 4222, Australia
| | - Samuel Bernard
- Institut de Recherche sur les Céramiques (IRCER), UMR CNRS 7315-Université de Limoges, Limoges 87068, France
| | - Zhenzhen Wu
- Centre for Clean Environment and Energy, School of Environment and Science, Griffith University, Gold Coast Campus, Southport 4222, Australia
| | - Yong Zhu
- School of Engineering and Built Environment, Griffith University, Gold Coast Campus, Southport 4222, Australia
| | - Yun Wang
- Centre for Clean Environment and Energy, School of Environment and Science, Griffith University, Gold Coast Campus, Southport 4222, Australia
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7
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Steeger P, Graalmann JH, Schmidt R, Kupenko I, Sanchez-Valle C, Marauhn P, Deilmann T, de Vasconcellos SM, Rohlfing M, Bratschitsch R. Pressure Dependence of Intra- and Interlayer Excitons in 2H-MoS 2 Bilayers. NANO LETTERS 2023; 23:8947-8952. [PMID: 37734032 DOI: 10.1021/acs.nanolett.3c02428] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/23/2023]
Abstract
The optical and electronic properties of multilayer transition metal dichalcogenides differ significantly from their monolayer counterparts due to interlayer interactions. The separation of individual layers can be tuned in a controlled way by applying pressure. Here, we use a diamond anvil cell to compress bilayers of 2H-MoS2 in the gigapascal range. By measuring optical transmission spectra, we find that increasing pressure leads to a decrease in the energy splitting between the A and the interlayer exciton. Comparing our experimental findings with ab initio calculations, we conclude that the observed changes are not due to the commonly assumed hydrostatic compression. This effect is attributed to the MoS2 bilayer adhering to the diamond, which reduces the in-plane compression. Moreover, we demonstrate that the distinct real-space distributions and resulting contributions from the valence band account for the different pressure dependencies of the inter- and intralayer excitons in compressed MoS2 bilayers.
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Affiliation(s)
- Paul Steeger
- Institute of Physics and Center for Nanotechnology, University of Münster, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany
| | - Jan-Hauke Graalmann
- Institute of Solid State Theory, University of Münster, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany
| | - Robert Schmidt
- Institute of Physics and Center for Nanotechnology, University of Münster, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany
| | - Ilya Kupenko
- Institute of Mineralogy, University of Münster, Corrensstr. 24, 48149 Münster, Germany
| | - Carmen Sanchez-Valle
- Institute of Mineralogy, University of Münster, Corrensstr. 24, 48149 Münster, Germany
| | - Philipp Marauhn
- Institute of Solid State Theory, University of Münster, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany
| | - Thorsten Deilmann
- Institute of Solid State Theory, University of Münster, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany
| | | | - Michael Rohlfing
- Institute of Solid State Theory, University of Münster, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany
| | - Rudolf Bratschitsch
- Institute of Physics and Center for Nanotechnology, University of Münster, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany
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8
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Kazemi SA, Imani Yengejeh S, Ogunkunle SA, Zhang L, Wen W, Wee-Chung Liew A, Wang Y. Vacancy impacts on electronic and mechanical properties of MX2 (M = Mo, W and X = S, Se) monolayers. RSC Adv 2023; 13:6498-6506. [PMID: 36845596 PMCID: PMC9951067 DOI: 10.1039/d3ra00205e] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Accepted: 02/20/2023] [Indexed: 02/26/2023] Open
Abstract
Monolayers of transition metal dichalcogenides (TMD) exhibit excellent mechanical and electrical characteristics. Previous studies have shown that vacancies are frequently created during the synthesis, which can alter the physicochemical characteristics of TMDs. Even though the properties of pristine TMD structures are well studied, the effects of vacancies on the electrical and mechanical properties have received far less attention. In this paper, we applied first-principles density functional theory (DFT) to comparatively investigate the properties of defective TMD monolayers including molybdenum disulfide (MoS2), molybdenum diselenide (MoSe2), tungsten disulfide (WS2), and tungsten diselenide (WSe2). The impacts of six types of anion or metal complex vacancies were studied. According to our findings, the electronic and mechanical properties are slightly impacted by anion vacancy defects. In contrast, vacancies in metal complexes considerably affect their electronic and mechanical properties. Additionally, the mechanical properties of TMDs are significantly influenced by both their structural phases and anions. Specifically, defective diselenides become more mechanically unstable due to the comparatively poor bonding strength between Se and metal based on the analysis of the crystal orbital Hamilton population (COHP). The outcomes of this study may provide the theoretical knowledge base to boost more applications of the TMD systems through defect engineering.
