1
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Kong F, Wang H, Tong Y, Zhang L, Zhang Y, Han X, Liu K, Dai J, Huang H, Sun C, Pan L, Li D. Precise Crystal Orientation Identification and Twist-Induced Giant Modulation of Optical Anisotropy in 1T'-ReS 2. ACS NANO 2024; 18:13899-13909. [PMID: 38757652 DOI: 10.1021/acsnano.4c03620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2024]
Abstract
The ability to precisely identify crystal orientation as well as to nondestructively modulate optical anisotropy in atomically thin rhenium dichalcogenides is critical for the future development of polarization programmable optoelectronic devices, which remains challenging. Here, we report a modified polarized optical imaging (POI) method capable of simultaneously identifying in-plane (Re chain) and out-of-plane (c-axis) crystal orientations of the monolayer to few-layer ReS2, meanwhile, propose a nondestructive approach to modulate the optical anisotropy in ReS2 via twist stacking. The results show that parallel and near-cross POI are effective to independently identify the in-plane and out-of-plane crystal orientations, respectively, while regulating the twist angle allows for giant modulation of in-plane optical anisotropy from highly intrinsic anisotropy to complete optical isotropy in the stacked ReS2 bilayer (with either the same or opposite c-axes), as well modeled by linear electromagnetic theory. Overall, this study not only develops a simple optical method for precise crystal orientation identification but also offers an efficient light polarization control strategy, which is a big step toward the practical application of anisotropic van der Waals materials in the design of nanophotonic and optoelectronic devices.
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Affiliation(s)
- Fanyi Kong
- School of Optoelectronic Engineering and Instrumentation Science, Dalian University of Technology, Dalian 116024, China
| | - Hu Wang
- School of Optoelectronic Engineering and Instrumentation Science, Dalian University of Technology, Dalian 116024, China
| | - Yunhao Tong
- School of Optoelectronic Engineering and Instrumentation Science, Dalian University of Technology, Dalian 116024, China
| | - Lei Zhang
- School of Optoelectronic Engineering and Instrumentation Science, Dalian University of Technology, Dalian 116024, China
| | - Yifeng Zhang
- School of Physics, Dalian University of Technology, Dalian 116024, China
| | - Xue Han
- School of Optoelectronic Engineering and Instrumentation Science, Dalian University of Technology, Dalian 116024, China
| | - Kun Liu
- School of Optoelectronic Engineering and Instrumentation Science, Dalian University of Technology, Dalian 116024, China
| | - Jianxun Dai
- School of Optoelectronic Engineering and Instrumentation Science, Dalian University of Technology, Dalian 116024, China
| | - Huolin Huang
- School of Optoelectronic Engineering and Instrumentation Science, Dalian University of Technology, Dalian 116024, China
| | - Changsen Sun
- School of Optoelectronic Engineering and Instrumentation Science, Dalian University of Technology, Dalian 116024, China
| | - Lujun Pan
- School of Physics, Dalian University of Technology, Dalian 116024, China
| | - Dawei Li
- School of Optoelectronic Engineering and Instrumentation Science, Dalian University of Technology, Dalian 116024, China
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2
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Harrison K, Jeff DA, DeStefano JM, Peek O, Kushima A, Chu JH, Gutiérrez HR, Khondaker SI. In-Plane Anisotropy in the Layered Topological Insulator Ta 2Ni 3Te 5 Investigated via TEM and Polarized Raman Spectroscopy. ACS NANO 2024. [PMID: 38306703 DOI: 10.1021/acsnano.3c09527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2024]
Abstract
Layered Ta2M3Te5 (M = Pd, Ni) has emerged as a platform to study 2D topological insulators, which have exotic properties such as spin-momentum locking and the presence of Dirac fermions for use in conventional and quantum-based electronics. In particular, Ta2Ni3Te5 has been shown to have superconductivity under pressure and is predicted to have second-order topology. Despite being an interesting material with fascinating physics, the detailed crystalline and phononic properties of this material are still unknown. In this study, we use transmission electron microscopy (TEM) and polarized Raman spectroscopy (PRS) to reveal the anisotropic properties of exfoliated few-layer Ta2Ni3Te5. An electron diffraction and TEM study reveals structural anisotropy in the material, with a preferential crystal orientation along the [010] direction. Through Raman spectroscopy, we discovered 15 vibrational modes, 3 of which are ultralow-frequency modes, which show anisotropic response with sample orientation varying with the polarization of the incident beam. Using angle-resolved PRS, we assigned the vibrational symmetries of 11 modes to Ag and two modes to B3g. We also found that linear dichroism plays a role in understanding the Raman signature of this material, which requires the use of complex elements in the Raman tensors. The anisotropy of the Raman scattering also depends on the excitation energies. Our observations reveal the anisotropic nature of Ta2Ni3Te5, establish a quick and nondestructive Raman fingerprint for determining sample orientation, and represent a significant advance in the fundamental understanding of the two-dimensional topological insulator (2DTI) Ta2Ni3Te5 material.
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Affiliation(s)
- Kamal Harrison
- NanoScience Technology Center and Department of Physics, University of Central Florida, Orlando, Florida 32816, United States
| | - Dylan A Jeff
- NanoScience Technology Center and Department of Physics, University of Central Florida, Orlando, Florida 32816, United States
| | - Jonathan M DeStefano
- Department of Physics, University of Washington, Seattle, Washington 98195, United States
| | - Olivia Peek
- Department of Physics, University of Washington, Seattle, Washington 98195, United States
| | - Akihiro Kushima
- Department of Materials Science and Engineering, and Advanced Materials Processing and Analysis Center, University of Central Florida, Orlando, Florida 32816, United States
| | - Jiun-Haw Chu
- Department of Physics, University of Washington, Seattle, Washington 98195, United States
| | - Humberto R Gutiérrez
- Department of Physics, University of South Florida, Tampa, Florida 33620, United States
| | - Saiful I Khondaker
- NanoScience Technology Center and Department of Physics, University of Central Florida, Orlando, Florida 32816, United States
- School of Electrical Engineering and Computer Science, University of Central Florida, Orlando, Florida 32826, United States
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3
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Yang S, Yu B, Ge R, Liu B, Qi R, Sun L, Zhao Q, Yue F. Optical properties of ferroic Fe 2O(SeO 3) 2 and Fe 2(SeO 3) 3·3H 2O. Phys Chem Chem Phys 2024; 26:3335-3341. [PMID: 38197880 DOI: 10.1039/d3cp04531e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2024]
Abstract
Ferroic compounds Fe2O(SeO3)2 (FSO) and Fe2(SeO3)3·3H2O (FSOH) prepared by the hydrothermal method are characterized and their optical properties are investigated by combining with first-principles calculations. The results show that (i) FSO is antiferromagnetic below ∼110 K and becomes ferromagnetic at elevated temperatures, while FSOH is antiferromagnetic at low temperatures probably due to a change in the spin state from Fe3+ (S = 5/2) to Fe2+ (S = 2); (ii) the optical bandgap is determined to be ∼2.83 eV for FSO and ∼2.15 eV for FSOH, consistent with the theoretical calculation; and (iii) the angle-resolved polarized Raman spectroscopy results of both crystals demonstrate the strong anisotropic light absorption and birefringence effects, and the unconventional symmetricity of some Raman modes is observed, which can be interpreted from the variation of Raman scattering elements. This work can provide not only an understanding of the structure and physical properties of iron selenites, but also a strategy for exploring the anomalous Raman behaviors in anisotropic crystals, facilitating the design and engineering of novel functional devices with low-symmetry ferroic materials.
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Affiliation(s)
- Shuai Yang
- Key Laboratory of Polar Materials and Devices (MOE), Department of Electronics, East China Normal University, Shanghai 200241, China.
| | - Bing Yu
- Key Laboratory of Polar Materials and Devices (MOE), Department of Electronics, East China Normal University, Shanghai 200241, China.
| | - Rui Ge
- Key Laboratory of Polar Materials and Devices (MOE), Department of Electronics, East China Normal University, Shanghai 200241, China.
| | - Beituo Liu
- Key Laboratory of Polar Materials and Devices (MOE), Department of Electronics, East China Normal University, Shanghai 200241, China.
| | - Ruijuan Qi
- Key Laboratory of Polar Materials and Devices (MOE), Department of Electronics, East China Normal University, Shanghai 200241, China.
| | - Lin Sun
- Key Laboratory of Polar Materials and Devices (MOE), Department of Electronics, East China Normal University, Shanghai 200241, China.
| | - Qingbiao Zhao
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430205, China.
| | - Fangyu Yue
- Key Laboratory of Polar Materials and Devices (MOE), Department of Electronics, East China Normal University, Shanghai 200241, China.
