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Xiang H, Xu B, Zhao W, Xia Y, Yin J, Zhang X, Liu Z. The magnetism of 1T-MX2 (M = Zr, Hf; X = S, Se) monolayers by hole doping. RSC Adv 2019; 9:13561-13566. [PMID: 35519557 PMCID: PMC9063905 DOI: 10.1039/c9ra01218d] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2019] [Accepted: 04/16/2019] [Indexed: 11/22/2022] Open
Abstract
The magnetism of hole doped 1T-MX2 (M = Zr, Hf; X = S, Se) monolayers is systematically studied by using first principles density functional calculations. The pristine 1T-MX2 monolayers are semiconductors with nonmagnetic ground states, which can be transformed to ferromagnetic states by the approach of hole doping. For the unstrained monolayers, the spontaneous magnetization appears once above the critical hole density (1014 cm−2), where the p orbital of S or Se atoms contributes the most of the magnetic moment. As the tensile strains exceed 4%, the magnetic moments per hole of ZrS2 and HfS2 monolayers increase sharply to a saturated value with increasing hole density, implying obvious advantages over the unstrained monolayers. The phonon dispersion calculations for the strained ZrS2 and HfS2 monolayers indicate that they can keep the dynamical stability by hole doping. Furthermore, we propose that the fluorine atom modified ZrS2 monolayer could obtain stable ferromagnetism. The magnetism in hole doped 1T-MX2 (M = Zr, Hf; X = S, Se) monolayers has great potential for developing spintronic devices with desirable applications. The magnetism of zirconium and hafnium dichalcogenides by hole doping is studied by using first principles calculations.![]()
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Affiliation(s)
- Hui Xiang
- School of Mathematics and Physics
- Hubei Polytechnic University
- Huangshi
- China
- National Laboratory of Solid State Microstructures
| | - Bo Xu
- School of Sciences
- Key Laboratory of Biomedical Functional Materials
- China Pharmaceutical University
- Nanjing
- China
| | - Weiqian Zhao
- School of Mathematics and Physics
- Hubei Polytechnic University
- Huangshi
- China
| | - Yidong Xia
- National Laboratory of Solid State Microstructures
- Department of Materials Science and Engineering
- Nanjing University
- Nanjing
- China
| | - Jiang Yin
- National Laboratory of Solid State Microstructures
- Department of Materials Science and Engineering
- Nanjing University
- Nanjing
- China
| | - Xiaofei Zhang
- School of Mathematics and Physics
- Hubei Polytechnic University
- Huangshi
- China
| | - Zhiguo Liu
- National Laboratory of Solid State Microstructures
- Department of Materials Science and Engineering
- Nanjing University
- Nanjing
- China
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252
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Zhou Z, Long M, Pan L, Wang X, Zhong M, Blei M, Wang J, Fang J, Tongay S, Hu W, Li J, Wei Z. Perpendicular Optical Reversal of the Linear Dichroism and Polarized Photodetection in 2D GeAs. ACS NANO 2018; 12:12416-12423. [PMID: 30408410 DOI: 10.1021/acsnano.8b06629] [Citation(s) in RCA: 74] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
The ability to detect linearly polarized light is central to practical applications in polarized optical and optoelectronic fields and has been successfully demonstrated with polarized photodetection of in-plane anisotropic two-dimensional (2D) materials. Here, we report the anisotropic optical characterization of a group IV-V compound-2D germanium arsenic (GeAs) with anisotropic monoclinic structures. High-quality 2D GeAs crystals show the representative angle-resolved Raman property. The in-plane anisotropic optical nature of the GeAs crystal is further investigated by polarization-resolved absorption spectra (400-2000 nm) and polarization-sensitive photodetectors. From the visible to the near-infrared range, 2D GeAs nanoflakes demonstrate the distinct perpendicular optical reversal with a 75-80° angle on both the linear dichroism and polarization-sensitive photodetection. Obvious anisotropic features and the high dichroic ratio of Ipmax /Ipmin ∼ 1.49 at 520 nm and Ipmax /Ipmin ∼ 4.4 at 830 nm are achieved by the polarization-sensitive photodetection. The polarization-dependent photocurrent mapping implied that the polarized photocurrent mainly occurred at the Schottky photodiodes between electrode/GeAs interface. These experimental results are consistent with the theoretical calculation of band structure and band realignment. Besides the excellent polarization-sensitive photoresponse properties, GeAs-based photodetectors also exhibit rapid on/off response. These results demonstrate that the 2D GeAs crystals have promising potential for polarization optical applications.
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Affiliation(s)
- Ziqi Zhou
- State Key Laboratory of Superlattices and Microstructures , Institute of Semiconductors, Chinese Academy of Sciences & Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences , Beijing 100083 , China
| | - Mingsheng Long
- State Key Laboratory of Infrared Physics , Shanghai Institute of Technical Physics, Chinese Academy of Sciences , Shanghai 200083 , China
| | - Longfei Pan
- State Key Laboratory of Superlattices and Microstructures , Institute of Semiconductors, Chinese Academy of Sciences & Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences , Beijing 100083 , China
| | - Xiaoting Wang
- State Key Laboratory of Information Photonics and Optical Communications, School of Science , Beijing University of Posts and Telecommunications , Beijing 100876 , China
| | - Mianzeng Zhong
- State Key Laboratory of Superlattices and Microstructures , Institute of Semiconductors, Chinese Academy of Sciences & Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences , Beijing 100083 , China
| | - Mark Blei
- School for Engineering of Matter, Transport and Energy , Arizona State University , Tempe , Arizona 85287 , United States
| | - Jianlu Wang
- State Key Laboratory of Infrared Physics , Shanghai Institute of Technical Physics, Chinese Academy of Sciences , Shanghai 200083 , China
| | - Jingzhi Fang
- State Key Laboratory of Superlattices and Microstructures , Institute of Semiconductors, Chinese Academy of Sciences & Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences , Beijing 100083 , China
| | - Sefaattin Tongay
- School for Engineering of Matter, Transport and Energy , Arizona State University , Tempe , Arizona 85287 , United States
| | - Weida Hu
- State Key Laboratory of Infrared Physics , Shanghai Institute of Technical Physics, Chinese Academy of Sciences , Shanghai 200083 , China
| | - Jingbo Li
- State Key Laboratory of Superlattices and Microstructures , Institute of Semiconductors, Chinese Academy of Sciences & Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences , Beijing 100083 , China
| | - Zhongming Wei
- State Key Laboratory of Superlattices and Microstructures , Institute of Semiconductors, Chinese Academy of Sciences & Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences , Beijing 100083 , China
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253
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He Z, Zhao R, Chen X, Chen H, Zhu Y, Su H, Huang S, Xue J, Dai J, Cheng S, Liu M, Wang X, Chen Y. Defect Engineering in Single-Layer MoS 2 Using Heavy Ion Irradiation. ACS APPLIED MATERIALS & INTERFACES 2018; 10:42524-42533. [PMID: 30427173 DOI: 10.1021/acsami.8b17145] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Transition metal dichalcogenides (TMDs) have attracted much attention due to their promising optical, electronic, magnetic, and catalytic properties. Engineering the defects in TMDs represents an effective way to achieve novel functionalities and superior performance of TMDs devices. However, it remains a significant challenge to create defects in TMDs in a controllable manner or to correlate the nature of defects with their functionalities. In this work, taking single-layer MoS2 as a model system, defects with controlled densities are generated by 500 keV Au irradiation with different ion fluences, and the generated defects are mostly S vacancies. We further show that the defects introduced by ion irradiation can significantly affect the properties of the single-layer MoS2, leading to considerable changes in its photoluminescence characteristics and electrocatalytic behavior. As the defect density increases, the characteristic photoluminescence peak of MoS2 first blueshifts and then redshifts, which is likely due to the electron transfer from MoS2 to the adsorbed O2 at the defect sites. The generation of the defects can also strongly improve the hydrogen evolution reaction activity of MoS2, attributed to the modified adsorption of atomic hydrogen at the defects.
