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Rai J, Kumar K, Verma MK, Sharma M. Impact of passivation on GaS nanoflakes: A study on stability, electronic, spectroscopy, and photocatalytic properties. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 326:125173. [PMID: 39342723 DOI: 10.1016/j.saa.2024.125173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2024] [Revised: 09/07/2024] [Accepted: 09/18/2024] [Indexed: 10/01/2024]
Abstract
This study uses first-principle calculations to investigate the properties of pristine and passivated gallium sulfide nanoflakes. Passivation significantly enhances stability, with fluorinated nanoflakes being the most stable and pristine nanoflakes the least stable, having formation energies of -0.058 eV/atom and -0.009 eV/atom, respectively. The pristine and passivated nanoflakes show semiconducting band gap, which lies in a visible region. Hydrogenated nanoflakes exhibit the largest band gap of 3.62 eV, making them highly suitable for photocatalysis, while fluorine and chlorine passivation result in band gaps of 3.16 eV and 3.01 eV. Scanning tunneling microscopy reveals distinct topographical features for each passivated nanoflake, affecting their electronic properties, including negative differential conductance, making it suitable for advanced switching devices and sensors. The quantum capacitance value of 815 µF/cm2 for chlorinated nanoflakes suggests that passivated nanoflakes could be beneficial for supercapacitor applications. Spectroscopic studies show that passivation changes the infrared spectrum and moves absorption spectra from the ultraviolet to the visible range. The hydrogenated nanoflakes are found ideal for water splitting, and adjusting the pH can further optimize its photocatalytic performance. These findings highlight the potential of passivated nanoflakes in photovoltaics, biomedical imaging, photocatalysis, and advanced technological devices.
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Affiliation(s)
- Jyoti Rai
- Department of Chemistry, School of Basic and Applied Sciences, Maharaja Agrasen University, Himachal Pradesh 174103, India
| | - Kuldeep Kumar
- Department of Physics, School of Basic and Applied Sciences, Maharaja Agrasen University, Himachal Pradesh 174103, India
| | - Mukesh Kumar Verma
- Department of Chemistry, School of Basic and Applied Sciences, Maharaja Agrasen University, Himachal Pradesh 174103, India.
| | - Munish Sharma
- Department of Physics, School of Basic and Applied Sciences, Maharaja Agrasen University, Himachal Pradesh 174103, India.
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2
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Nguyen SH, Nguyen VN, Tran MT. Bacillus subtilis DNA fluorescent sensors based on hybrid MoS2 nanosheets. PLoS One 2024; 19:e0297581. [PMID: 38300971 PMCID: PMC10833578 DOI: 10.1371/journal.pone.0297581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Accepted: 01/08/2024] [Indexed: 02/03/2024] Open
Abstract
Although sensor technology has advanced with better materials, biomarkers, and fabrication and detection methods, creating a rapid, accurate, and affordable bacterial detection platform is still a major challenge. In this study, we present a combination of hybrid-MoS2 nanosheets and an amine-customized probe to develop a fast, sensitive biosensor for Bacillus subtilis DNA detection. Based on fluorescence measurements, the biosensor exhibits a detection range of 23.6-130 aM, achieves a detection limit of 18.7 aM, and was stable over four weeks. In addition, the high selectivity over Escherichia coli and Vibrio proteolyticus DNAs of the proposed Bacillus subtilis sensors is demonstrated by the fluorescence quenching effect at 558 nm. This research not only presents a powerful tool for B. subtilis DNA detection but also significantly contributes to the advancement of hybrid 2D nanomaterial-based biosensors, offering substantial promise for diverse applications in biomedical research and environmental monitoring.