- Shanghai Center of Brain-inspired Intelligent Materials and Devices, East China Normal University, Shanghai 200241, China
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4
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You B, Xu Z, Yang J, Jiang X, Li Y, Shao G, Jin Y, Xiang H, Jiang H, Liu X, Sun J, Feng Y, Jiang Y, Pan A, Liu S. Interlayer Coupling in Anisotropic/Isotropic Van der Waals Heterostructures of ReS 2 and WS 2. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2304010. [PMID: 37726234 DOI: 10.1002/smll.202304010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Revised: 09/05/2023] [Indexed: 09/21/2023]
Abstract
Van der Waals (vdW) heterostructures are composed of atomically thin layers assembled through weak (vdW) force, which have opened a new era for integrating materials with distinct properties and specific applications. However, few studies have focused on whether and how anisotropic materials affect heterostructure system. The study introduces anisotropic and isotropic materials in a heterojunction system to change the in-plane symmetry, offering a new degree of freedom for modulating its properties. The sample is fabricated by manually stacking ReS2 and WS2 flakes prepared by mechanical exfoliation. Raman spectra and photoluminescence measurements confirm the formation of an effective heterojunction, indicating interlayer coupling of the system. The anisotropy and asymmetry of the WS2 -ReS2 heterostructure system can be adjusted by the introduction of isotropic WS2 and anisotropic ReS2 , which can be proved by the change of the polarized Raman pattern. In the transient absorption measurement, the transient absorption spectra of WS2 -ReS2 heterostructure are red-shifted compared to those of WS2 monolayer, and the charge transfer is observed in the heterostructure. These results show the potential of anisotropic 2D materials in anisotropy modulation of heterostructures, which may promote future electronic or photonic application.
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Affiliation(s)
- Bingying You
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
- Photonics Research Group, Ghent University-imec, Ghent, 9000, Belgium
| | - Zheyuan Xu
- Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan Institute of Optoelectronic Integration, College of Materials Science and Engineering, Hunan University, Changsha, 410082, P. R. China
| | - Junqiang Yang
- School of Physics and Electronics, Central South University, Changsha, 410083, P. R. China
| | - Xingxing Jiang
- School of Physics and Electronics, Hunan University, Changsha, 410082, P. R. China
| | - Yanfang Li
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
| | - Gonglei Shao
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
| | - Yuanyuan Jin
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
| | - Haiyan Xiang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
| | - Huili Jiang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
| | - Xiaochi Liu
- School of Physics and Electronics, Central South University, Changsha, 410083, P. R. China
| | - Jian Sun
- School of Physics and Electronics, Central South University, Changsha, 410083, P. R. China
| | - Yexing Feng
- School of Physics and Electronics, Hunan University, Changsha, 410082, P. R. China
| | - Ying Jiang
- School of Physics and Electronics, Hunan University, Changsha, 410082, P. R. China
| | - Anlian Pan
- Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan Institute of Optoelectronic Integration, College of Materials Science and Engineering, Hunan University, Changsha, 410082, P. R. China
| | - Song Liu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
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5
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Luo Y, Su W, Chen F, Wu K, Zeng Y, Lu HW. Observation of Strong Anisotropic Interlayer Excitons. ACS APPLIED MATERIALS & INTERFACES 2023; 15:54808-54817. [PMID: 37975532 DOI: 10.1021/acsami.3c12429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2023]
Abstract
Anisotropic interlayer excitons had been theoretically predicted to exist in two-dimensional (2D) anisotropy/isotropy van der Waals heterojunctions. However, experimental results consolidating the theoretical prediction and exploring the related anisotropic optoelectronic response have not been reported so far. Herein, strong photoluminescence (PL) of anisotropic interlayer excitons is observed in a symmetric anisotropy/isotropy/anisotropy heterojunction exemplified by 3L-ReS2/1L-MoS2/3L-ReS2 using monolayer (1L) MoS2 and trilayer (3L) ReS2 as components. Sharp interlayer exciton PL peaks centered at ∼1.64, ∼1.61, and ∼1.57 eV are only observed at low temperatures of ≤120 K and become more pronounced as the temperature decreases. These interlayer excitons exhibit strong anisotropic PL intensity variations with periodicities of 180° as functions of the incident laser polarization angles. The polarization ratios of these interlayer excitons are calculated to be 1.33-1.45. Our study gives new insight into the manipulation of excitons in 2D materials and paves a new way for a rational design of novel anisotropic optoelectronic devices.
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Affiliation(s)
- Yu Luo
- School of Sciences, Hangzhou Dianzi University, 310018 Hangzhou, China
| | - Weitao Su
- School of Sciences, Hangzhou Dianzi University, 310018 Hangzhou, China
| | - Fei Chen
- College of Materials and Environmental Engineering, Hangzhou Dianzi University, 310018 Hangzhou, China
| | - Ke Wu
- School of Sciences, Hangzhou Dianzi University, 310018 Hangzhou, China
| | - Yijie Zeng
- School of Sciences, Hangzhou Dianzi University, 310018 Hangzhou, China
| | - Hong-Wei Lu
- School of Sciences, Hangzhou Dianzi University, 310018 Hangzhou, China
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6
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Shi J, Feng S, He P, Fu Y, Zhang X. Nonlinear Optical Properties from Engineered 2D Materials. Molecules 2023; 28:6737. [PMID: 37764513 PMCID: PMC10535766 DOI: 10.3390/molecules28186737] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 09/17/2023] [Accepted: 09/19/2023] [Indexed: 09/29/2023] Open
Abstract
Two-dimensional (2D) materials with atomic thickness, tunable light-matter interaction, and significant nonlinear susceptibility are emerging as potential candidates for new-generation optoelectronic devices. In this review, we briefly cover the recent research development of typical nonlinear optic (NLO) processes including second harmonic generation (SHG), third harmonic generation (THG), as well as two-photon photoluminescence (2PPL) of 2D materials. Nonlinear light-matter interaction in atomically thin 2D materials is important for both fundamental research and future optoelectronic devices. The NLO performance of 2D materials can be greatly modulated with methods such as carrier injection tuning, strain tuning, artificially stacking, as well as plasmonic resonant enhancement. This review will discuss various nonlinear optical processes and corresponding tuning methods and propose its potential NLO application of 2D materials.
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Affiliation(s)
- Jia Shi
- Institute of Information Photonics Technology, Faculty of Science, Beijing University of Technology, Beijing 100124, China; (S.F.); (Y.F.); (X.Z.)
| | - Shifeng Feng
- Institute of Information Photonics Technology, Faculty of Science, Beijing University of Technology, Beijing 100124, China; (S.F.); (Y.F.); (X.Z.)
| | - Peng He
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore;
| | - Yulan Fu
- Institute of Information Photonics Technology, Faculty of Science, Beijing University of Technology, Beijing 100124, China; (S.F.); (Y.F.); (X.Z.)
| | - Xinping Zhang
- Institute of Information Photonics Technology, Faculty of Science, Beijing University of Technology, Beijing 100124, China; (S.F.); (Y.F.); (X.Z.)
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7
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van der Laan M, Heemskerk E, Kienhuis F, Diepeveen N, Poonia D, Kinge S, Dang MT, Dinh VA, Siebbeles LDA, Isaeva A, van de Groep J, Schall P. Stacking-Order-Dependent Excitonic Properties Reveal Interlayer Interactions in Bulk ReS 2. ACS PHOTONICS 2023; 10:3115-3123. [PMID: 37743944 PMCID: PMC10515696 DOI: 10.1021/acsphotonics.3c00477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Indexed: 09/26/2023]
Abstract
Rhenium disulfide, a member of the transition metal dichalcogenide family of semiconducting materials, is unique among 2D van der Waals materials due to its anisotropy and, albeit weak, interlayer interactions, confining excitons within single atomic layers and leading to monolayer-like excitonic properties even in bulk crystals. While recent work has established the existence of two stacking modes in bulk, AA and AB, the influence of the different interlayer coupling on the excitonic properties has been poorly explored. Here, we use polarization-dependent optical measurements to elucidate the nature of excitons in AA and AB-stacked rhenium disulfide to obtain insight into the effect of interlayer interactions. We combine polarization-dependent Raman with low-temperature photoluminescence and reflection spectroscopy to show that, while the similar polarization dependence of both stacking orders indicates similar excitonic alignments within the crystal planes, differences in peak width, position, and degree of anisotropy reveal a different degree of interlayer coupling. DFT calculations confirm the very similar band structure of the two stacking orders while revealing a change of the spin-split states at the top of the valence band to possibly underlie their different exciton binding energies. These results suggest that the excitonic properties are largely determined by in-plane interactions, however, strongly modified by the interlayer coupling. These modifications are stronger than those in other 2D semiconductors, making ReS2 an excellent platform for investigating stacking as a tuning parameter for 2D materials. Furthermore, the optical anisotropy makes this material an interesting candidate for polarization-sensitive applications such as photodetectors and polarimetry.