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Affiliation(s)
- Zuyun He
- Guangzhou Key Laboratory for Surface Chemistry of Energy Materials, New Energy Research Institute, School of Environment and Energy , South China University of Technology , Guangzhou 510006 , China
| | - Ran Zhao
- School of Advanced Materials, Shenzhen Graduate School , Peking University , Shenzhen 518055 , China
| | - Xiaofei Chen
- China Institute of Nuclear Information & Economics , Beijing 100871 , China
| | - Huijun Chen
- Guangzhou Key Laboratory for Surface Chemistry of Energy Materials, New Energy Research Institute, School of Environment and Energy , South China University of Technology , Guangzhou 510006 , China
| | - Yunmin Zhu
- Guangzhou Key Laboratory for Surface Chemistry of Energy Materials, New Energy Research Institute, School of Environment and Energy , South China University of Technology , Guangzhou 510006 , China
| | | | - Shengxi Huang
- Department of Electrical Engineering , The Pennsylvania State University , University Park , Pennsylvania 16802 , United States
| | - Jianming Xue
- State Key Laboratory of Nuclear Physics and Technology, School of Physics , Peking University , Beijing 100871 , China
| | | | - Shuang Cheng
- Guangzhou Key Laboratory for Surface Chemistry of Energy Materials, New Energy Research Institute, School of Environment and Energy , South China University of Technology , Guangzhou 510006 , China
| | - Meilin Liu
- Materials Science and Engineering , Georgia Institute of Technology , Atlanta , Georgia 30332-0245 , United States
| | - Xinwei Wang
- School of Advanced Materials, Shenzhen Graduate School , Peking University , Shenzhen 518055 , China
| | - Yan Chen
- Guangzhou Key Laboratory for Surface Chemistry of Energy Materials, New Energy Research Institute, School of Environment and Energy , South China University of Technology , Guangzhou 510006 , China
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254
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Liu T, Xiang D, Zheng Y, Wang Y, Wang X, Wang L, He J, Liu L, Chen W. Nonvolatile and Programmable Photodoping in MoTe 2 for Photoresist-Free Complementary Electronic Devices. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1804470. [PMID: 30393893 DOI: 10.1002/adma.201804470] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Revised: 10/07/2018] [Indexed: 06/08/2023]
Abstract
2D transition-metal dichalcogenide (TMD)-based electronic devices have been extensively explored toward the post-Moore era. Huge efforts have been devoted to modulating the doping profile of TMDs to achieve 2D p-n junctions and inverters, the fundamental units in logic circuits. Here, photoinduced nonvolatile and programmable electron doping in MoTe2 based on a heterostructure of MoTe2 and hexagonal boron nitride (BN) is reported. The electron transport property in the MoTe2 device can be precisely controlled by modulating the magnitude of the photodoping gate exerted on BN. Through tuning the polarity of the photodoping gate exerted on BN under illumination, such a doping effect in MoTe2 can be programmed with excellent repeatability and is retained for over 14 d in the absence of an external perturbation. By spatially controlling the photodoping region in MoTe2 , a photoresist-free p-n junction and inverter in the MoTe2 homostructure are achieved. The MoTe2 diode exhibits a near-unity ideality factor of ≈1.13 with a rectification ratio of ≈1.7 × 104 . Moreover, the gain of the MoTe2 inverter reaches ≈98, which is among the highest values for 2D-material-based homoinverters. These findings promise photodoping as an effective method to achieve 2D-TMDs-based nonvolatile and programmable complementary electronic devices.
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Affiliation(s)
- Tao Liu
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
| | - Du Xiang
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
| | - Yue Zheng
- Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore, 117542, Singapore
| | - Yanan Wang
- Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore, 117542, Singapore
| | - Xinyun Wang
- Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore, 117542, Singapore
| | - Li Wang
- Institute for Advanced Study and Department of Physics, Nanchang University, 999, Xue Fu Da Dao, Nanchang, 33003, P. R. China
| | - Jun He
- School of Physics and Electronics, Central South University, 932 South Lushan Road, Changsha, 410083, P. R. China
| | - Lei Liu
- State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Chinese Academy of Sciences, No. 3888 Dongnanhu Road, Changchun, 130033, P. R. China
| | - Wei Chen
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
- Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore, 117542, Singapore
- Centre for Advanced 2D Materials and Graphene Research Centre, National University of Singapore, 6 Science Drive 2, Singapore, 117546, Singapore
- National University of Singapore (Suzhou) Research Institute, 377 Lin Quan Street, Suzhou Industrial Park, Jiang Su, 215123, P. R. China
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255
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Hu Z, Niu T, Guo R, Zhang J, Lai M, He J, Wang L, Chen W. Two-dimensional black phosphorus: its fabrication, functionalization and applications. NANOSCALE 2018; 10:21575-21603. [PMID: 30457619 DOI: 10.1039/c8nr07395c] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Phosphorus, one of the most abundant elements in the Earth (∼0.1%), has attracted much attention in the last five years since the rediscovery of two-dimensional (2D) black phosphorus (BP) in 2014. The successful scaling down of BP endows this 'old material' with new vitality, resulting from the intriguing semiconducting properties in the atomic scale limit, i.e. layer-dependent bandgap that covers from the visible light to mid-infrared light spectrum as well as hole-dominated ambipolar transport characteristics. Intensive research effort has been devoted to the fabrication, characterization, functionalization and application of BP and other phosphorus allotropes. In this review article, we summarize the fundamental properties and fabrication techniques of BP, with particular emphasis on the recent progress in molecular beam epitaxy growth of 2D phosphorus. Subsequently, we highlight recent progress in BP (opto)electronic device applications achieved via customized manipulation methods, such as interface, defect and bandgap engineering as well as forming Lego-like stacked heterostructures.