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Affiliation(s)
- Seyedeh Alieh Kazemi
- Centre for Catalysis and Clean Energy, School of Environment and Science, Griffith University Gold Coast Campus QLD 4222 Australia
| | - Sadegh Imani Yengejeh
- Centre for Catalysis and Clean Energy, School of Environment and Science, Griffith University Gold Coast Campus QLD 4222 Australia
| | - Samuel Akinlolu Ogunkunle
- Centre for Catalysis and Clean Energy, School of Environment and Science, Griffith University Gold Coast Campus QLD 4222 Australia
| | - Lei Zhang
- Centre for Catalysis and Clean Energy, School of Environment and Science, Griffith University Gold Coast Campus QLD 4222 Australia
| | - William Wen
- Centre for Catalysis and Clean Energy, School of Environment and Science, Griffith University Gold Coast Campus QLD 4222 Australia
| | - Alan Wee-Chung Liew
- School of Information and Communication Technology, Griffith UniversityGold CoastQueensland 4215Australia
| | - Yun Wang
- Centre for Catalysis and Clean Energy, School of Environment and Science, Griffith University Gold Coast Campus QLD 4222 Australia
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9
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Sharma C, Srivastava AK, Gupta MK. Unusual nanoscale piezoelectricity-driven high current generation from a self S-defect-neutralised few-layered MoS 2 nanosheet-based flexible nanogenerator. NANOSCALE 2022; 14:12885-12897. [PMID: 36040404 DOI: 10.1039/d2nr02347d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
We report the fabrication of a high-performance flexible piezoelectric nanogenerator based on S-defect-neutralised few-layered molybdenum disulphide (MoS2) nanosheets. High-resolution transmission electron microscopy (HR-TEM) and Raman spectroscopy confirmed the number of stacked layers in the MoS2 sheets to be 3-5. The defect, electronic and chemical states of the as-grown MoS2 nanosheets were investigated by X-ray photoelectron spectroscopy (XPS). An as-fabricated MoS2 nanogenerator with a CNT electrode generates an excellent high output voltage of 22 V and a record-high output current density of 9.00 μA cm-2 under a small vertical compressive force of 1.5 kgf. The piezoelectric charge coefficient of the 2D MoS2 nanosheets was investigated using piezoelectric force microscopy (PFM), and a very high piezoelectric charge coefficient (d33) of 120 pm V-1 was obtained. The energy conversion efficiency of the device was about 30%. Moreover, the MoS2 nanosheets show a high dielectric constant of about 2649 at low frequency. The results suggest that the absence of S-defects can reduce the free charge carrier and screening effect, resulting in a high output voltage and current density. The performance of the nanogenerator is discussed in terms of its high d33, high dielectric constant, the crystalline mixed phase of MoS2 and the electronic state of the MoS2 nanosheets.
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Affiliation(s)
- Charu Sharma
- CSIR-Advanced Materials and Processes Research Institute, Bhopal, Madhya Pradesh 462026, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India.
| | - Avanish Kumar Srivastava
- CSIR-Advanced Materials and Processes Research Institute, Bhopal, Madhya Pradesh 462026, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India.
| | - Manoj Kumar Gupta
- CSIR-Advanced Materials and Processes Research Institute, Bhopal, Madhya Pradesh 462026, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India.
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10
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First-Principles Calculations to Investigate the Oxidation Mechanism of Pristine MoS2 and Ti-Doped MoS2. COATINGS 2022. [DOI: 10.3390/coatings12081114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Generally, MoS2 is easily oxidized when exposed to oxygen, and the antioxidation mechanism of MoS2 is still a challenge. Thus, more efforts were made to greatly improve its antioxidation performance. It was reported that the Ti atom doped with MoS2 was treated as the effective method to enhance its antioxidation performance; however, the detailed antioxidation mechanism was not well understood. Superior to experimental methods, the first-principles method could provide deep insight into the atomic information and serve as a useful tool to gain an understanding of the antioxidation mechanisms of the doped MoS2; thus, the antioxidation behavior of the Ti-doped MoS2 was investigated in detail using first-principles calculations. However, an opposing conclusion was obtained from the calculated results compared to the previous experimental results; that is, the incorporation of the Ti atom was not helpful for improving the antioxidation performance of MoS2. The strange phenomenon was well probed and discussed in detail, and understanding the oxidation mechanism of the Ti-doped MoS2 would be helpful for expanding its applications in the ambient atmosphere.