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Affiliation(s)
- Marco van der Laan
- Van
der Waals-Zeeman Institute, Institute of Physics, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Edwin Heemskerk
- Van
der Waals-Zeeman Institute, Institute of Physics, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Floris Kienhuis
- Van
der Waals-Zeeman Institute, Institute of Physics, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Nella Diepeveen
- Van
der Waals-Zeeman Institute, Institute of Physics, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Deepika Poonia
- Optoelectronic
Materials Section, Department of Chemical Engineering, Delft University of Technology, 2629 HZ Delft, The Netherlands
| | - Sachin Kinge
- Optoelectronic
Materials Section, Department of Chemical Engineering, Delft University of Technology, 2629 HZ Delft, The Netherlands
- Materials
Research & Development, Toyota Motor
Europe, B1930 Zaventem, Belgium
| | - Minh Triet Dang
- School
of Education, Can Tho University, 3-2 Road, Can Tho City 900000, Vietnam
| | - Van An Dinh
- Department
of Precision Engineering, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Laurens D. A. Siebbeles
- Optoelectronic
Materials Section, Department of Chemical Engineering, Delft University of Technology, 2629 HZ Delft, The Netherlands
| | - Anna Isaeva
- Van
der Waals-Zeeman Institute, Institute of Physics, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
- Leibniz
IFW Dresden, Helmholtzstr.
20, D-01069 Dresden, Germany
| | - Jorik van de Groep
- Van
der Waals-Zeeman Institute, Institute of Physics, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Peter Schall
- Van
der Waals-Zeeman Institute, Institute of Physics, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
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8
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Zou B, Wang X, Zhou Y, Zhou Y, Wu Y, Xing T, He Y, Yang J, Chen Y, Ren P, Sun H. Optical Effect Modulation in Polarized Raman Spectroscopy of Transparent Layered α-MoO 3. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2206932. [PMID: 36807515 DOI: 10.1002/smll.202206932] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 01/15/2023] [Indexed: 05/11/2023]
Abstract
Optical anisotropy, which is quantified by birefringence (Δn) and linear dichroism (Δk), can significantly modulate the angle-resolved polarized Raman spectroscopy (ARPRS) response of anisotropic layered materials (ALMs) by external interference. This work studies the separate modulation of birefringence on the ARPRS response and the intrinsic response by selecting transparent birefringent crystal α-MoO3 as an excellent platform. It is found that there are several anomalous ARPRS responses in α-MoO3 that cannot be reproduced by the real Raman tensor widely used in non-absorbing materials; however, they can be well explained by considering the birefringence-induced Raman selection rules. Moreover, the systematic thickness-dependent study indicates that birefringence modulates the ARPRS response to render an interference pattern; however, the amplitude of modulation is considerably lower than that by linear dichroism as occurred in black phosphorous. This weak modulation brings convenience to the crystal orientation determination of transparent ALMs. Combining the atomic vibrational pattern and bond polarizability model, the intrinsic ARPRS response of α-MoO3 is analyzed, giving the physical origins of the Raman anisotropy. This study employs α-MoO3 as an example, although it is generally applicable to all transparent birefringent ALMs.
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Affiliation(s)
- Bo Zou
- School of Science and Ministry of Industry and Information Technology Key Laboratory of Micro-Nano Optoelectronic Information System, Harbin Institute of Technology Shenzhen, Shenzhen, Guangdong, 518055, P. R. China
| | - Xiaonan Wang
- School of Science and Ministry of Industry and Information Technology Key Laboratory of Micro-Nano Optoelectronic Information System, Harbin Institute of Technology Shenzhen, Shenzhen, Guangdong, 518055, P. R. China
| | - Yu Zhou
- School of Science and Ministry of Industry and Information Technology Key Laboratory of Micro-Nano Optoelectronic Information System, Harbin Institute of Technology Shenzhen, Shenzhen, Guangdong, 518055, P. R. China
| | - Yan Zhou
- State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, P. R. China
| | - Yanyan Wu
- School of Science and Ministry of Industry and Information Technology Key Laboratory of Micro-Nano Optoelectronic Information System, Harbin Institute of Technology Shenzhen, Shenzhen, Guangdong, 518055, P. R. China
| | - Tiantian Xing
- School of Science and Ministry of Industry and Information Technology Key Laboratory of Micro-Nano Optoelectronic Information System, Harbin Institute of Technology Shenzhen, Shenzhen, Guangdong, 518055, P. R. China
| | - Yang He
- School of Science and Ministry of Industry and Information Technology Key Laboratory of Micro-Nano Optoelectronic Information System, Harbin Institute of Technology Shenzhen, Shenzhen, Guangdong, 518055, P. R. China
| | - Jinfeng Yang
- School of Science and Ministry of Industry and Information Technology Key Laboratory of Micro-Nano Optoelectronic Information System, Harbin Institute of Technology Shenzhen, Shenzhen, Guangdong, 518055, P. R. China
| | - Yuxiang Chen
- School of Science and Ministry of Industry and Information Technology Key Laboratory of Micro-Nano Optoelectronic Information System, Harbin Institute of Technology Shenzhen, Shenzhen, Guangdong, 518055, P. R. China
| | - Peng Ren
- School of Science and Ministry of Industry and Information Technology Key Laboratory of Micro-Nano Optoelectronic Information System, Harbin Institute of Technology Shenzhen, Shenzhen, Guangdong, 518055, P. R. China
| | - Huarui Sun
- School of Science and Ministry of Industry and Information Technology Key Laboratory of Micro-Nano Optoelectronic Information System, Harbin Institute of Technology Shenzhen, Shenzhen, Guangdong, 518055, P. R. China
- Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, Shanxi, 030006, P. R. China
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9
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Wen T, Zhang M, Li J, Jiao C, Pei S, Wang Z, Xia J. Orientation-polarization dependence of pressure-induced Raman anomalies in anisotropic 2D ReS 2. NANOSCALE HORIZONS 2023; 8:516-521. [PMID: 36790202 DOI: 10.1039/d2nh00584k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
We report an in situ high-pressure (0-30.24 GPa) optical study of the 2D ReS2 crystal under four specific configurations of sample orientation and laser polarization. Unlike the horizontal measurement configuration that has been widely used, under the vertical sample configuration we observe the anomalous disappearance behavior of Raman modes. Through analyzing the peak evolution under different configurations with tensor calculations, we identify the effect of pressure on different components in the full 3 × 3 Raman tensor of the anisotropic ReS2 crystal. These results provide new evidence on the remarkable tunability of pressure engineering on the crystal structure, and our methods offer an additional degree of freedom for studying pressure engineering on 2D anisotropic materials.
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Affiliation(s)
- Ting Wen
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China.
| | - Maodi Zhang
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China.
| | - Jing Li
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China.
| | - Chenyin Jiao
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China.
| | - Shenghai Pei
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China.
| | - Zenghui Wang
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China.
| | - Juan Xia
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China.
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10
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Liu Y, Yang S, Sui F, Qi R, Dong S, Yang P, Yue F. Abnormal vibrational anisotropy and thermal properties of a two-dimensional GeAs semiconductor. Phys Chem Chem Phys 2023; 25:3745-3751. [PMID: 36644899 DOI: 10.1039/d2cp05264d] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Anisotropy in a crystal structure plays a striking role in determining the optical, electrical and thermal properties of the condensed matter. Here, we investigated in-plane vibrational anisotropy in a two-dimensional (2D) van der Waals (vdW)-layered GeAs narrow-gap semiconductor by combining microstructural characterization and polarization Raman spectroscopy. Interestingly, not only the intensities but also the Raman shifts in all modes evolved periodically with different symmetries as the polarization angle changed continuously, which could be well-analyzed using the Raman tensors and further interpreted from the phonon dispersion relations. More importantly, the temperature-dependent Raman intensities of the Raman modes in the range from 83 K to 823 K gave a thermal-related uniform constant, based on which key parameters, including the thermal expansion coefficient, Grüneisen constant and quasi-particle lifetime, could be directly derived, which were in line with the calculated predictions. This investigation provides a comprehensive understanding of structure-dependent optical anisotropy in 2D vdW-layered GeAs and suggests a new idea for exploring the thermal properties of related materials using temperature-dependent Raman spectroscopy.
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Affiliation(s)
- Yucheng Liu
- Key Laboratory of Polar Materials and Devices (MOE), School of Physics and Electronic Science, East China Normal University, Shanghai 200062, China.
| | - Shuai Yang
- Key Laboratory of Polar Materials and Devices (MOE), School of Physics and Electronic Science, East China Normal University, Shanghai 200062, China.
| | - Fengrui Sui
- Key Laboratory of Polar Materials and Devices (MOE), School of Physics and Electronic Science, East China Normal University, Shanghai 200062, China.
| | - Ruijuan Qi
- Key Laboratory of Polar Materials and Devices (MOE), School of Physics and Electronic Science, East China Normal University, Shanghai 200062, China. .,State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information, Chinese Academy of Sciences, Shanghai 200050, China
| | - Shangwei Dong
- Key Laboratory of Polar Materials and Devices (MOE), School of Physics and Electronic Science, East China Normal University, Shanghai 200062, China.
| | - Pingxiong Yang
- Key Laboratory of Polar Materials and Devices (MOE), School of Physics and Electronic Science, East China Normal University, Shanghai 200062, China.
| | - Fangyu Yue
- Key Laboratory of Polar Materials and Devices (MOE), School of Physics and Electronic Science, East China Normal University, Shanghai 200062, China.