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Affiliation(s)
- Son Hai Nguyen
- School of Mechanical Engineering, Hanoi University of Science and Technology, Hanoi, Vietnam
| | - Van-Nhat Nguyen
- College of Engineering and Computer Science, VinUniversity, Hanoi, Vietnam
| | - Mai Thi Tran
- College of Engineering and Computer Science, VinUniversity, Hanoi, Vietnam
- VinUni-Illinois Smart Health Center, VinUniversity, Hanoi, Vietnam
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Bharti S, Tripathi SK, Singh K. Recent progress in MoS 2 nanostructures for biomedical applications: Experimental and computational approach. Anal Biochem 2024; 685:115404. [PMID: 37993043 DOI: 10.1016/j.ab.2023.115404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 11/07/2023] [Accepted: 11/16/2023] [Indexed: 11/24/2023]
Abstract
In the category of 2D materials, MoS2 a transition metal dichalcogenide, is a novel and intriguing class of materials with interesting physicochemical properties, explored in applications ranging from cutting-edge optoelectronic to the frontiers of biomedical and biotechnology. MoS2 nanostructures an alternative to heavy toxic metals exhibit biocompatibility, low toxicity and high stability, and high binding affinity to biomolecules. MoS2 nanostructures provide a lot of opportunities for the advancement of novel biosensing, nanodrug delivery system, electrochemical detection, bioimaging, and photothermal therapy. Much efforts have been made in recent years to improve their physiochemical properties by developing a better synthesis approach, surface functionalization, and biocompatibility for their safe use in the advancement of biomedical applications. The understanding of parameters involved during the development of nanostructures for their safe utilization in biomedical applications has been discussed. Computational studies are included in this article to understand better the properties of MoS2 and the mechanism involved in their interaction with biomolecules. As a result, we anticipate that this combined experimental and computational studies of MoS2 will inspire the development of nanostructures with smart drug delivery systems, and add value to the understanding of two-dimensional smart nano-carriers.
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Affiliation(s)
- Shivani Bharti
- School of Physical Sciences, Jawaharlal Nehru University, New Delhi, 110067, India
| | - S K Tripathi
- Department of Physics, Panjab University, Chandigarh, 160014, India
| | - Kedar Singh
- School of Physical Sciences, Jawaharlal Nehru University, New Delhi, 110067, India.
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Li J, Zhou Y, Liu K, Wang Y, Li H, Okulov A. Tunable Electronic Transport of New-Type 2D Iodine Materials Affected by the Doping of Metal Elements. Molecules 2023; 28:7159. [PMID: 37894638 PMCID: PMC10609309 DOI: 10.3390/molecules28207159] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 10/13/2023] [Accepted: 10/16/2023] [Indexed: 10/29/2023] Open
Abstract
2D iodine structures under high pressures are more attractive and valuable due to their special structures and excellent properties. Here, electronic transport properties of such 2D iodine structures are theoretically studied by considering the influence of the metal-element doping. In equilibrium, metal elements in Group 1 can enhance the conductance dramatically and show a better enhancement effect. Around the Fermi level, the transmission probability exceeds 1 and can be improved by the metal-element doping for all devices. In particular, the device density of states explains well the distinctions between transmission coefficients originating from different doping methods. Contrary to the "big" site doping, the "small" site doping changes transmission eigenstates greatly, with pronounced electronic states around doped atoms. In non-equilibrium, the conductance of all devices is almost weaker than the equilibrium conductance, decreasing at low voltages and fluctuating at high voltages with various amplitudes. Under biases, K-big doping shows the optimal enhancement effect, and Mg-small doping exhibits the most effective attenuation effect on conductance. Contrastingly, the currents of all devices increase with bias linearly. The metal-element doping can boost current at low biases and weaken current at high voltages. These findings contribute much to understanding the effects of defects on electronic properties and provide solid support for the application of new-type 2D iodine materials in controllable electronics and sensors.
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Affiliation(s)
- Jie Li
- School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212100, China; (Y.Z.); (K.L.); (Y.W.)
| | - Yuchen Zhou
- School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212100, China; (Y.Z.); (K.L.); (Y.W.)
| | - Kun Liu
- School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212100, China; (Y.Z.); (K.L.); (Y.W.)
| | - Yifan Wang
- School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212100, China; (Y.Z.); (K.L.); (Y.W.)
| | - Hui Li
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, China
| | - Artem Okulov
- M.N. Mikheev Institute of Metal Physics, Ural Branch of Russian Academy of Sciences, Ekaterinburg 620077, Russia;
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Gilbert SJ, Li M, Chen JS, Yi H, Lipatov A, Avila J, Sinitskii A, Asensio MC, Dowben PA, Yost AJ. Chiral photocurrent in a Quasi-1D TiS 3(001) phototransistor. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2023; 35:124003. [PMID: 36689777 DOI: 10.1088/1361-648x/acb581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Accepted: 01/23/2023] [Indexed: 06/17/2023]
Abstract
The presence of in-plane chiral effects, hence spin-orbit coupling, is evident in the changes in the photocurrent produced in a TiS3(001) field-effect phototransistor with left versus right circularly polarized light. The direction of the photocurrent is protected by the presence of strong spin-orbit coupling and the anisotropy of the band structure as indicated in NanoARPES measurements. Dark electronic transport measurements indicate that TiS3is n-type and has an electron mobility in the range of 1-6 cm2V-1s-1.I-Vmeasurements under laser illumination indicate the photocurrent exhibits a bias directionality dependence, reminiscent of bipolar spin diode behavior. Because the TiS3contains no heavy elements, the presence of spin-orbit coupling must be attributed to the observed loss of inversion symmetry at the TiS3(001) surface.
