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Chung YK, Lee J, Lee WG, Sung D, Chae S, Oh S, Choi KH, Kim BJ, Choi JY, Huh J. Theoretical Study of Anisotropic Carrier Mobility for Two-Dimensional Nb 2Se 9 Material. ACS OMEGA 2021; 6:26782-26790. [PMID: 34661032 PMCID: PMC8515826 DOI: 10.1021/acsomega.1c03728] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Accepted: 09/20/2021] [Indexed: 06/13/2023]
Abstract
Finding new materials with satisfying all the desired criteria for nanodevices is an extremely difficult work. Here, we introduce a novel Nb2Se9 material as a promising candidate, capable of overcoming some physical limitations, such as a suitable band gap, high carrier mobility, and chemical stability. Unlike graphene, it has a noticeable band gap and no dangling bonds at surfaces that deteriorate transport properties, owing to its molecular chain structure. Using density functional theory (DFT) calculations with deformation potential (DP) theory, we find that the electron mobility of 2D Nb2Se9 across the axis direction reaches up to 2.56 × 103 cm2 V-1 s-1 and is approximately 2.5-6 times higher than the mobility of other 2D materials, such as MoS2, black phosphorous, and InSe, at room temperature. Moreover, the mobility of 2D Nb2Se9 is highly anisotropic (μ a /μ c ≈ 6.5). We demonstrate the potential of 2D Nb2Se9 for applications in nanoscale electronic devices and, possibly, mid-infrared photodetectors.
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Affiliation(s)
- You Kyoung Chung
- Department
of Chemistry, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Junho Lee
- Department
of Chemistry, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Weon-Gyu Lee
- Department
of Chemistry, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Dongchul Sung
- Department
of Chemistry, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Sudong Chae
- School
of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Seungbae Oh
- School
of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Kyung Hwan Choi
- School
of Advanced Institute of Nanotechnology, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Bum Jun Kim
- School
of Advanced Institute of Nanotechnology, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Jae-Young Choi
- School
of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
- School
of Advanced Institute of Nanotechnology, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Joonsuk Huh
- Department
of Chemistry, Sungkyunkwan University, Suwon 16419, Republic of Korea
- School
of Advanced Institute of Nanotechnology, Sungkyunkwan University, Suwon 16419, Republic of Korea
- Institute
of Quantum Biophysics, Sungkyunkwan University, Suwon 16419, Republic of Korea
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Mao S, Chang J, Zhou G, Chen J. Nanomaterial-enabled Rapid Detection of Water Contaminants. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2015; 11:5336-59. [PMID: 26315216 DOI: 10.1002/smll.201500831] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2015] [Revised: 05/24/2015] [Indexed: 05/18/2023]
Abstract
Water contaminants, e.g., inorganic chemicals and microorganisms, are critical metrics for water quality monitoring and have significant impacts on human health and plants/organisms living in water. The scope and focus of this review is nanomaterial-based optical, electronic, and electrochemical sensors for rapid detection of water contaminants, e.g., heavy metals, anions, and bacteria. These contaminants are commonly found in different water systems. The importance of water quality monitoring and control demands significant advancement in the detection of contaminants in water because current sensing technologies for water contaminants have limitations. The advantages of nanomaterial-based sensing technologies are highlighted and recent progress on nanomaterial-based sensors for rapid water contaminant detection is discussed. An outlook for future research into this rapidly growing field is also provided.
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Affiliation(s)
- Shun Mao
- Department of Mechanical Engineering, University of Wisconsin-Milwaukee, 3200 North Cramer Street, Milwaukee, Wisconsin, 53211, USA
| | - Jingbo Chang
- Department of Mechanical Engineering, University of Wisconsin-Milwaukee, 3200 North Cramer Street, Milwaukee, Wisconsin, 53211, USA
| | - Guihua Zhou
- Department of Mechanical Engineering, University of Wisconsin-Milwaukee, 3200 North Cramer Street, Milwaukee, Wisconsin, 53211, USA
| | - Junhong Chen
- Department of Mechanical Engineering, University of Wisconsin-Milwaukee, 3200 North Cramer Street, Milwaukee, Wisconsin, 53211, USA
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Akdim B, Pachter R, Vaia RA. Tunability in electron transport of molybdenum chalcogenide nanowires by theoretical prediction. Chem Phys Lett 2014. [DOI: 10.1016/j.cplett.2014.10.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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MacKenzie R, Fraschina C, Dielacher B, Sannomiya T, Dahlin AB, Vörös J. Simultaneous electrical and plasmonic monitoring of potential induced ion adsorption on metal nanowire arrays. NANOSCALE 2013; 5:4966-4975. [PMID: 23632884 DOI: 10.1039/c3nr34172k] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Simultaneous LSPR and electronic sensing of potential induced ion adsorption onto gold nanowire arrays is presented. The formation of a Stern layer upon applying an electrochemical potential generated a complex optical response. Simulation of a lossy atomic layer on the nanowire array using the Multiple Multipole Program (MMP) corresponded very well to the experimentally observed peak position, intensity, and radius of curvature changes. Additionally, a significant voltage-dependent change in the resistance of the gold nanowire array was observed during the controlled formation of the electrical double layer. The results demonstrated that an applied electrochemical potential induces measurable changes in the optical and electrical properties of the gold nanowire surface. This is the first demonstration of combined plasmonic and nanowire resistance-based sensing of a surface process in the literature.