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Affiliation(s)
- Zehua Hu
- School of Physics and Optoelectronic Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China and Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117542, Singapore.
| | - Tianchao Niu
- Herbert Gleiter Institute of Nanoscience, College of Materials Science and Engineering, Nanjing University of Science and Technology, No. 200 Xiaolingwei, Nanjing 210094, China.
| | - Rui Guo
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore
| | - Jialin Zhang
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore
| | - Min Lai
- School of Physics and Optoelectronic Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China
| | - Jun He
- School of Physics and Electronics, Central South University, 932 Lushan Road, Changsha 100083, China
| | - Li Wang
- Institute for Advanced Study and Department of Physics, Nanchang University, 999 Xue Fu Da Dao, Nanchang 330000, China
| | - Wei Chen
- Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117542, Singapore. and Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore and National University of Singapore (Suzhou) Research Institute, 377 Lin Quan Street, Suzhou Industrial Park, Suzhou 215123, China
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256
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Le PTT, Hieu NN, Bui LM, Phuc HV, Hoi BD, Amin B, Nguyen CV. Structural and electronic properties of a van der Waals heterostructure based on silicene and gallium selenide: effect of strain and electric field. Phys Chem Chem Phys 2018; 20:27856-27864. [PMID: 30398248 DOI: 10.1039/c8cp05588b] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Combining van der Waals heterostructures by stacking different two-dimensional materials on top of each other layer-by-layer can enhance their desired properties and greatly extend the applications of the parent materials. In this work, by means of first principles calculations, we investigate systematically the structural and electronic properties of six different stacking configurations of a Si/GaSe heterostructure. The effect of biaxial strain and electric field on the electronic properties of the most energetically stable configuration of the Si/GaSe heterostructure has also been discussed. At the equilibrium state, the electronic properties of the Si/GaSe heterostructure in all its stacking configurations are well kept as compared with that of single layers owing to their weak van der Waals interactions. Interestingly, we find that a sizable band gap is opened at the Dirac K point of silicene in the Si/GaSe heterostructure, which could be further controlled by biaxial strain or electric field. These findings open up a possibility for designing silicene-based electronic devices, which exhibit a controllable band gap. Furthermore, the Si/GaSe heterostructure forms an n-type Schottky contact with a small Schottky barrier height of 0.23 eV. A transformation from the n-type Schottky contact to a p-type one, or from the Schottky contact to an ohmic contact may occur in the Si/GaSe heterostructure when strain or an electric field is applied.
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Affiliation(s)
- P T T Le
- Theoretical Physics Research Group, Advanced Institute of Materials Science, Ton Duc Thang University, Ho Chi Minh City, Viet Nam.
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257
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Wang X, Song J, Qu J. Antimonen: von der experimentellen Herstellung zur praktischen Anwendung. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201808302] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Xin Wang
- College of Optoelectronic EngineeringKey Lab of Optoelectronic Devices and Systems of Ministry of Education/Guangdong ProvinceShenzhen University Shenzhen 518060 China
| | - Jun Song
- College of Optoelectronic EngineeringKey Lab of Optoelectronic Devices and Systems of Ministry of Education/Guangdong ProvinceShenzhen University Shenzhen 518060 China
| | - Junle Qu
- College of Optoelectronic EngineeringKey Lab of Optoelectronic Devices and Systems of Ministry of Education/Guangdong ProvinceShenzhen University Shenzhen 518060 China
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258
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Wang X, Song J, Qu J. Antimonene: From Experimental Preparation to Practical Application. Angew Chem Int Ed Engl 2018; 58:1574-1584. [PMID: 30137673 DOI: 10.1002/anie.201808302] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Indexed: 01/01/2023]
Abstract
The two-dimensional material antimonene was first reported in 2015. Subsequently, its unique properties, including enhanced stability, high carrier mobility, and band-gap tunability, were predicted theoretically. These theoretical results have motivated experimental confirmation and thus a better understanding of this new material. Recently, the preparation of antimonene and its attempted use in several applications have attracted extensive attention. This Minireview focuses on both the experimental preparation and practical applications of antimonene, including the results of recent research on novel methods of preparing antimonene and its potential applications in optoelectronic devices, electrocatalysis, energy storage, and cancer therapy. Moreover, it provides insight that could further improve the preparation of antimonene and also describes numerous opportunities for application.
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Affiliation(s)
- Xin Wang
- College of Optoelectronic Engineering, Key Lab of Optoelectronic Devices and Systems of Ministry of Education/Guangdong Province, Shenzhen University, Shenzhen, 518060, China
| | - Jun Song
- College of Optoelectronic Engineering, Key Lab of Optoelectronic Devices and Systems of Ministry of Education/Guangdong Province, Shenzhen University, Shenzhen, 518060, China
| | - Junle Qu
- College of Optoelectronic Engineering, Key Lab of Optoelectronic Devices and Systems of Ministry of Education/Guangdong Province, Shenzhen University, Shenzhen, 518060, China
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259
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Xu H, Zhang H, Guo Z, Shan Y, Wu S, Wang J, Hu W, Liu H, Sun Z, Luo C, Wu X, Xu Z, Zhang DW, Bao W, Zhou P. High-Performance Wafer-Scale MoS 2 Transistors toward Practical Application. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2018; 14:e1803465. [PMID: 30328296 DOI: 10.1002/smll.201803465] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Revised: 09/24/2018] [Indexed: 05/13/2023]
Abstract
Atomic thin transition-metal dichalcogenides (TMDs) are considered as an emerging platform to build next-generation semiconductor devices. However, to date most devices are still based on exfoliated TMD sheets on a micrometer scale. Here, a novel chemical vapor deposition synthesis strategy by introducing multilayer (ML) MoS2 islands to improve device performance is proposed. A four-probe method is applied to confirm that the contact resistance decreases by one order of magnitude, which can be attributed to a conformal contact by the extra amount of exposed edges from the ML-MoS2 islands. Based on such continuous MoS2 films synthesized on a 2 in. insulating substrate, a top-gated field effect transistor (FET) array is fabricated to explore key metrics such as threshold voltage (V T ) and field effect mobility (μFE ) for hundreds of MoS2 FETs. The statistical results exhibit a surprisingly low variability of these parameters. An average effective μFE of 70 cm2 V-1 s-1 and subthreshold swing of about 150 mV dec-1 are extracted from these MoS2 FETs, which are comparable to the best top-gated MoS2 FETs achieved by mechanical exfoliation. The result is a key step toward scaling 2D-TMDs into functional systems and paves the way for the future development of 2D-TMDs integrated circuits.