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11
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Huan Y, Luo T, Han X, Ge J, Cui F, Zhu L, Hu J, Zheng F, Zhao X, Wang L, Wang J, Zhang Y. Composition-Controllable Syntheses and Property Modulations from 2D Ferromagnetic Fe 5 Se 8 to Metallic Fe 3 Se 4 Nanosheets. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2207276. [PMID: 36263871 DOI: 10.1002/adma.202207276] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Revised: 09/27/2022] [Indexed: 06/16/2023]
Abstract
Exploring new-type 2D magnetic materials with high magnetic transition temperature and robust air stability has attracted wide attention for developing innovative spintronic devices. Recently, intercalation of native metal atoms into the van der Waals gaps of 2D layered transition metal dichalcogenides (TMDs) has been developed to form 2D non-layered magnetic TMDs, while only succeeded in limited systems (e.g., Cr2 S3 , Cr5 Te8 ). Herein, composition-controllable syntheses of 2D non-layered iron selenide nanosheets (25% Fe-intercalated triclinic Fe5 Se8 and 50% Fe-intercalated monoclinic Fe3 Se4 ) are firstly reported, via a robust chemical vapor deposition strategy. Specifically, the 2D Fe5 Se8 exhibits intrinsic room-temperature ferromagnetic property, which is explained by the change of electron spin states from layered 1T'-FeSe2 to non-layered Fe-intercalated Fe5 Se8 based on density functional theory calculations. In contrast, the ultrathin Fe3 Se4 presents novel metallic features comparable with that of metallic TMDs. This work hereby sheds light on the composition-controllable synthesis and fundamental property exploration of 2D self-intercalation induced novel TMDs compounds, by propelling their application explorations in nanoelectronics and spintronics-related fields.
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Affiliation(s)
- Yahuan Huan
- School of Materials Science and Engineering, Peking University, Beijing, 100871, P. R. China
| | - Tiantian Luo
- Siyuan Laboratory, Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Department of Physics, Jinan University, Guangzhou, 510632, P. R. China
| | - Xiaocang Han
- School of Materials Science and Engineering, Peking University, Beijing, 100871, P. R. China
| | - Jun Ge
- International Center for Quantum Materials, School of Physics, Peking University, Beijing, 100871, P. R. China
| | - Fangfang Cui
- School of Materials Science and Engineering, Peking University, Beijing, 100871, P. R. China
| | - Lijie Zhu
- School of Materials Science and Engineering, Peking University, Beijing, 100871, P. R. China
| | - Jingyi Hu
- School of Materials Science and Engineering, Peking University, Beijing, 100871, P. R. China
| | - Feipeng Zheng
- Siyuan Laboratory, Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Department of Physics, Jinan University, Guangzhou, 510632, P. R. China
| | - Xiaoxu Zhao
- School of Materials Science and Engineering, Peking University, Beijing, 100871, P. R. China
| | - Lili Wang
- State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing, 100084, P. R. China
| | - Jian Wang
- International Center for Quantum Materials, School of Physics, Peking University, Beijing, 100871, P. R. China
- Collaborative Innovation Center of Quantum Matter, Beijing, 100871, P. R. China
- CAS Center for Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing, 100190, P. R. China
- Beijing Academy of Quantum Information Sciences, Beijing, 100193, P. R. China
| | - Yanfeng Zhang
- School of Materials Science and Engineering, Peking University, Beijing, 100871, P. R. China
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12
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Yu J, Li Z, Jiang J, Liu W, Guo S, Liang Y, Zhong B, Wang Y, Zou M. Anisotropy study of phonon modes in ReS2 flakes by polarized temperature-dependent Raman spectroscopy. Chem Phys Lett 2022. [DOI: 10.1016/j.cplett.2022.140132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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13
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Guo Z, Wang L, Han M, Zhao E, Zhu L, Guo W, Tan J, Liu B, Chen XQ, Lin J. One-Step Growth of Bilayer 2H-1T' MoTe 2 van der Waals Heterostructures with Interlayer-Coupled Resonant Phonon Vibration. ACS NANO 2022; 16:11268-11277. [PMID: 35848623 DOI: 10.1021/acsnano.2c04664] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
2H-1T' MoTe2 van der Waals heterostructures (vdWHs) have promising applications in optoelectronics due to a seamlessly homogeneous semiconductor-metal coupled interface. However, the existing methods to fabricate such vdWHs involved complicated steps that may deteriorate the interfacial coupling and are also lacking precise thickness control capability. Here, a one-step growth method was developed to controllably grow bilayer 2H-1T' MoTe2 vdWHs in the small growth window overlapped for both phases. Atomic-resolution low-voltage transmission electron microscopy shows the distinct moiré patterns in the bilayer vdWHs, revealing the epitaxial nature of the top 2H phase with the lattice parameters regulated by the underneath 1T' phase. Such epitaxially stacked bilayer vdWHs modulate the interlayer coupling by resonating their vibration modes, as unveiled by the angle-resolved polarized Raman spectroscopy and first-principles calculations.
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Affiliation(s)
- Zenglong Guo
- Department of Physics, Shenzhen Institute for Quantum Science and Engineering (SIQSE), Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
- Shenzhen Key Laboratory of Advanced Quantum Functional Materials and Devices, Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
| | - Lei Wang
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 110016 Shenyang, People's Republic of China
- School of Materials Science and Engineering, University of Science and Technology of China, 110016 Shenyang, People's Republic of China
| | - Mengjiao Han
- Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, People's Republic of China
| | - Erding Zhao
- Department of Physics, Shenzhen Institute for Quantum Science and Engineering (SIQSE), Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
- Shenzhen Key Laboratory of Advanced Quantum Functional Materials and Devices, Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
| | - Liang Zhu
- Department of Physics, Shenzhen Institute for Quantum Science and Engineering (SIQSE), Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
- Shenzhen Key Laboratory of Advanced Quantum Functional Materials and Devices, Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
| | - Weiteng Guo
- Department of Physics, Shenzhen Institute for Quantum Science and Engineering (SIQSE), Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
- Shenzhen Key Laboratory of Advanced Quantum Functional Materials and Devices, Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
| | - Junyang Tan
- Shenzhen Geim Graphene Center, Tsinghua-Berkeley Shenzhen Institute and Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, People's Republic of China
| | - Bilu Liu
- Shenzhen Geim Graphene Center, Tsinghua-Berkeley Shenzhen Institute and Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, People's Republic of China
| | - Xing-Qiu Chen
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 110016 Shenyang, People's Republic of China
- School of Materials Science and Engineering, University of Science and Technology of China, 110016 Shenyang, People's Republic of China
| | - Junhao Lin
- Department of Physics, Shenzhen Institute for Quantum Science and Engineering (SIQSE), Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
- Shenzhen Key Laboratory of Advanced Quantum Functional Materials and Devices, Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
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14
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Park JM, Lee S, Na W, Kim K, Cheong H. Precise Determination of Offset between Optical Axis and Re-Chain Direction in Rhenium Disulfide. ACS NANO 2022; 16:9222-9227. [PMID: 35605130 DOI: 10.1021/acsnano.2c01560] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
ReS2 is a group-VII chalcogenide with a crystal structure that has inversion symmetry only. Due to the low symmetry, it has in-plane anisotropy, and the two vertical orientations are not equivalent. The in-plane anisotropy leads to optical birefringence that can be observed by using polarized optical microscopy. We found ReS2 crystals with domains of inequivalent vertical orientations but with the same Re-chain directions. Polarized Raman spectroscopy was used to determine the vertical orientations and the b-axis (Re-chain) directions of the domains, and high-resolution scanning transmission electron microscopy measurements confirmed that the Re-chain directions of the two types of the neighboring domains are exactly parallel. From polarized optical reflectivity measurements of the two types of domains, we found that the optical slow axis is not along the b-axis as previously believed but is tilted by ∼2.4° from the b-axis of the crystal. This offset makes the two neighboring domains with parallel Re-chains optically inequivalent and enables one to observe optical contrast between the two types of domains in polarized optical microscopy. We propose a quick and easy method to determine the crystallographic orientations of such domains by using polarized optical microscopy only.