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Affiliation(s)
- Robert MacKenzie
- ETH Zurich, Institute for Biomedical Engineering, Zurich, Switzerland
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Sheridan JG, Heidelberg A, Brougham DF, Nellist PD, Langford RM, Boland JJ. Self-assembly of LiMo3Se3 nanowire networks from nanoscale building-blocks in solution. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:15344-15349. [PMID: 23009286 DOI: 10.1021/la301918x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
LiMo(3)Se(3) is a highly anisotropic solid comprised of a regular pattern of quasi-1-D wire-like structures. Solutions of LiMo(3)Se(3) deposited on substrates and TEM grids reveal the presence of two-dimensional network morphologies. High resolution STEM imaging reveals that the junctions within these networks are not formed by discrete overlying LiMo(3)Se(3) fibers or wires. Rather the junctions are continuous in that the wires are seamlessly interwoven from one bundle to the next. We investigated network formation by dynamic light scattering and AFM and demonstrate that the networks are not pre-existent in solution but rather form via self-assembly of nanoscale building blocks that is driven by solvent evaporation.
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Affiliation(s)
- John G Sheridan
- School of Chemistry and the Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Trinity College Dublin, Ireland
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Amorim CA, Berengue OM, Kamimura H, Leite ER, Chiquito AJ. Measuring the mobility of single crystalline wires and its dependence on temperature and carrier density. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2011; 23:205803. [PMID: 21540507 DOI: 10.1088/0953-8984/23/20/205803] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Kinetic transport parameters are fundamental for the development of electronic nanodevices. We present new results for the temperature dependence of mobility and carrier density in single crystalline In(2)O(3) samples and the method of extraction of these parameters which can be extended to similar systems. The data were obtained using a conventional Hall geometry and were quantitatively described by the semiconductor transport theory characterizing the electron transport as being controlled by the variable range hopping mechanism. A comprehensive analysis is provided showing the contribution of ionized impurities (low temperatures) and acoustic phonon (high temperatures) scattering mechanisms to the electron mobility. The approach presented here avoids common errors in kinetic parameter extraction from field effect data, serving as a versatile platform for direct investigation of any nanoscale electronic materials.
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Affiliation(s)
- Cleber A Amorim
- NanO LaB-Departamento de Física, Universidade Federal de São Carlos, São Carlos, São Paulo, Brazil.
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Shi P, Zhang J, Lin HY, Bohn PW. Effect of molecular adsorption on the electrical conductance of single au nanowires fabricated by electron-beam lithography and focused ion beam etching. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2010; 6:2598-603. [PMID: 20957763 DOI: 10.1002/smll.201001295] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Metal nanowires are one of the potential candidates for nanostructured sensing elements used in future portable devices for chemical detection; however, the optimal methods for fabrication have yet to be fully explored. Two routes to nanowire fabrication, electron-beam lithography (EBL) and focused ion beam (FIB) etching, are studied, and their electrical and chemical sensing properties are compared. Although nanowires fabricated by both techniques exhibit ohmic conductance, I-V characterization indicates that nanowires fabricated by FIB etching exhibit abnormally high resistivity. In addition, the resistivity of nanowires fabricated by FIB etching shows very low sensitivity toward molecular adsorption, while those fabricated by EBL exhibit sensitive resistance change upon exposure to solution-phase adsorbates. The mean grain sizes of nanowires prepared by FIB etching are much smaller than those fabricated by EBL, so their resistance is dominated by grain-boundary scattering. As a result, these nanowires are much less sensitive to molecular adsorption, which mediates nanowire conduction through surface scattering. The much reduced mean grain sizes of these nanowires correlate with Ga ion damage caused during the ion milling process. Thus, even though the nanowires prepared by FIB etching can be smaller than their EBL counterparts, their reduced sensitivity to adsorption suggests that nanowires produced by EBL are preferred for chemical and biochemical sensing applications.
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Affiliation(s)
- Ping Shi
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556, USA
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