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Affiliation(s)
- Hu Xu
- State Key Laboratory of ASIC and System, School of Microelectronics, Fudan University, Shanghai, 200433, China
| | - Haima Zhang
- State Key Laboratory of ASIC and System, School of Microelectronics, Fudan University, Shanghai, 200433, China
| | - Zhongxun Guo
- State Key Laboratory of ASIC and System, School of Microelectronics, Fudan University, Shanghai, 200433, China
| | - Yuwei Shan
- State Key Laboratory of Surface Physics, Key Laboratory of Micro and Nano Photonic Structures (MOE), Physics Department, Fudan University, Shanghai, 200433, China
| | - Shiwei Wu
- State Key Laboratory of Surface Physics, Key Laboratory of Micro and Nano Photonic Structures (MOE), Physics Department, Fudan University, Shanghai, 200433, China
| | - Jianlu Wang
- State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Science, 500 Yutian Road, Shanghai, 200083, China
| | - Weida Hu
- State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Science, 500 Yutian Road, Shanghai, 200083, China
| | - Hanqi Liu
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, Shanghai, 200433, China
| | - Zhengzong Sun
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, Shanghai, 200433, China
| | - Chen Luo
- Shanghai Key Laboratory of Multidimensional Information Processing, Department of Electronic Engineering, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, China
| | - Xing Wu
- Shanghai Key Laboratory of Multidimensional Information Processing, Department of Electronic Engineering, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, China
| | - Zihan Xu
- Shenzhen 6 Carbon Technology, Shenzhen, 518106, China
| | - David Wei Zhang
- State Key Laboratory of ASIC and System, School of Microelectronics, Fudan University, Shanghai, 200433, China
| | - Wenzhong Bao
- State Key Laboratory of ASIC and System, School of Microelectronics, Fudan University, Shanghai, 200433, China
| | - Peng Zhou
- State Key Laboratory of ASIC and System, School of Microelectronics, Fudan University, Shanghai, 200433, China
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260
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Wang D, Zhang X, Guo G, Gao S, Li X, Meng J, Yin Z, Liu H, Gao M, Cheng L, You J, Wang R. Large-Area Synthesis of Layered HfS 2(1- x )Se 2 x Alloys with Fully Tunable Chemical Compositions and Bandgaps. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1803285. [PMID: 30589474 DOI: 10.1002/adma.201803285] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Revised: 07/19/2018] [Indexed: 06/09/2023]
Abstract
Alloying transition metal dichalcogenides (TMDs) with different compositions is demonstrated as an effective way to acquire 2D semiconductors with widely tunable bandgaps. Herein, for the first time, the large-area synthesis of layered HfS2(1- x )Se2 x alloys with fully tunable chemical compositions on sapphire by chemical vapor deposition is reported, greatly expanding and enriching the family of 2D TMDs semiconductors. The configuration and high quality of their crystal structure are confirmed by various characterization techniques, and the bandgap of these alloys can be continually modulated from 2.64 to 1.94 eV with composition variations. Furthermore, prototype HfS2(1- x )Se2 x photodetectors with different Se compositions are fabricated, and the HfSe2 photodetector manifests the best performance among all the tested HfS2(1- x )Se2 x devices. Remarkably, by introducing a hexagonal boron nitride layer, the performance of the HfSe2 photodetector is greatly improved, exhibiting a high on/off ratio exceeding 105, an ultrafast response time of about 190 µs, and a high detectivity of 1012 Jones. This simple and controllable approach opens up a new way to produce high-quality 2D HfS2(1- x )Se2 x layers, which are highly qualified candidates for the next-generation application in high-performance optoelectronics.
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Affiliation(s)
- Denggui Wang
- Key Lab of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, P. R. China
- College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Xingwang Zhang
- Key Lab of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, P. R. China
- College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Gencai Guo
- College of Materials Science and Engineering, Beijing University of Technology, Beijing, 100124, P. R. China
| | - Shihan Gao
- Key Lab of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, P. R. China
- College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Xingxing Li
- Key Lab of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, P. R. China
- College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Junhua Meng
- Key Lab of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, P. R. China
- College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Zhigang Yin
- Key Lab of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, P. R. China
- College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Heng Liu
- Key Lab of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, P. R. China
- College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Menglei Gao
- Key Lab of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, P. R. China
- College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Likun Cheng
- Key Lab of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, P. R. China
- College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Jingbi You
- Key Lab of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, P. R. China
- College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Ruzhi Wang
- College of Materials Science and Engineering, Beijing University of Technology, Beijing, 100124, P. R. China
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261
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Radhakrishnan S, Das D, Deng L, Sudeep PM, Colas G, de Los Reyes CA, Yazdi S, Chu CW, Martí AA, Tiwary CS, Filleter T, Singh AK, Ajayan PM. An Insight into the Phase Transformation of WS 2 upon Fluorination. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1803366. [PMID: 30239044 DOI: 10.1002/adma.201803366] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2018] [Revised: 08/20/2018] [Indexed: 06/08/2023]
Abstract
The transformation from semiconducting to metallic phase, accompanied by a structural transition in 2D transition metal dichalcogenides has attracted the attention of the researchers worldwide. The unconventional structural transformation of fluorinated WS2 (FWS2 ) into the 1T phase is described. The energy difference between the two phases debugs this transition, as fluorination enhances the stability of 1T FWS2 and makes it energetically favorable at higher F concentration. Investigation of the electronic and optical nature of FWS2 is supplemented by possible band structures and bandgap calculations. Magnetic centers in the 1T phase appear in FWS2 possibly due to the introduction of defect sites. A direct consequence of the phase transition and associated increase in interlayer spacing is a change in friction behavior. Friction force microscopy is used to determine this effect of functionalization accompanied phase transformation.