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Affiliation(s)
- Je Myoung Park
- Department of Physics, Sogang University, Seoul 04107, Korea
| | - Sol Lee
- Department of Physics, Yonsei University, Seoul 03722, Republic of Korea
| | - Woongki Na
- Department of Physics, Sogang University, Seoul 04107, Korea
| | - Kwanpyo Kim
- Department of Physics, Yonsei University, Seoul 03722, Republic of Korea
| | - Hyeonsik Cheong
- Department of Physics, Sogang University, Seoul 04107, Korea
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15
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Zhou W, Feng Z, Xiong Y, Du G, Lin X, Su Q, Lou Y, An S, You Y. Visualization of Ferroelectric Domains in Thin Films of Molecular Materials Using Confocal Micro-Raman Spectroscopy. Chem Res Chin Univ 2022. [DOI: 10.1007/s40242-022-2102-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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16
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Zhou Y, Zhou S, Ying P, Zhao Q, Xie Y, Gong M, Jiang P, Cai H, Chen B, Tongay S, Zhang J, Jie W, Wang T, Tan P, Liu D, Kuball M. Unusual Deformation and Fracture in Gallium Telluride Multilayers. J Phys Chem Lett 2022; 13:3831-3839. [PMID: 35467342 PMCID: PMC9082608 DOI: 10.1021/acs.jpclett.2c00411] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The deformation and fracture mechanism of two-dimensional (2D) materials are still unclear and not thoroughly investigated. Given this, mechanical properties and mechanisms are explored on example of gallium telluride (GaTe), a promising 2D semiconductor with an ultrahigh photoresponsivity and a high flexibility. Hereby, the mechanical properties of both substrate-supported and suspended GaTe multilayers were investigated through Berkovich-tip nanoindentation instead of the commonly used AFM-based nanoindentation method. An unusual concurrence of multiple pop-in and load-drop events in loading curve was observed. Theoretical calculations unveiled this concurrence originating from the interlayer-sliding mediated layers-by-layers fracture mechanism in GaTe multilayers. The van der Waals force dominated interlayer interactions between GaTe and substrates was revealed much stronger than that between GaTe interlayers, resulting in the easy sliding and fracture of multilayers within GaTe. This work introduces new insights into the deformation and fracture of GaTe and other 2D materials in flexible electronics applications.
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Affiliation(s)
- Yan Zhou
- State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
- Center for Device Thermography and Reliability (CDTR), H. H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol BS8 1TL, U.K
| | - Shi Zhou
- University of Science and Technology of China, Hefei 230026, China
| | - Penghua Ying
- School of Science, Harbin Institute of Technology, Shenzhen 518055, China
| | - Qinghua Zhao
- State Key Laboratory of Solidification Processing, School of Materials Science, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Yong Xie
- School of Advanced Materials and Nanotechnology, Key Laboratory of Wide Band-Gap Semiconductor Materials and Devices, Xidian University, Xi'an, 710071, China
| | - Mingming Gong
- State Key Laboratory of Solidification Processing, School of Materials Science, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Pisu Jiang
- Center for Device Thermography and Reliability (CDTR), H. H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol BS8 1TL, U.K
| | - Hui Cai
- School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, Arizona, AZ85287, United States
| | - Bin Chen
- School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, Arizona, AZ85287, United States
| | - Sefaattin Tongay
- School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, Arizona, AZ85287, United States
| | - Jin Zhang
- School of Science, Harbin Institute of Technology, Shenzhen 518055, China
| | - Wanqi Jie
- State Key Laboratory of Solidification Processing, School of Materials Science, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Tao Wang
- State Key Laboratory of Solidification Processing, School of Materials Science, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Pingheng Tan
- State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
| | - Dong Liu
- Center for Device Thermography and Reliability (CDTR), H. H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol BS8 1TL, U.K
| | - Martin Kuball
- Center for Device Thermography and Reliability (CDTR), H. H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol BS8 1TL, U.K
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17
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Wen T, Li J, Deng Q, Jiao C, Zhang M, Wu S, Lin L, Huang W, Xia J, Wang Z. Analyzing Anisotropy in 2D Rhenium Disulfide Using Dichromatic Polarized Reflectance. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2108028. [PMID: 35315231 DOI: 10.1002/smll.202108028] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Revised: 03/01/2022] [Indexed: 06/14/2023]
Abstract
In-plane anisotropy in 2D rhenium disulfide (ReS2 ) offers intriguing opportunities for designing future electronic and optical devices, and toward such applications, it is crucial to identify the crystal orientation in such 2D anisotropic materials. Existing spectroscopy or electron microscopy methods for determining the crystalline orientation often require complicated sample preparing procedures and specialized equipment, which could sometimes limit their application. In this work, a dichromatic polarized reflectance method is demonstrated, which can quickly and accurately resolve the crystal orientation (Re-Re chain) in 2D ReS2 crystals with different thicknesses. Furthermore, it can be readily extended to multi-chromatic schemes to achieve greater measurement capability and can be easily tailored to work for different 2D materials. The method offers a simple and effective approach for studying anisotropy in 2D materials.
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Affiliation(s)
- Ting Wen
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 610054, P. R. China
| | - Jing Li
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 610054, P. R. China
| | - Qingyang Deng
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 610054, P. R. China
| | - Chenyin Jiao
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 610054, P. R. China
| | - Maodi Zhang
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 610054, P. R. China
| | - Song Wu
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 610054, P. R. China
| | - Lin Lin
- Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou, 313001, P. R. China
| | - Wen Huang
- Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou, 313001, P. R. China
| | - Juan Xia
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 610054, P. R. China
| | - Zenghui Wang
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 610054, P. R. China
- State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, 610054, P. R. China
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18
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Quantum interference directed chiral raman scattering in two-dimensional enantiomers. Nat Commun 2022; 13:1254. [PMID: 35273159 PMCID: PMC8913836 DOI: 10.1038/s41467-022-28877-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2021] [Accepted: 02/16/2022] [Indexed: 12/04/2022] Open
Abstract
Raman scattering spectroscopy has been a necessary and accurate tool not only for characterizing lattice structure, but also for probing electron-photon and electron-phonon interactions. In the quantum picture, electrons at ground states can be excited to intermediate energy levels by photons at different k-points in the Brillouin zone, then couple to phonons and emit photons with changed energies. The elementary Raman processes via all possible pathways can interfere with each other, giving rise to intriguing scattering effects. Here we report that quantum interference can lead to significant chiral Raman response in monolayer transitional metal dichalcogenide with triclinic symmetry. Large circular intensity difference observed for monolayer rhenium dichalcogenide originates from inter-k interference of Raman scattering excited by circularly polarized light with opposite helicities. Our results reveal chiral Raman spectra as a new manifestation of quantum interference in Raman scattering process, and may inspire induction of chiral optical response in other materials. Quantum interference among elementary Raman processes has only been observed in few materials under specific excitation configurations. Here, the authors show that quantum interference can lead to significant chiral Raman response in a monolayer material of transitional metal dichalcogenide with triclinic symmetry.
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19
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Wan Y, Hu T, Mao X, Fu J, Yuan K, Song Y, Gan X, Xu X, Xue M, Cheng X, Huang C, Yang J, Dai L, Zeng H, Kan E. Room-Temperature Ferroelectricity in 1T^{'}-ReS_{2} Multilayers. PHYSICAL REVIEW LETTERS 2022; 128:067601. [PMID: 35213175 DOI: 10.1103/physrevlett.128.067601] [Citation(s) in RCA: 31] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2021] [Accepted: 12/23/2021] [Indexed: 05/27/2023]
Abstract
van der Waals materials possess an innate layer degree of freedom and thus are excellent candidates for exploring emergent two-dimensional ferroelectricity induced by interlayer translation. However, despite being theoretically predicted, experimental realization of this type of ferroelectricity is scarce at the current stage. Here, we demonstrate robust sliding ferroelectricity in semiconducting 1T^{'}-ReS_{2} multilayers via a combined study of theory and experiment. Room-temperature vertical ferroelectricity is observed in two-dimensional 1T^{'}-ReS_{2} with layer number N≥2. The electric polarization stems from the uncompensated charge transfer between layers and can be switched by interlayer sliding. For bilayer 1T^{'}-ReS_{2}, the ferroelectric transition temperature is estimated to be ∼405 K from the second harmonic generation measurements. Our results highlight the importance of interlayer engineering in the realization of atomic-scale ferroelectricity.