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Affiliation(s)
- Simeon J Gilbert
- Department of Physics and Astronomy, University of Nebraska-Lincoln, Lincoln, NE 68588-0299, United States of America
| | - Mingxing Li
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY 11973, United States of America
| | - Jia-Shiang Chen
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY 11973, United States of America
| | - Hemian Yi
- Synchrotron SOLEIL and Université Paris-Saclay, L'Orme des Merisiers, BP48, 91190 Saint-Aubin, France
| | - Alexey Lipatov
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, NE 68588-0304, United States of America
| | - Jose Avila
- Synchrotron SOLEIL and Université Paris-Saclay, L'Orme des Merisiers, BP48, 91190 Saint-Aubin, France
| | - Alexander Sinitskii
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, NE 68588-0304, United States of America
| | - Maria C Asensio
- Materials Science Institute of Madrid (ICMM), Spanish Scientific Research Council (CSIC), and MATINÉE: the CSIC Research Associated between the Institute of Materiasl Sciences of the Valencia University (ICMUV) and the ICMM, Cantoblanco, E-28049 Madrid, Spain
| | - Peter A Dowben
- Department of Physics and Astronomy, University of Nebraska-Lincoln, Lincoln, NE 68588-0299, United States of America
| | - Andrew J Yost
- Department of Physics, Oklahoma State University, Stillwater, OK 74078-3072, United States of America
- Oklahoma Photovoltaic Research Institute, Oklahoma State University, Stillwater, OK, United States of America
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Dhingra A. Layered GeI2: A wide-bandgap semiconductor for thermoelectric applications–A perspective. FRONTIERS IN NANOTECHNOLOGY 2022. [DOI: 10.3389/fnano.2022.1095291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Layered GeI2 is a two-dimensional wide-bandgap van der Waals semiconductor, which is theorized to be a promising material for thermoelectric applications. While the value of the experimentally extrapolated indirect optical bandgap of GeI2 is found to be consistent with the existing theoretical calculations, its potential as a thermoelectric material still lacks experimental validation. In this Perspective, recent experimental efforts aimed towards investigating its dynamical properties and tuning its bandgap further, via intercalation, are discussed. A thorough understanding of its dynamical properties elucidates the extent of electron-phonon scattering in this system, knowledge of which is crucial in order to open pathways for future studies aiming to realize GeI2-based thermoelectric devices.
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Da Silva ACH, Caturello NAMS, Besse R, Lima MP, Da Silva JLF. Edge, size, and shape effects on WS2, WSe2, and WTe2 nanoflake stability: design principles from an ab initio investigation. Phys Chem Chem Phys 2019; 21:23076-23084. [DOI: 10.1039/c9cp03698a] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The magic nanoflakes, obtained by the evaluation of the relative stability function, are n = 9 and 14 for all chemical compositions, whereas n = 12 is a magic number for WS2 and WSe2.
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Affiliation(s)
| | | | - Rafael Besse
- São Carlos Institute of Physics
- University of São Paulo
- São Carlos
- Brazil
| | - Matheus P. Lima
- Department of Physics
- Federal University of São Carlos
- São Carlos
- Brazil
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8
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Kim HJ, Song YW, Namgung SD, Song MK, Yang S, Kwon JY. Optical properties of the crumpled pattern of selectively layered MoS 2. OPTICS LETTERS 2018; 43:4590-4593. [PMID: 30272690 DOI: 10.1364/ol.43.004590] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Accepted: 08/24/2018] [Indexed: 06/08/2023]
Abstract
Crumple-structured two-dimensional MoS2 was evaluated as an essential element for future optoelectronic and stretchable devices owing to its interesting optical properties. This Letter reports the characteristics of the crumpled structure of MoS2 directly layered on a MoS2 sheet by chemical vapor deposition. The crumpling structure is presented as a method for selectively layering MoS2 with crumpled layered patterning and tunable optical properties as a crumpled structure on a single substrate. Optical analysis by the fast Fourier transform revealed the distribution characteristics of the crumple structure, and a Raman, photoluminescence, and optical absorption analysis confirmed the change in peak shift and intensity according to the degree of the crumpled structure. This material has potential future optoelectronic applications.