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Affiliation(s)
- Sruthi Radhakrishnan
- Department of Materials Science and NanoEngineering, Rice University, Houston, TX, 77005, USA
| | - Deya Das
- Materials Research Center, Indian Institute of Science, Bangalore, 560012, India
| | - Liangzi Deng
- Texas Center for Superconductivity and Department of Physics, University of Houston, Houston, TX, 77004, USA
| | - Parambath M Sudeep
- Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, ON, M5S3G8, Canada
| | - Guillaume Colas
- Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, ON, M5S3G8, Canada
| | | | - Sadegh Yazdi
- Renewable and Sustainable Energy Institute, University of Colorado, Boulder, CO, 80309, USA
| | - Ching Wu Chu
- Texas Center for Superconductivity and Department of Physics, University of Houston, Houston, TX, 77004, USA
- Lawrence Berkeley National Lab, Berkeley, CA, 94720, USA
| | - Angel A Martí
- Department of Chemistry, Rice University, Houston, TX, 77005, USA
| | - Chandra Sekhar Tiwary
- Department of Materials Science and NanoEngineering, Rice University, Houston, TX, 77005, USA
- Metallurgical and Materials Engineering, Indian Institute of Technology Kharagpur, West Bengal, 721302, India
| | - Tobin Filleter
- Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, ON, M5S3G8, Canada
| | - Abhishek K Singh
- Materials Research Center, Indian Institute of Science, Bangalore, 560012, India
| | - Pulickel M Ajayan
- Department of Materials Science and NanoEngineering, Rice University, Houston, TX, 77005, USA
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262
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Zhang JL, Han C, Hu Z, Wang L, Liu L, Wee ATS, Chen W. 2D Phosphorene: Epitaxial Growth and Interface Engineering for Electronic Devices. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1802207. [PMID: 30101443 DOI: 10.1002/adma.201802207] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Revised: 05/17/2018] [Indexed: 06/08/2023]
Abstract
Black phosphorus (BP), first synthesized in 1914 and rediscovered as a new member of the family of 2D materials in 2014, combines many extraordinary properties of graphene and transition-metal dichalcogenides, such as high charge-carrier mobility, and a tunable direct bandgap. In addition, it displays other distinguishing properties, e.g., ambipolar transport and highly anisotropic properties. The successful application of BP in electronic and optoelectronic devices has stimulated significant research interest in other allotropes and alloys of 2D phosphorene, a class of 2D materials consisting of elemental phosphorus. As an atomically thin sheet, the various interfaces presented in 2D phosphorene (substrate/phosphorene, electrode/phosphorene, dielectric/phosphorene, atmosphere/phosphorene) play dominant roles in its bottom-up synthesis, and determine several key characteristics for the devices, such as carrier injection, carrier transport, carrier concentration, and device stability. The rational design/engineering of interfaces provides an effective way to manipulate the growth of 2D phosphorene, and modulate its electronic and optoelectronic properties to realize high-performance multifunctional devices. Here, recent progress of the interface engineering of 2D phosphorene is highlighted, including the epitaxial growth of single-layer blue phosphorus on different substrates, surface functionalization of BP for high-performance complementary devices, and the investigation of the BP degradation mechanism in ambient air.
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Affiliation(s)
- Jia Lin Zhang
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore
| | - Cheng Han
- SZU-NUS Collaborative Innovation Center for Optoelectronic Science and Technology, Shenzhen University, Shenzhen, 518060, China
- Department of Physics, National University of Singapore, 2 Science Drive 3, 117542, Singapore
| | - Zehua Hu
- Department of Physics, National University of Singapore, 2 Science Drive 3, 117542, Singapore
| | - Li Wang
- Institute for Advanced Study and Department of Physics, Nanchang University, 999 Xue Fu Da Dao, Nanchang, 330031, China
| | - Lei Liu
- State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, No. 3888 Dongnanhu Road, Changchun, 130033, China
| | - Andrew T S Wee
- Department of Physics, National University of Singapore, 2 Science Drive 3, 117542, Singapore
| | - Wei Chen
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore
- SZU-NUS Collaborative Innovation Center for Optoelectronic Science and Technology, Shenzhen University, Shenzhen, 518060, China
- Department of Physics, National University of Singapore, 2 Science Drive 3, 117542, Singapore
- National University of Singapore (Suzhou) Research Institute, 377 Lin Quan Street, Suzhou Industrial Park, Jiang Su, 215123, China
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263
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Hu Z, Li Q, Lei B, Wu J, Zhou Q, Gu C, Wen X, Wang J, Liu Y, Li S, Zheng Y, Lu J, He J, Wang L, Xiong Q, Wang J, Chen W. Abnormal Near-Infrared Absorption in 2D Black Phosphorus Induced by Ag Nanoclusters Surface Functionalization. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1801931. [PMID: 30144177 DOI: 10.1002/adma.201801931] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Revised: 07/28/2018] [Indexed: 06/08/2023]
Abstract
Black phosphorus (BP), as a fast emerging 2D material, shows promising potential in near-infrared (NIR) photodetection owing to its relatively small direct thickness-dependent bandgaps. However, the poor NIR absorption due to the atomically thin nature strongly hinders the practical application. In this study, it is demonstrated that surface functionalization of Ag nanoclusters on 2D BP can induce an abnormal NIR absorption at ≈746 nm, leading to ≈35 (138) times enhancement in 808 (730) nm NIR photoresponse for BP-based field-effect transistors. First-principles calculations reveal that localized bands are introduced into the bandgap of BP, serving as the midgap states, which create new transitions to the conduction band of BP and eventually lead to the abnormal absorption. This work provides a simple yet effective method to dramatically increase the NIR absorption of BP, which is crucial for developing high-performance NIR optoelectronic devices.
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Affiliation(s)
- Zehua Hu
- Department of Physics, National University of Singapore, Singapore, 117542, Singapore
- Department of Chemistry, National University of Singapore, Singapore, 117543, Singapore
- Center for Advanced 2D Materials, National University of Singapore, Singapore, 117546, Singapore
| | - Qiang Li
- School of Physics, Southeast University, Nanjing, 211189, P. R. China
| | - Bo Lei
- Department of Physics, National University of Singapore, Singapore, 117542, Singapore
- Department of Chemistry, National University of Singapore, Singapore, 117543, Singapore
- Center for Advanced 2D Materials, National University of Singapore, Singapore, 117546, Singapore
| | - Jing Wu
- Center for Advanced 2D Materials, National University of Singapore, Singapore, 117546, Singapore
- Institute of Materials Research and Engineering, 2 Fusionopolis Way, Innovis, #08-03, Singapore, 138634, Singapore
| | - Qionghua Zhou
- School of Physics, Southeast University, Nanjing, 211189, P. R. China
| | - Chengding Gu
- Department of Chemistry, National University of Singapore, Singapore, 117543, Singapore
| | - Xinglin Wen
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
| | - Junyong Wang
- Department of Physics, National University of Singapore, Singapore, 117542, Singapore
- Center for Advanced 2D Materials, National University of Singapore, Singapore, 117546, Singapore
| | - Yanpeng Liu
- Department of Chemistry, National University of Singapore, Singapore, 117543, Singapore
| | - Shisheng Li
- International Center for Materials Nanoarchitectonics, National Institute for Materials Science, Tsukuba, 305-0044, Japan
| | - Yue Zheng
- Department of Physics, National University of Singapore, Singapore, 117542, Singapore
- Department of Chemistry, National University of Singapore, Singapore, 117543, Singapore
- Center for Advanced 2D Materials, National University of Singapore, Singapore, 117546, Singapore
| | - Junpeng Lu
- School of Physics, Southeast University, Nanjing, 211189, P. R. China
| | - Jun He
- School of Physics and Electronics, Central South University, Changsha, 410083, China
| | - Li Wang
- Institute for Advanced Study and Department of Physics, Nanchang University, Nanchang, 330031, P. R. China
| | - Qihua Xiong
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
| | - Jinlan Wang
- School of Physics, Southeast University, Nanjing, 211189, P. R. China
| | - Wei Chen
- Department of Physics, National University of Singapore, Singapore, 117542, Singapore