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Affiliation(s)
- Yi Wan
- MIIT Key Laboratory of Semiconductor Microstructure and Quantum Sensing, and Department of Applied Physics, Nanjing University of Science and Technology, Nanjing 210094, China
- State Key Laboratory for Artificial Microstructure & Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, China
| | - Ting Hu
- MIIT Key Laboratory of Semiconductor Microstructure and Quantum Sensing, and Department of Applied Physics, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Xiaoyu Mao
- International Center for Quantum Design of Functional Materials (ICQD), Hefei National Laboratory for Physical Sciences at the Microscale, and Department of Physics, University of Science and Technology of China, Hefei 230026, China
| | - Jun Fu
- International Center for Quantum Design of Functional Materials (ICQD), Hefei National Laboratory for Physical Sciences at the Microscale, and Department of Physics, University of Science and Technology of China, Hefei 230026, China
| | - Kai Yuan
- State Key Laboratory for Artificial Microstructure & Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, China
- Collaborative Innovation Center of Quantum Matter, Beijing 100871, China
| | - Yu Song
- MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions, and Shaanxi Key Laboratory of Optical Information Technology, School of Science, Northwestern Polytechnical University, Xi'an 710072, China
| | - Xuetao Gan
- MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions, and Shaanxi Key Laboratory of Optical Information Technology, School of Science, Northwestern Polytechnical University, Xi'an 710072, China
| | - Xiaolong Xu
- State Key Laboratory for Artificial Microstructure & Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, China
| | - Mingzhu Xue
- State Key Laboratory for Artificial Microstructure & Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, China
| | - Xing Cheng
- State Key Laboratory for Artificial Microstructure & Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, China
| | - Chengxi Huang
- MIIT Key Laboratory of Semiconductor Microstructure and Quantum Sensing, and Department of Applied Physics, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Jinbo Yang
- State Key Laboratory for Artificial Microstructure & Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, China
- Collaborative Innovation Center of Quantum Matter, Beijing 100871, China
| | - Lun Dai
- State Key Laboratory for Artificial Microstructure & Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, China
- Collaborative Innovation Center of Quantum Matter, Beijing 100871, China
| | - Hualing Zeng
- International Center for Quantum Design of Functional Materials (ICQD), Hefei National Laboratory for Physical Sciences at the Microscale, and Department of Physics, University of Science and Technology of China, Hefei 230026, China
| | - Erjun Kan
- MIIT Key Laboratory of Semiconductor Microstructure and Quantum Sensing, and Department of Applied Physics, Nanjing University of Science and Technology, Nanjing 210094, China
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20
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Wu R, Qi M, Zhao Q, Huang Y, Zhou Y, Xu X. Anomalous polarization pattern evolution of Raman modes in few-layer ReS 2 by angle-resolved polarized Raman spectroscopy. NANOSCALE 2022; 14:1896-1905. [PMID: 35044412 DOI: 10.1039/d1nr06733h] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Low-symmetry of ReS2 has not only in-plane but also out-of-plane anisotropic light scattering, which is complicated, yet interesting with intrinsic strong electron-phonon coupling. In such a case, the Raman tensor also gets sophisticated with nine non-zero elements, which is layer-dependent for different Raman modes. Herein, we systematically investigated the polarization pattern evolution of both in-plane and out-of-plane Raman modes of few-layer ReS2 by angle-resolved polarized Raman spectroscopy. We found that in-plane Raman modes with less layer-dependence could be used to determine the crystal orientation (Re-chain direction) due to the weak electron-phonon interaction between layers. However, the out-of-plane and mixed vibration Raman modes demonstrate much evident layer-dependence due to the obvious electron-phonon interaction between layers. As such, the polarization patterns for the out-of-plane vibration Raman modes are distorted with layers in not only petal types but also maximum Raman intensity directions. This distortion is mainly due to the phase difference between Raman elements, which are complex values due to the near bandgap excitation laser. The results reveal that deep insights into anisotropy in low-symmetry two-dimensional materials could afford not only rich physics but also potential polarized optoelectronic devices.
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Affiliation(s)
- Ruowei Wu
- Shaanxi Joint Lab of Graphene, International Collaborative Center on Photoelectric Technology and Nano Functional Materials, State Key Laboratory of Photon-Technology in Western China Energy, Institute of Photonics & Photon-Technology, Northwest University, Xi'an 710069, China.
| | - Mei Qi
- School of Information Science and Technology, Northwest University, Xi'an 710127, China
| | - Qiyi Zhao
- School of Science, Xi'an University of Posts & Telecommunications, Xi'an 710121, China
| | - Yuanyuan Huang
- Shaanxi Joint Lab of Graphene, International Collaborative Center on Photoelectric Technology and Nano Functional Materials, State Key Laboratory of Photon-Technology in Western China Energy, Institute of Photonics & Photon-Technology, Northwest University, Xi'an 710069, China.
| | - Yixuan Zhou
- Shaanxi Joint Lab of Graphene, International Collaborative Center on Photoelectric Technology and Nano Functional Materials, State Key Laboratory of Photon-Technology in Western China Energy, Institute of Photonics & Photon-Technology, Northwest University, Xi'an 710069, China.
| | - Xinlong Xu
- Shaanxi Joint Lab of Graphene, International Collaborative Center on Photoelectric Technology and Nano Functional Materials, State Key Laboratory of Photon-Technology in Western China Energy, Institute of Photonics & Photon-Technology, Northwest University, Xi'an 710069, China.
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21
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Huang Y, Si J, Lin S, Lv H, Song W, Zhang R, Luo X, Lu W, Zhu X, Sun Y. Colossal 3D Electrical Anisotropy of MoAlB Single Crystal. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2104460. [PMID: 35112501 DOI: 10.1002/smll.202104460] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 09/30/2021] [Indexed: 06/14/2023]
Abstract
3D anisotropic functional properties (such as magnetic, electrical, thermal, and optical properties, etc.) in a single material are not only beneficial to the multipurpose of a material, but also helpful to enrich the regulatory dimensionality of functional materials. Herein, a colossal 3D electrical anisotropy of layered MAB-phase MoAlB single crystal is introduced and dissected. Using high-temperature metal-solution method, high-quality MoAlB single crystals are obtained and a surprisingly strong out-of-plane (σa /σb = 1.43 × 105 , at 2 K) and in-plane (σa /σc = 12.12, at 2 K) electrical anisotropies are first observed. After a series of experimental and theoretical investigations, it is demonstrated that the 3D anisotropic crystal structure and chemical bond of MoAlB result in its 3D anisotropic phonon vibration and electronic structure, influence the corresponding electron-electron as well as electron-phonon interactions, and finally give rise to its colossal 3D anisotropy of electrical conductivity. This work experimentally and theoretically proves MoAlB single crystal possessing the 3D anisotropies of crystal structure, chemical bond, phonon vibration, electronic structure, and electrical transport, but also provides a promising platform for the future design of functionalized electronic devices as well as synthesis of new and large-sized in-plane anisotropic 2D material (MoBene).
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Affiliation(s)
- Yanan Huang
- Key Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei, Anhui, 230031, P. R. China
| | - Jianguo Si
- Key Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei, Anhui, 230031, P. R. China
- University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Shuai Lin
- Key Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei, Anhui, 230031, P. R. China
| | - Hongyan Lv
- Key Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei, Anhui, 230031, P. R. China
| | - Wenhai Song
- Key Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei, Anhui, 230031, P. R. China
| | - Ranran Zhang
- High Magnetic Field Laboratory, HFIPS, Chinese Academy of Sciences, Hefei, Anhui, 230031, P. R. China
| | - Xuan Luo
- Key Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei, Anhui, 230031, P. R. China
| | - Wenjian Lu
- Key Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei, Anhui, 230031, P. R. China
| | - Xuebin Zhu
- Key Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei, Anhui, 230031, P. R. China
| | - Yuping Sun
- Key Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei, Anhui, 230031, P. R. China
- High Magnetic Field Laboratory, HFIPS, Chinese Academy of Sciences, Hefei, Anhui, 230031, P. R. China
- Collaborative Innovation Centre of Advanced Microstructures, Nanjing University, Nanjing, Jiangsu, 210093, P. R. China
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22
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Zhang X, Su G, Lu J, Yang W, Zhuang W, Han K, Wang X, Wan Y, Yu X, Yang P. Centimeter-Scale Few-Layer PdS 2: Fabrication and Physical Properties. ACS APPLIED MATERIALS & INTERFACES 2021; 13:43063-43074. [PMID: 34473488 DOI: 10.1021/acsami.1c11824] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
To develop next-generation electronic devices, novel semiconductive materials are urgently required. The transition metal dichalcogenides (TMDs) hold the promise of next generation of semiconductor materials for emerging electronic applications. As a member of the group-10 TMDs, PdS2 has a notable layer-number-dependent band structure and tremendously high carrier mobility at room temperature. Here, we demonstrate the experimental realization of centimeter-scale synthesis of the few-layer PdS2 by the combination of physical vapor deposition (PVD) and chemical vapor deposition (CVD) methods. For the first time, the optical anisotropic properties of the few-layer PdS2 were investigated through angle-resolved polarized Raman spectroscopy. Also, the evolution of Raman spectra was studied depending on the temperature in the range of 12-300 K. To further understand the electronic properties of the few-layer PdS2, the field-effect transistor (FET) devices were fabricated and investigated. The electronic measurements of such FET devices reveal that the PdS2 materials exhibit a tunable ambipolar transport mechanism with field-effect mobility of up to ∼388 cm2 V-1 s-1 and the on/off ratio of ∼800, which were not reported before in the literature. To well understand the experimental results, the electronic structure of PdS2 was determined using density functional theory (DFT) calculations. These excellent physical properties are very helpful in developing high-performance opto-electronic applications.