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11
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Li JW, Ke SS, Deng HX, Sun X, Guo Y, Lü HF. Defect modulated electronic structure and magnetism in the 1T′ phase of Janus MoSSe. Chem Phys 2022. [DOI: 10.1016/j.chemphys.2021.111440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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12
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Kazemi SA, Imani Yengejeh S, Wang V, Wen W, Wang Y. Theoretical understanding of electronic and mechanical properties of 1T' transition metal dichalcogenide crystals. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2022; 13:160-171. [PMID: 35186650 PMCID: PMC8822467 DOI: 10.3762/bjnano.13.11] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Accepted: 01/21/2022] [Indexed: 06/14/2023]
Abstract
Transition metal dichalcogenides (TMDs) with a 1T' layer structure have recently received intense interest due to their outstanding physical and chemical properties. While the physicochemical behaviors of 1T' TMD monolayers have been widely investigated, the corresponding properties of layered 1T' TMD crystals have rarely been studied. As TMD monolayers do not have interlayer interactions, their physicochemical properties will differ from those of layered TMD materials. In this study, the electronic and mechanical characteristics of a range of 1T' TMDs are systematically examined by means of density functional theory (DFT) calculations. Our results reveal that the properties of 1T' TMDs are mainly affected by their anions. The disulfides are stiffer and more rigid, diselenides are more brittle. In addition, the 1T' polytype is softer than 2H TMDs. Comparison with the properties of the monolayers shows that the interlayer van der Waals forces can slightly weaken the TM-X covalent bonding strength, which can further influence the mechanical properties. These insights revealed by our theoretical studies may boost more applications of 1T' TMD materials.
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Affiliation(s)
- Seyedeh Alieh Kazemi
- Centre for Catalysis and Clean Energy, School of Environment and Science, Griffith University, Gold Coast Campus, QLD 4222, Australia
| | - Sadegh Imani Yengejeh
- Centre for Catalysis and Clean Energy, School of Environment and Science, Griffith University, Gold Coast Campus, QLD 4222, Australia
| | - Vei Wang
- Department of Applied Physics, Xi’an University of Technology, Xi’an 710054, China
| | - William Wen
- Centre for Catalysis and Clean Energy, School of Environment and Science, Griffith University, Gold Coast Campus, QLD 4222, Australia
| | - Yun Wang
- Centre for Catalysis and Clean Energy, School of Environment and Science, Griffith University, Gold Coast Campus, QLD 4222, Australia
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13
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Jia Y, Yin G, Lin Y, Ma Y. Recent progress of hierarchical MoS2 nanostructures for electrochemical energy storage. CrystEngComm 2022. [DOI: 10.1039/d1ce01439k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Hierarchical MoS2 nanostructures are of increasing importance in energy storage via batteries or supercapacitors. Herein, the various hierarchical MoS2 materials as electrochemical electrode are reviewed in detail by classifying the...
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14
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Ouyang W, Sofer R, Gao X, Hermann J, Tkatchenko A, Kronik L, Urbakh M, Hod O. Anisotropic Interlayer Force Field for Transition Metal Dichalcogenides: The Case of Molybdenum Disulfide. J Chem Theory Comput 2021; 17:7237-7245. [PMID: 34719931 PMCID: PMC8592503 DOI: 10.1021/acs.jctc.1c00782] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Indexed: 11/28/2022]
Abstract
An anisotropic interlayer force field that describes the interlayer interactions in molybdenum disulfide (MoS2) is presented. The force field is benchmarked against density functional theory calculations for both bilayer and bulk systems within the Heyd-Scuseria-Ernzerhof hybrid density functional approximation, augmented by a nonlocal many-body dispersion treatment of long-range correlation. The parametrization yields good agreement with the reference calculations of binding energy curves and sliding potential energy surfaces for both bilayer and bulk configurations. Benchmark calculations for the phonon spectra of bulk MoS2 provide good agreement with experimental data, and the calculated bulk modulus falls in the lower part of experimentally measured values. This indicates the accuracy of the interlayer force field near equilibrium. Under external pressures up to 20 GPa, the developed force field provides a good description of compression curves. At higher pressures, deviations from experimental data grow, signifying the validity range of the developed force field.