- Department of Chemistry, National University of Singapore, Singapore, 117543, Singapore
- Center for Advanced 2D Materials, National University of Singapore, Singapore, 117546, Singapore
- National University of Singapore (Suzhou) Research Institute, Su Zhou, 215123, P. R. China
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264
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Two-dimensional nanomaterial based sensors for heavy metal ions. Mikrochim Acta 2018; 185:478. [DOI: 10.1007/s00604-018-3005-1] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Accepted: 09/09/2018] [Indexed: 01/28/2023]
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265
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Song D, Li Q, Lu X, Li Y, Li Y, Wang Y, Gao F. Ultra-thin bimetallic alloy nanowires with porous architecture/monolayer MoS 2 nanosheet as a highly sensitive platform for the electrochemical assay of hazardous omethoate pollutant. JOURNAL OF HAZARDOUS MATERIALS 2018; 357:466-474. [PMID: 29935459 DOI: 10.1016/j.jhazmat.2018.06.021] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Revised: 06/07/2018] [Accepted: 06/09/2018] [Indexed: 06/08/2023]
Abstract
A novel electrochemical biosensor was designed for sensitive detection of organophosphate pesticides based on three-dimensional porous bimetallic alloy architecture with ultrathin nanowires (PdCo NWs, PdCu NWs, PdNi NWs) and monolayer MoS2 nanosheet (m-MoS2). The bimetallic alloy NWs/m-MoS2 nanomaterials were used as a sensing platform for electrochemical analysis of omethoate, a representative organophosphate pesticide, via acetylcholinesterase inhibition pathway. We demonstrated that all three bimetallic alloy NWs enhanced electrochemical responses of enzymatic biosensor, benefited from bimetallic synergistic action and porous structure. In particular, PdNi NWs outperformed other two bimetallic alloy. Moreover, PdNi NWs/m-MoS2 as an electronic transducer is superior to the corresponding biosensor in the absence of monolayer MoS2 nanosheet, which arise from synergistic signal amplification effect between different components. Under optimized conditions, the developed biosensor on the basis of PdNi NWs/m-MoS2 shows outstanding performance for the electrochemical assay of omethoate, such as a wide linear range (10-13 M∼10-7 M), a low detection limit of 0.05 pM at a signal-to-noise ratio of 3, high sensitivity and long-time stability. The results demonstrate that bimetallic alloy NWs/m-MoS2 nanocomposites could be excellent transducers to promote electron transfer for the electrochemical reactions, holding great potentials in the construction of current and future biosensing devices.
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Affiliation(s)
- Dandan Song
- Key Laboratory of Applied Chemistry, Department of Applied Chemistry, Yanshan University, Qinhuangdao 066004, PR China
| | - Qian Li
- Key Laboratory of Applied Chemistry, Department of Applied Chemistry, Yanshan University, Qinhuangdao 066004, PR China
| | - Xiong Lu
- Key Laboratory of Applied Chemistry, Department of Applied Chemistry, Yanshan University, Qinhuangdao 066004, PR China
| | - Yanshan Li
- Key Laboratory of Applied Chemistry, Department of Applied Chemistry, Yanshan University, Qinhuangdao 066004, PR China
| | - Yan Li
- Key Laboratory of Applied Chemistry, Department of Applied Chemistry, Yanshan University, Qinhuangdao 066004, PR China
| | - Yuanzhe Wang
- Key Laboratory of Applied Chemistry, Department of Applied Chemistry, Yanshan University, Qinhuangdao 066004, PR China
| | - Faming Gao
- Key Laboratory of Applied Chemistry, Department of Applied Chemistry, Yanshan University, Qinhuangdao 066004, PR China.
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266
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Jiang J, Ling C, Xu T, Wang W, Niu X, Zafar A, Yan Z, Wang X, You Y, Sun L, Lu J, Wang J, Ni Z. Defect Engineering for Modulating the Trap States in 2D Photoconductors. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1804332. [PMID: 30168633 DOI: 10.1002/adma.201804332] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Revised: 08/02/2018] [Indexed: 05/14/2023]
Abstract
Defect-induced trap states are essential in determining the performance of semiconductor photodetectors. The de-trap time of carriers from a deep trap can be prolonged by several orders of magnitude as compared to shallow traps, resulting in additional decay/response time of the device. Here, it is demonstrated that the trap states in 2D ReS2 can be efficiently modulated by defect engineering through molecule decoration. The deep traps that greatly prolong the response time can be mostly filled by protoporphyrin molecules. At the same time, carrier recombination and shallow traps in-turn play dominant roles in determining the decay time of the device, which can be several orders of magnitude faster than the as-prepared device. Moreover, the specific detectivity of the device is enhanced (as high as ≈1.89 × 1013 Jones) due to the significant reduction of the dark current through charge transfer between ReS2 and molecules. Defect engineering of trap states therefore provides a solution to achieve photodetectors with both high responsivity and fast response.
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Affiliation(s)
- Jie Jiang
- School of Physics and Key Laboratory of MEMS of the Ministry of Education, Southeast University, Nanjing, 211189, China
| | - Chongyi Ling
- School of Physics and Key Laboratory of MEMS of the Ministry of Education, Southeast University, Nanjing, 211189, China
| | - Tao Xu
- SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, Southeast University, Nanjing, 210096, China
| | - Wenhui Wang
- School of Physics and Key Laboratory of MEMS of the Ministry of Education, Southeast University, Nanjing, 211189, China
| | - Xianghong Niu
- School of Science, Nanjing University of Posts and Telecommunications, Nanjing, 210046, China
| | - Amina Zafar
- School of Physics and Key Laboratory of MEMS of the Ministry of Education, Southeast University, Nanjing, 211189, China
| | - Zhenzhong Yan
- School of Physics and Key Laboratory of MEMS of the Ministry of Education, Southeast University, Nanjing, 211189, China
| | - Xiaomu Wang
- School of Electronic Science and Technology, Nanjing University, Nanjing, 210093, China
| | - Yumeng You
- Ordered Matter Science Research Center, Southeast University, Nanjing, 211189, China
| | - Litao Sun
- SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, Southeast University, Nanjing, 210096, China
| | - Junpeng Lu
- School of Physics and Key Laboratory of MEMS of the Ministry of Education, Southeast University, Nanjing, 211189, China
| | - Jinlan Wang
- School of Physics and Key Laboratory of MEMS of the Ministry of Education, Southeast University, Nanjing, 211189, China
| | - Zhenhua Ni
- School of Physics and Key Laboratory of MEMS of the Ministry of Education, Southeast University, Nanjing, 211189, China
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267
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Zhang R, Xie Z, An C, Fan S, Zhang Q, Wu S, Xu L, Hu X, Zhang D, Sun D, Chen JH, Liu J. Ultraviolet Light-Induced Persistent and Degenerated Doping in MoS 2 for Potential Photocontrollable Electronics Applications. ACS APPLIED MATERIALS & INTERFACES 2018; 10:27840-27849. [PMID: 30062874 DOI: 10.1021/acsami.8b07196] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Efficient modulation of carrier concentration is fundamentally important for tailoring the electronic and photoelectronic properties of semiconducting materials. Photoinduced doping is potentially a promising way to realize such a goal for atomically thin nanomaterials in a rapid and defect-free manner. However, the wide applications of photoinduced doping in nanomaterials are severely constrained by the low doping concentration and poor stability that can be reached. Here, we propose a novel photoinduced doping mechanism based on the external photoelectric effect of metal coating on nanomaterials to significantly enhance the achievable doping concentration and stability. This approach is preliminarily demonstrated by an MX2 (M is Mo or Re; X is S or Se) nanoflake modified through a simple process of sequentially depositing and annealing an Au layer on the surface of the flake. Under ultraviolet (UV) light illumination, the modified MX2 achieves degenerated n-type doping density of 1014 cm-2 rapidly according to the experimentally observed >104 times increment in the channel current. The doping level persists after the removal of UV illumination with a nonobservable decrease over 1 day in vacuum (less than 23% over 7 days under an ambient environment). This photoinduced doping approach may contribute a major leap to the development of photocontrollable nanoelectronics.