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Affiliation(s)
- Xudong Zhang
- National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming 650091, P. R. China
| | - Guowen Su
- National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming 650091, P. R. China
| | - Jiangwei Lu
- National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming 650091, P. R. China
| | - Wangfan Yang
- National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming 650091, P. R. China
| | - Wenbo Zhuang
- National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming 650091, P. R. China
| | - Kai Han
- National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming 650091, P. R. China
| | - Xiao Wang
- Faculty of Materials Science & Engineering, Kunming University of Science and Technology, Kunming 650093, P. R. China
| | - Yanfen Wan
- National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming 650091, P. R. China
| | - Xiaohua Yu
- Faculty of Materials Science & Engineering, Kunming University of Science and Technology, Kunming 650093, P. R. China
| | - Peng Yang
- National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming 650091, P. R. China
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23
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Xu B, Mao N, Zhao Y, Tong L, Zhang J. Polarized Raman Spectroscopy for Determining Crystallographic Orientation of Low-Dimensional Materials. J Phys Chem Lett 2021; 12:7442-7452. [PMID: 34338534 DOI: 10.1021/acs.jpclett.1c01889] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Raman spectroscopy is a fast and nondestructive characterization technique, which has been widely used for the characterization of the composition and structure information of various materials. The symmetry-dependent Raman tensor allows the detection of crystallographic orientation of materials by using polarization information. In this Perspective, we discuss polarized Raman spectroscopy as a powerful tool for determination of the crystallographic orientation of various materials. First, we introduce the basic principles of polarized Raman spectroscopy and the corresponding experimental setups; the determination of crystallographic orientation of two-dimensional (2D) materials with in-plane isotropy and in-plane anisotropy using linearly polarized Raman scattering are then discussed. Furthermore, we discuss that using circularly polarized Raman spectroscopy, the azimuthal angle of materials in three dimensions (3D) can be characterized. In the final section, we show that the orientation distribution of nanomaterial assemblies can be measured using polarized Raman spectroscopy by introducing the orientation distribution function.
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Affiliation(s)
- Bo Xu
- Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, P.R. China
- Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P.R. China
| | - Nannan Mao
- Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Yan Zhao
- Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, P.R. China
- Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P.R. China
| | - Lianming Tong
- Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P.R. China
| | - Jin Zhang
- Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P.R. China
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24
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Saito R, Ukhtary MS, Wang S, Hung NT. Selection rule for Raman spectra of two-dimensional materials using circularly-polarized vortex light. Phys Chem Chem Phys 2021; 23:17271-17278. [PMID: 34355711 DOI: 10.1039/d1cp02209a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Conservation of spin and orbital angular momenta of circularly-polarized vortex light is discussed for Raman spectra of two-dimensional materials. We first show the selection rule for optical absorption of two-dimensional materials as a function of the spin and orbital angular momentum of incident vortex light. In the case of two-dimensional materials, the Raman tensor for the incident vortex light does not change the symmetry of the phonon mode. Furthermore, the Raman active modes are classified by either "helicity-changing" or "helicity-conserved" Raman modes, in which the scattered photon of circularly polarized light either changes or does not change the helicity of the light, respectively. We show tables of selection rules for the Raman active modes of two-dimensional materials with 2, 3, 4, and 6 rotational symmetry for vortex light.
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Affiliation(s)
- Riichiro Saito
- Department of Physics, Tohoku University, Sendai 980-8578, Japan.
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25
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Das S, Prasad S, Chakraborty B, Jariwala B, Shradha S, Muthu DVS, Bhattacharya A, Waghmare UV, Sood AK. Doping controlled Fano resonance in bilayer 1T'-ReS 2: Raman experiments and first-principles theoretical analysis. NANOSCALE 2021; 13:1248-1256. [PMID: 33404576 DOI: 10.1039/d0nr06583h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
In the bilayer ReS2 channel of a field-effect transistor (FET), we demonstrate using Raman spectroscopy that electron doping (n) results in softening of frequency and broadening of linewidth for the in-plane vibrational modes, leaving the out-of-plane vibrational modes unaffected. The largest change is observed for the in-plane Raman mode at ∼151 cm-1, which also shows doping induced Fano resonance with the Fano parameter 1/q = -0.17 at a doping concentration of ∼3.7 × 1013 cm-2. A quantitative understanding of our results is provided by first-principles density functional theory (DFT), showing that the electron-phonon coupling (EPC) of in-plane modes is stronger than that of out-of-plane modes, and its variation with doping is independent of the layer stacking. The origin of large EPC is traced to 1T to 1T' structural phase transition of ReS2 involving in-plane displacement of atoms whose instability is driven by the nested Fermi surface of the 1T structure. Results are compared with those of the isostructural trilayer ReSe2.
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Affiliation(s)
- Subhadip Das
- Department of Physics, Indian Institute of Science, Bangalore 560012, India.
| | - Suchitra Prasad
- Theoretical Sciences Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore 560064, India
| | | | - Bhakti Jariwala
- Department of Condensed Matter Physics and Materials Science, Tata Institute of Fundamental Research, Mumbai 400005, India
| | - Sai Shradha
- Department of Condensed Matter Physics and Materials Science, Tata Institute of Fundamental Research, Mumbai 400005, India
| | - D V S Muthu
- Department of Physics, Indian Institute of Science, Bangalore 560012, India.
| | - Arnab Bhattacharya
- Department of Condensed Matter Physics and Materials Science, Tata Institute of Fundamental Research, Mumbai 400005, India
| | - U V Waghmare
- Theoretical Sciences Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore 560064, India
| | - A K Sood
- Department of Physics, Indian Institute of Science, Bangalore 560012, India.
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26
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Li X, Chen C, Yang Y, Lei Z, Xu H. 2D Re-Based Transition Metal Chalcogenides: Progress, Challenges, and Opportunities. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2020; 7:2002320. [PMID: 33304762 PMCID: PMC7709994 DOI: 10.1002/advs.202002320] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 08/22/2020] [Indexed: 05/16/2023]
Abstract
The rise of 2D transition-metal dichalcogenides (TMDs) materials has enormous implications for the scientific community and beyond. Among TMDs, ReX2 (X = S, Se) has attracted significant interest regarding its unusual 1T' structure and extraordinary properties in various fields during the past 7 years. For instance, ReX2 possesses large bandgaps (ReSe2: 1.3 eV, ReS2: 1.6 eV), distinctive interlayer decoupling, and strong anisotropic properties, which endow more degree of freedom for constructing novel optoelectronic, logic circuit, and sensor devices. Moreover, facile ion intercalation, abundant active sites, together with stable 1T' structure enable them great perspective to fabricate high-performance catalysts and advanced energy storage devices. In this review, the structural features, fundamental physicochemical properties, as well as all existing applications of Re-based TMDs materials are comprehensively introduced. Especially, the emerging synthesis strategies are critically analyzed and pay particular attention is paid to its growth mechanism with probing the assembly process of domain architectures. Finally, current challenges and future opportunities regarding the controlled preparation methods, property, and application exploration of Re-based TMDs are discussed.
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Affiliation(s)
- Xiaobo Li
- Key Laboratory of Applied Surface and Colloid ChemistryMinistry of EducationShaanxi Key Laboratory for Advanced Energy DevicesSchool of Materials Science and EngineeringShaanxi Normal UniversityXi'an710119P. R. China
| | - Chao Chen
- Key Laboratory of Applied Surface and Colloid ChemistryMinistry of EducationShaanxi Key Laboratory for Advanced Energy DevicesSchool of Materials Science and EngineeringShaanxi Normal UniversityXi'an710119P. R. China
| | - Yang Yang
- Key Laboratory of Applied Surface and Colloid ChemistryMinistry of EducationShaanxi Key Laboratory for Advanced Energy DevicesSchool of Materials Science and EngineeringShaanxi Normal UniversityXi'an710119P. R. China
| | - Zhibin Lei
- Key Laboratory of Applied Surface and Colloid ChemistryMinistry of EducationShaanxi Key Laboratory for Advanced Energy DevicesSchool of Materials Science and EngineeringShaanxi Normal UniversityXi'an710119P. R. China
| | - Hua Xu
- Key Laboratory of Applied Surface and Colloid ChemistryMinistry of EducationShaanxi Key Laboratory for Advanced Energy DevicesSchool of Materials Science and EngineeringShaanxi Normal UniversityXi'an710119P. R. China
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27
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Lin ML, Leng YC, Cong X, Meng D, Wang J, Li XL, Yu B, Liu XL, Yu XF, Tan PH. Understanding angle-resolved polarized Raman scattering from black phosphorus at normal and oblique laser incidences. Sci Bull (Beijing) 2020; 65:1894-1900. [PMID: 36738054 DOI: 10.1016/j.scib.2020.08.008] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 07/04/2020] [Accepted: 07/20/2020] [Indexed: 02/07/2023]
Abstract
The selection rule for angle-resolved polarized Raman (ARPR) intensity of phonons from standard group-theoretical method in isotropic materials would break down in anisotropic layered materials (ALMs) due to birefringence and linear dichroism effects. The two effects result in depth-dependent polarization and intensity of incident laser and scattered signal inside ALMs and thus make a challenge to predict ARPR intensity at any laser incidence direction. Herein, taking in-plane anisotropic black phosphorus as a prototype, we developed a so-called birefringence-linear-dichroism (BLD) model to quantitatively understand its ARPR intensity at both normal and oblique laser incidences by the same set of real Raman tensors for certain laser excitation. No fitting parameter is needed, once the birefringence and linear dichroism effects are considered with the complex refractive indexes. An approach was proposed to experimentally determine real Raman tensor and complex refractive indexes, respectively, from the relative Raman intensity along its principle axes and incident-angle resolved reflectivity by Fresnel's law. The results suggest that the previously reported ARPR intensity of ultrathin ALM flakes deposited on a multilayered substrate at normal laser incidence can be also understood based on the BLD model by considering the depth-dependent polarization and intensity of incident laser and scattered Raman signal induced by both birefringence and linear dichroism effects within ALM flakes and the interference effects in the multilayered structures, which are dependent on the excitation wavelength, thickness of ALM flakes and dielectric layers of the substrate. This work can be generally applicable to any opaque anisotropic crystals, offering a promising route to predict and manipulate the polarized behaviors of related phonons.