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Mlinar V. Effects of a magnetic field on the optoelectronic properties of mono- and bi-layer transition metal dichalcogenides. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2018; 30:275502. [PMID: 29848805 DOI: 10.1088/1361-648x/aac908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We report a theoretical study on the effects of an external magnetic field on the electronic and optical properties of mono- and bi-layer MoS2, and bilayer MoS2/WS2 heterostructures. The direction of an applied magnetic field determines (i) the strength of the coupling between the atomic orbital moments of the structure and the field, and (ii) Zeeman contribution to the splitting of the VB and CB levels with the amplitude of the applied field. Whereas for a magnetic field applied perpendicular to the structure, calculated real part of optical conductivity reveals optical transitions red-shifted compared to zero magnetic field case, conductivity is unaffected by the the amplitude of an in-plane applied magnetic field. We show that through modifying atomic d-orbitals conduction and valence band states by an applied electric field, we can determine and control the impact of a magnetic field on the optical response of these materials. We employ our parametrized tight-binding model with non-orthogonal sp3d5 orbitals and spin-orbit coupling, which was advanced to include the effects of an external magnetic field through Peierls substitution in the wave vector and the Zeeman energy term.
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Affiliation(s)
- Vladan Mlinar
- Research Institute for Advanced Materials Design, Providence, RI 02906, United States of America
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Kong X, Wang X, Ma D, Huang J, Li J, Zhao T, Yin L, Feng Q. In situ topotactic synthesis of a porous network Zn2Ti3O8 platelike nanoarchitecture and its long-term cycle performance for a LIB anode. CrystEngComm 2018. [DOI: 10.1039/c8ce01303a] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Porous network Zn2Ti3O8 platelike nanoarchitecture was prepared by an ion exchange reaction and further in situ topotactic transformation, and it exhibited an enhanced reversibility capacity of 408 mA h g−1 after 1000 cycles at a current density of 1 Ag−1.
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Affiliation(s)
- Xingang Kong
- School of Materials Science and Engineering
- Shaanxi University of Science and Technology
- Xi'an
- PR China
| | - Xing Wang
- School of Materials Science and Engineering
- Shaanxi University of Science and Technology
- Xi'an
- PR China
| | - Dingying Ma
- School of Materials Science and Engineering
- Shaanxi University of Science and Technology
- Xi'an
- PR China
| | - Jianfeng Huang
- School of Materials Science and Engineering
- Shaanxi University of Science and Technology
- Xi'an
- PR China
| | - Jiayin Li
- School of Materials Science and Engineering
- Shaanxi University of Science and Technology
- Xi'an
- PR China
| | - Ting Zhao
- School of Materials Science and Engineering
- Shaanxi University of Science and Technology
- Xi'an
- PR China
| | - Lixiong Yin
- School of Materials Science and Engineering
- Shaanxi University of Science and Technology
- Xi'an
- PR China
| | - Qi Feng
- School of Materials Science and Engineering
- Shaanxi University of Science and Technology
- Xi'an
- PR China
- Department of Advanced Materials Science
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Li J, Duan Y, Li Y, Li T, Yin LW, Li H. First principles study of electronic transport properties in novel FeB2 flake-based nanodevices. Phys Chem Chem Phys 2018; 20:4455-4465. [DOI: 10.1039/c7cp07132a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
First-principles calculations provide theoretical support for the promising applications of innovative two-probe devices based on FeB2 flakes and reveal the superiority of devices with FeB2 flakes at temperatures not above 1000 K in transport properties.
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Affiliation(s)
- Jie Li
- Key Laboratory for Liquid–Solid Structural Evolution and Processing of Materials
- Ministry of Education
- Shandong University
- Jinan 250061
- People's Republic of China
| | - Yunrui Duan
- Key Laboratory for Liquid–Solid Structural Evolution and Processing of Materials
- Ministry of Education
- Shandong University
- Jinan 250061
- People's Republic of China
| | - Yifan Li
- Key Laboratory for Liquid–Solid Structural Evolution and Processing of Materials
- Ministry of Education
- Shandong University
- Jinan 250061
- People's Republic of China
| | - Tao Li
- Key Laboratory for Liquid–Solid Structural Evolution and Processing of Materials
- Ministry of Education
- Shandong University
- Jinan 250061
- People's Republic of China
| | - Long-Wei Yin
- Key Laboratory for Liquid–Solid Structural Evolution and Processing of Materials
- Ministry of Education
- Shandong University
- Jinan 250061
- People's Republic of China
| | - Hui Li
- Key Laboratory for Liquid–Solid Structural Evolution and Processing of Materials
- Ministry of Education
- Shandong University
- Jinan 250061
- People's Republic of China
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