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Affiliation(s)
- Rongjie Zhang
- State Key Laboratory of Precision Measurement Technology and Instruments, School of Precision Instruments and Opto-electronics Engineering , Tianjin University , No. 92 Weijin Road , Tianjin 300072 , China
| | - Zhijian Xie
- International Center for Quantum Materials, School of Physics , Peking University , No. 5 Yiheyuan Road , Beijing 100871 , China
| | - Chunhua An
- State Key Laboratory of Precision Measurement Technology and Instruments, School of Precision Instruments and Opto-electronics Engineering , Tianjin University , No. 92 Weijin Road , Tianjin 300072 , China
| | - Shuangqing Fan
- State Key Laboratory of Precision Measurement Technology and Instruments, School of Precision Instruments and Opto-electronics Engineering , Tianjin University , No. 92 Weijin Road , Tianjin 300072 , China
| | - Qiankun Zhang
- State Key Laboratory of Precision Measurement Technology and Instruments, School of Precision Instruments and Opto-electronics Engineering , Tianjin University , No. 92 Weijin Road , Tianjin 300072 , China
| | - Sen Wu
- State Key Laboratory of Precision Measurement Technology and Instruments, School of Precision Instruments and Opto-electronics Engineering , Tianjin University , No. 92 Weijin Road , Tianjin 300072 , China
| | - Linyan Xu
- State Key Laboratory of Precision Measurement Technology and Instruments, School of Precision Instruments and Opto-electronics Engineering , Tianjin University , No. 92 Weijin Road , Tianjin 300072 , China
| | - Xiaodong Hu
- State Key Laboratory of Precision Measurement Technology and Instruments, School of Precision Instruments and Opto-electronics Engineering , Tianjin University , No. 92 Weijin Road , Tianjin 300072 , China
| | - Daihua Zhang
- State Key Laboratory of Precision Measurement Technology and Instruments, School of Precision Instruments and Opto-electronics Engineering , Tianjin University , No. 92 Weijin Road , Tianjin 300072 , China
| | - Dong Sun
- International Center for Quantum Materials, School of Physics , Peking University , No. 5 Yiheyuan Road , Beijing 100871 , China
- Collaborative Innovation Center of Quantum Matter , Beijing 100871 , China
| | - Jian-Hao Chen
- International Center for Quantum Materials, School of Physics , Peking University , No. 5 Yiheyuan Road , Beijing 100871 , China
- Collaborative Innovation Center of Quantum Matter , Beijing 100871 , China
| | - Jing Liu
- State Key Laboratory of Precision Measurement Technology and Instruments, School of Precision Instruments and Opto-electronics Engineering , Tianjin University , No. 92 Weijin Road , Tianjin 300072 , China
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268
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Tan Q, Wang Q, Liu Y, Liu C, Feng X, Yu D. Enhanced magnetic properties and tunable Dirac point of graphene/Mn-doped monolayer MoS 2 heterostructures. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2018; 30:305304. [PMID: 29900880 DOI: 10.1088/1361-648x/aacca2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Graphene is one of the most promising spintronic materials due to its high carrier mobility. However, the absence of a band gap and ferromagnetic order in graphene seriously limit its applications in spintronics. How to utilize its high carrier mobility as well as mediate its electronic structure remains a challenge. Herein, we design a novel composite, which is composed of graphene and Mn-doped monolayer MoS2. The magnetic properties and electronic structures of graphene/Mn-doped monolayer MoS2 heterostructures were studied by using density functional theory (DFT) with the van der Waals (vdW) correlations (DFT-D). We found that the heterostructures show increased magnetic moments and more stable ferromagnetic (FM) states compared with that of isolated Mn-doped MoS2 monolayer. Our further studies show that many electrons are transferred to Mn-doped MoS2 monolayer from graphene, which causes the Fermi level to shift down below the Dirac cone about 0.59 eV. The transfered electrons also enhance the FM coupling between Mn ions. Graphene is partially spin polarized because of the magnetic proximity effect, which leads to the spin-dependent gaps for spin-up (16.1 meV) and spin-down (5 meV) at Dirac point, respectively. The introduction of sulfur (S) vacancy to the interface results in a much more stable FM structure and a higher total magnetic moment of the FM state; furthermore, it raises the spin polarization of graphene π orbitals and opens up a small band gap of about 7 meV. These findings propose a new route to facilitate the design of spintronic devices which both need stable ferromagnetism and finite band gap.
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Affiliation(s)
- Qiuhong Tan
- College of Physics and Electronic Information, Yunnan Normal University, Yunnan Kunming 650500, People's Republic of China. Yunnan Provincial Key Laboratory for Photoelectric Information Technology, Yunnan Normal University, Yunnan Kunming 650500, People's Republic of China
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269
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270
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Zhao J, Qi Z, Xu Y, Dai J, Zeng XC, Guo W, Ma J. Theoretical studies on tunable electronic structures and potential applications of two‐dimensional arsenene‐based materials. WILEY INTERDISCIPLINARY REVIEWS-COMPUTATIONAL MOLECULAR SCIENCE 2018. [DOI: 10.1002/wcms.1387] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Jun Zhao
- School of Chemistry and Chemical Engineering, Key Laboratory of Mesoscopic Chemistry of MOE Nanjing University Nanjing China
- School of Science Nanjing University of Posts and Telecommunications Nanjing China
| | - Zheng‐Hang Qi
- School of Chemistry and Chemical Engineering, Key Laboratory of Mesoscopic Chemistry of MOE Nanjing University Nanjing China
| | - Yong Xu
- State Key Laboratory of Low Dimensional Quantum Physics, Department of Physics Tsinghua University Beijing P. R. China
- Collaborative Innovation Center of Quantum Matter Beijing P. R. China
- RIKEN Center for Emergent Matter Science (CEMS) Saitama Japan
| | - Jun Dai
- Department of Chemistry University of Nebraska‐Lincoln Lincoln Nebraska
| | - Xiao Cheng Zeng
- Department of Chemistry University of Nebraska‐Lincoln Lincoln Nebraska
| | - Wanlin Guo
- State Key Laboratory of Mechanics and Control for Mechanical Structures and Key Laboratory for Intelligent Nano Materials and Devices (MOE) Nanjing University of Aeronautics and Astronautics Nanjing China
| | - Jing Ma
- School of Chemistry and Chemical Engineering, Key Laboratory of Mesoscopic Chemistry of MOE Nanjing University Nanjing China
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271
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Yang L, Xie C, Jin J, Ali RN, Feng C, Liu P, Xiang B. Properties, Preparation and Applications of Low Dimensional Transition Metal Dichalcogenides. NANOMATERIALS (BASEL, SWITZERLAND) 2018; 8:E463. [PMID: 29949877 PMCID: PMC6071048 DOI: 10.3390/nano8070463] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Revised: 06/22/2018] [Accepted: 06/22/2018] [Indexed: 11/28/2022]
Abstract
Low-dimensional layered transition metal dichalcogenides (TMDs) have recently emerged as an important fundamental research material because of their unique structural, physical and chemical properties. These novel properties make these TMDs a suitable candidate in numerous potential applications. In this review, we briefly summarize the properties of low-dimensional TMDs, and then focus on the various methods used in their preparation. The use of TMDs in electronic devices, optoelectronic devices, electrocatalysts, biosystems, and hydrogen storage is also explored. The cutting-edge future development probabilities of these materials and numerous research challenges are also outlined in this review.