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Affiliation(s)
- Wengen Ouyang
- Department
of Engineering Mechanics, School of Civil Engineering, Wuhan University, Wuhan, Hubei 430072, China
| | - Reut Sofer
- School
of Chemistry and The Sackler Center for Computational Molecular and
Materials Science, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Xiang Gao
- School
of Chemistry and The Sackler Center for Computational Molecular and
Materials Science, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Jan Hermann
- Machine
Learning Group, TU Berlin, Marchstr. 23, 10587 Berlin, Germany
- Department
of Mathematics, FU Berlin, Arnimallee 14, 14195 Berlin, Germany
| | - Alexandre Tkatchenko
- Department
of Physics and Materials Science, University
of Luxembourg, L-1511 Luxembourg City, Luxembourg
| | - Leeor Kronik
- Department
of Molecular Chemistry and Materials Science, Weizmann Institute of Science, Rehovoth 76100, Israel
| | - Michael Urbakh
- School
of Chemistry and The Sackler Center for Computational Molecular and
Materials Science, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Oded Hod
- School
of Chemistry and The Sackler Center for Computational Molecular and
Materials Science, Tel Aviv University, Tel Aviv 6997801, Israel
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15
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Yang K, Liu T, Zhang XD. Bandgap Engineering and Near-Infrared-II Optical Properties of Monolayer MoS 2: A First-Principle Study. Front Chem 2021; 9:700250. [PMID: 34222202 PMCID: PMC8253311 DOI: 10.3389/fchem.2021.700250] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2021] [Accepted: 05/27/2021] [Indexed: 11/13/2022] Open
Abstract
The fluorescence-based optical imaging in the second near-infrared region (NIR-II, 1,000-1,700 nm) has broad applications in the biomedical field, but it is still difficult to find new NIR-II fluorescence materials in the two dimension. As a crucial characteristic of the electronic structure, the band structure determines the fundamental properties of two-dimensional materials, such as their optical excitations and electronic transportation. Therefore, we calculated the electronic structures and optical properties of different crystalline phases (1T phase and 2H phase) of pure monolayer MoS2 films and found that the 1T phase has better absorption and thus better fluorescence in the NIR-II window. However, its poor stability makes the 1T-phase MoS2 less useful in vivo bioimaging. By introducing vacancy defects and doping with foreign atoms, we successfully tuned the bandgap of the monolayer 2H-MoS2 and activated it in the NIR-II. Our results show that by engineering the vacancy defects, the bandgap of the 2H phase can be tailored to around 1 eV, and there are three candidates of vacancy structures that exhibit strong absorption in the NIR-II.
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Affiliation(s)
- Ke Yang
- Department of Physics and Center for Joint Quantum Studies, School of Science, Tianjin University, Tianjin, China
| | - Tianyu Liu
- Department of Physics and Center for Joint Quantum Studies, School of Science, Tianjin University, Tianjin, China
| | - Xiao-Dong Zhang
- Tianjin Key Laboratory of Brain Science and Neural Engineering, Academy of Medical Engineering and Translational Medicine, Tianjin University, Tianjin, China
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16
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Imani Yengejeh S, Kazemi SA, Wen W, Wang Y. Multiscale numerical simulation of in-plane mechanical properties of two-dimensional monolayers. RSC Adv 2021; 11:20232-20247. [PMID: 35479920 PMCID: PMC9033945 DOI: 10.1039/d1ra01924d] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Accepted: 05/28/2021] [Indexed: 12/27/2022] Open
Abstract
Many applications of two dimensional (2D) materials are often achieved through strain engineering, which is directly dependent on their in-plane mechanical characteristics. Therefore, understanding the in-plane mechanical characteristics of the 2D monolayers becomes imperative. Nevertheless, direct experimental measurements of in-plane mechanical properties of 2D monolayers face great difficulties due to the issues related to the availability of high-quality 2D materials and sophisticated facilities. As an alternative, numerical simulation has the potential to theoretically predict such properties. This review presents some recent progress in numerically exploring the in-plane mechanical properties of 2D materials, including first-principles density functional theory, force-field based classical molecular dynamics, and the finite-element method. The relevant case studies are provided to describe the applications of these methods along with their pros and cons. We hope that the multiscale simulation methods discussed in this review will inspire new ideas and boost further advances of the computational study on the in-plane mechanical properties of 2D materials. The recent progress of multiscale numeric methods for investigating in-plane mechanical properties of 2D monolayers is reviewed.![]()
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Affiliation(s)
- Sadegh Imani Yengejeh
- Centre for Catalysis and Clean Energy, School of Environment and Science, Griffith University Gold Coast Campus QLD 4222 Australia
| | - Seyedeh Alieh Kazemi
- Centre for Catalysis and Clean Energy, School of Environment and Science, Griffith University Gold Coast Campus QLD 4222 Australia
| | - William Wen
- Centre for Catalysis and Clean Energy, School of Environment and Science, Griffith University Gold Coast Campus QLD 4222 Australia
| | - Yun Wang
- Centre for Catalysis and Clean Energy, School of Environment and Science, Griffith University Gold Coast Campus QLD 4222 Australia
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17
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Zhu M, Du X, Liu S, Li J, Wang Z, Ono T. A review of strain sensors based on two-dimensional molybdenum disulfide. JOURNAL OF MATERIALS CHEMISTRY C 2021. [DOI: 10.1039/d1tc02102h] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
This review covers a short introduction to the structure, properties, and synthesis methods of MoS2. Emphasis is given to the different categories of strain sensing mechanisms and device architectures, which enable a high gauge factor (GF).
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Affiliation(s)
- Minjie Zhu
- Sensor and Network Control Center
- Instrumentation Technology and Economy Institute
- Beijing 100055
- China
| | - Xiaohui Du
- Sensor and Network Control Center
- Instrumentation Technology and Economy Institute
- Beijing 100055
- China
| | - Shuai Liu
- Sensor and Network Control Center
- Instrumentation Technology and Economy Institute
- Beijing 100055
- China
| | - Jinhua Li
- School of Mechanical Engineering
- Sichuan University
- Chengdu
- China
| | - Zhuqing Wang
- School of Mechanical Engineering
- Sichuan University
- Chengdu
- China
- Med+X Center for Manufacturing, West China Hospital, Sichuan University, Chengdu
| | - Takahito Ono
- Graduate School of Engineering, Tohoku University, Sendai
- Miyagi 980-8579
- Japan
- Micro System Integration Center, Tohoku University, Sendai
- Miyagi 980-0845
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18
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Monti JM, Robbins MO. Sliding Friction of Amorphous Asperities on Crystalline Substrates: Scaling with Contact Radius and Substrate Thickness. ACS NANO 2020; 14:16997-17003. [PMID: 33226231 DOI: 10.1021/acsnano.0c06241] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Disorder in the contact between an amorphous slider and a crystalline substrate leads to a cancellation of lateral forces. Atomically flat, rigid surfaces exhibit structural superlubricity, with the frictional stress in circular contacts of radius a vanishing as 1/a. The inclusion of elasticity allows relative motion of domains on the surface in response to the random interfacial forces. The competition between disorder and elastic deformation is predicted to limit structural superlubricity and produce a constant frictional stress for a larger than a characteristic domain size λ that depends on the ratio of the shear modulus G to the magnitude of interfacial shear stresses τ0. Extensive simulations of a flat, amorphous punch sliding on a crystalline substrate with different system sizes and G/τ0 are used to test scaling predictions and determine unknown prefactors that are needed for quantitative analysis. For bulk systems, we find an exponential decrease of the large a frictional stress and 1/λ with increasing G/τ0. For thin free-standing films, the stress and 1/λ are inversely proportional to G/τ0. These results may help explain the size-dependent friction of nanoparticles and plate-like materials used as solid lubricants.
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Affiliation(s)
- Joseph M Monti
- Department of Physics and Astronomy, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Mark O Robbins
- Department of Physics and Astronomy, Johns Hopkins University, Baltimore, Maryland 21218, United States
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