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Affiliation(s)
- Lei Yang
- Key Laboratory of Biomimetic Sensor and Detecting Technology of Anhui Province, School of Materials and Chemical Engineering, West Anhui University, Lu'an 237012, China.
| | - Chenggen Xie
- Key Laboratory of Biomimetic Sensor and Detecting Technology of Anhui Province, School of Materials and Chemical Engineering, West Anhui University, Lu'an 237012, China.
| | - Juncheng Jin
- Key Laboratory of Biomimetic Sensor and Detecting Technology of Anhui Province, School of Materials and Chemical Engineering, West Anhui University, Lu'an 237012, China.
| | - Rai Nauman Ali
- Department of Materials Science & Engineering, CAS key Lab of Materials for Energy Conversion, Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China, Hefei 230026, China.
| | - Chao Feng
- Department of Materials Science & Engineering, CAS key Lab of Materials for Energy Conversion, Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China, Hefei 230026, China.
| | - Ping Liu
- Department of Materials Science & Engineering, CAS key Lab of Materials for Energy Conversion, Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China, Hefei 230026, China.
| | - Bin Xiang
- Department of Materials Science & Engineering, CAS key Lab of Materials for Energy Conversion, Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China, Hefei 230026, China.
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272
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Gao XG, Chen GX, Li DK, Li XK, Liu ZB, Tian JG. Modulation of photothermal anisotropy using black phosphorus/rhenium diselenide heterostructures. NANOSCALE 2018; 10:10844-10849. [PMID: 29854996 DOI: 10.1039/c8nr02229a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Manipulating the polarization of an incident beam using two-dimensional materials has become an important research direction towards the development of nano-optical devices. Black phosphorus (BP) and rhenium diselenide (ReSe2) possess excellent in-plane optical anisotropy with optical birefringence in the visible region, which has led to novel applications in polarizing optics and optoelectronics. Herein, the polarization-dependent absorption of BP and ReSe2 and a modulated pump beam is utilized to obtain the photothermal signal from them. The photothermal anisotropy of BP and ReSe2 has been explored using photothermal detection. Then we have defined the photothermal contrast using the ratio of the maximum to the minimum of the photothermal signal. The photothermal contrast of BP and ReSe2 can be obtained accurately by the relationship between the polarization angle of the pump light and the photothermal signal. We demonstrate that a layered BP with different thicknesses can remarkably change the photothermal contrast. In contrast, the photothermal contrast of ReSe2 does not change with the different thicknesses of the samples. Further, the photothermal anisotropies of BP/ReSe2 heterostructures were also explored. The photothermal contrasts of samples were observed to change with different stacking angles indicating that the photothermal anisotropy of heterostructures is dependent on the stacking angle. Our findings provide new prospects for designing novel optical devices based on two-dimensional anisotropic materials, with potential applications in electronics, photonics, and optoelectronics.
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Affiliation(s)
- Xiao-Guang Gao
- Key Laboratory of Weak Light Nonlinear Photonics, Ministry of Education, Teda Applied Physics Institute, and School of Physics, Nankai University, Tianjin 300457, China.
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Yang J, Yin X, Xia M, Zhang W. Tungsten disulfide nanosheets supported poly(xanthurenic acid) as a signal transduction interface for electrochemical genosensing applications. RSC Adv 2018; 8:39703-39709. [PMID: 35558023 PMCID: PMC9091227 DOI: 10.1039/c8ra08669a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Accepted: 11/22/2018] [Indexed: 11/21/2022] Open
Abstract
Tungsten disulfide (WS2) nanosheets supported poly(xanthurenic acid) (PXa) was used as the signal transduction interface for electrochemical genosensing. The WS2 nanosheets were obtained from bulk WS2 using a simple ultrasonic method. Due to the unique physical adsorption of Xa monomers to WS2, the electropolymerization efficiency was greatly improved, accompanied with an increased electrochemical response of PXa. The obtained PXa/WS2 nanocomposite not only served as a substrate for DNA immobilization but also reflected the electrochemical transduction originating from DNA immobilization and hybridization without any other indicators or complicated labelling steps. Owing to the presence of abundant carboxyl groups, the probe ssDNA was covalently attached on the carboxyl-terminated PXa/WS2 nanocomposite through the free amines of DNA sequences based on the 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide and N-hydrosulfosuccinimide crosslinking reaction. The covalently immobilized probe ssDNA could selectively hybridize with its target DNA to form dsDNA on the surface of the PXa/WS2 nanocomposite. This developed biosensor achieved a satisfactory detection limit down to 1.6 × 10−16 mol L−1 and a dynamic range of 1.0 × 10−15 to 1.0 × 10−11 mol L−1 for detection of circulating tumor DNA related to gastric carcinoma. Selectivity of the biosensor has been investigated in presence of non-complementary, one-mismatched and two-mismatched DNA sequences. An electrochemical signal transduction sensing interface for detecting PIK3CA gene was developed based on WS2 nanosheets supported PXa.![]()
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Affiliation(s)
- Jimin Yang
- School of Chemistry and Chemical Engineering
- Linyi University
- Linyi 276005
- China
| | - Xuesong Yin
- School of Chemistry and Chemical Engineering
- Linyi University
- Linyi 276005
- China
| | - Min Xia
- School of Chemistry and Chemical Engineering
- Linyi University
- Linyi 276005
- China
| | - Wei Zhang
- School of Chemistry and Chemical Engineering
- Linyi University
- Linyi 276005
- China
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