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Affiliation(s)
- Miao-Ling Lin
- State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
| | - Yu-Chen Leng
- State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China; Center of Materials Science and Optoelectronics Engineering & CAS Center of Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xin Cong
- State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China; Center of Materials Science and Optoelectronics Engineering & CAS Center of Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Da Meng
- State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China; Center of Materials Science and Optoelectronics Engineering & CAS Center of Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jiahong Wang
- Shenzhen Engineering Center for the Fabrication of Two-Dimensional Atomic Crystals, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Xiao-Li Li
- College of Physics Science and Technology, Hebei University, Baoding 071002, China
| | - Binlu Yu
- Shenzhen Engineering Center for the Fabrication of Two-Dimensional Atomic Crystals, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Xue-Lu Liu
- State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
| | - Xue-Feng Yu
- Shenzhen Engineering Center for the Fabrication of Two-Dimensional Atomic Crystals, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Ping-Heng Tan
- State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China; Center of Materials Science and Optoelectronics Engineering & CAS Center of Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing 100049, China; Beijing Academy of Quantum Information Science, Beijing 100193, China.
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28
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Zhao Y, Zhang S, Shi Y, Zhang Y, Saito R, Zhang J, Tong L. Characterization of Excitonic Nature in Raman Spectra Using Circularly Polarized Light. ACS NANO 2020; 14:10527-10535. [PMID: 32790282 DOI: 10.1021/acsnano.0c04467] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
We propose a technique of Raman spectroscopy to characterize the excitonic nature and to evaluate the relative contribution of the two kinds of electron/exciton-phonon interactions that are observed in two-dimensional transition-metal dichalcogenides (TMDCs). In the TMDCs, the electron/exciton-phonon interactions mainly originate from the deformation potential (DP) or the Fröhlich interaction (FI) which give the mutually different Raman tensors. Using a circularly polarized light, the relative proportion of the DP and the FI can be defined by the ratio of helicity-polarized intensity that is observed by MoS2. By this analysis, we show that the excitonic FI interaction gradually increases with decreasing temperature, contributes equally to DP at ∼230 K, and dominates at lower temperatures. The excitonic effect in the Raman spectra is confirmed by modulating the dielectric environment for the exciton and by changing the laser power.
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Affiliation(s)
- Yan Zhao
- Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, P.R. China
- Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P.R. China
| | - Shishu Zhang
- Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P.R. China
| | - Yuping Shi
- Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P.R. China
- Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, China
| | - Yanfeng Zhang
- Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P.R. China
- Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, China
| | - Riichiro Saito
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - Jin Zhang
- Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P.R. China
| | - Lianming Tong
- Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P.R. China
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29
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Qian Q, Shen X, Luo D, Jia L, Kozina M, Li R, Lin MF, Reid AH, Weathersby S, Park S, Yang J, Zhou Y, Zhang K, Wang X, Huang S. Coherent Lattice Wobbling and Out-of-Phase Intensity Oscillations of Friedel Pairs Observed by Ultrafast Electron Diffraction. ACS NANO 2020; 14:8449-8458. [PMID: 32538617 DOI: 10.1021/acsnano.0c02643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The inspection of Friedel's law in ultrafast electron diffraction (UED) is important to gain a comprehensive understanding of material atomic structure and its dynamic response. Here, monoclinic gallium telluride (GaTe), as a low-symmetry, layered crystal in contrast to many other 2D materials, is investigated by mega-electronvolt UED. Strong out-of-phase oscillations of Bragg peak intensities are observed for Friedel pairs, which does not obey Friedel's law. As evidenced by the preserved mirror symmetry and supported by both kinematic and dynamic scattering simulations, the intensity oscillations are provoked by the lowest-order longitudinal acoustic breathing phonon. Our results provide a generalized understanding of Friedel's law in UED and demonstrate that by designed misalignment of surface normal and primitive lattice vectors, coherent lattice wobbling and effective shear strain can be generated in crystal films by laser pulse excitation, which is otherwise hard to achieve and can be further utilized to dynamically tune and switch material properties.
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Affiliation(s)
- Qingkai Qian
- Department of Electrical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Xiaozhe Shen
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Duan Luo
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Lanxin Jia
- Department of Electrical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Michael Kozina
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Renkai Li
- Department of Engineering Physics, Tsinghua University, Beijing 100084, China
| | - Ming-Fu Lin
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Alexander H Reid
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Stephen Weathersby
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Suji Park
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Jie Yang
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Yu Zhou
- Department of Electrical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Kunyan Zhang
- Department of Electrical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Xijie Wang
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Shengxi Huang
- Department of Electrical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
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30
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Kim J, Lee JU, Cheong H. Polarized Raman spectroscopy for studying two-dimensional materials. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2020; 32:343001. [PMID: 32272465 DOI: 10.1088/1361-648x/ab8848] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Accepted: 04/09/2020] [Indexed: 06/11/2023]
Abstract
Raman spectroscopy has been established as one of the core experimental tools to study two-dimensional materials (2DMs) including graphene, black phosphorus, transitional metal chalcogenides, and other layered materials. If the polarization of the incident photons and the scattered photons are carefully controlled, the selection rules for the Raman scattering from phonon modes allow accurate mode assignments, which is not always possible in Raman scattering measurements using unpolarized light. Furthermore, polarized Raman spectroscopy can be used to determine the crystallographic orientation of isotropic 2DMs with in-plane strain or anisotropic 2DMs. This review explains the basics of polarized Raman spectroscopy, especially in the context of 2DMs research, and survey some of the most important applications of polarized Raman spectroscopy in isotropic and anisotropic 2DMs studies.
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Affiliation(s)
- Jungcheol Kim
- Department of Physics, Sogang University, Seoul 04107, Republic of Korea
| | - Jae-Ung Lee
- Department of Physics, Ajou University, Suwon 16499, Republic of Korea
| | - Hyeonsik Cheong
- Department of Physics, Sogang University, Seoul 04107, Republic of Korea
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31
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Wang X, Chen B, Mao J, Sha J, Ma L, Zhao N, He F. Boosting the stable sodium-ion storage performance by tailoring the 1D TiO2@ReS2 core-shell heterostructures. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.135695] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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32
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Cao S, Ma W, Zhai G, Xie Z, Gao X, Zhao Y, Ma X, Tong L, Jia S, Chen JH. Anisotropic Raman spectrum and transport properties of AuTe 2Br flakes. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2020; 32:12LT01. [PMID: 31778977 DOI: 10.1088/1361-648x/ab5cb4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Topological semimetal (TSM) AuTe2Br thin flakes have been studied by Raman spectroscopy and magneto-transport measurement. The angle-resolved polarized Raman spectrum of AuTe2Br (bulk and thin flake) shows strong anisotropy. Together with high resolution transmission electron microscopy (TEM), we establish a non-destructive method to determine the crystallographic orientation of AuTe2Br flakes. At high temperature (T > 50 K), the magneto-resistance (MR) of AuTe2Br thin flakes shows typical parabolic-like behavior, which can be well fitted by the two-fluid model. However, at low temperature (T ⩽ 30 K), the MR of thin flakes (<17 nm) clearly deviates from the two-fluid model as well as from the Kohler's rule, suggesting a new type of scattering emerging below 30 K. Several possible scattering mechanisms are discussed and the respective corrections to MR are compared with our experimental data. In addition, the conductivity of these metallic crystals is also found to be highly anisotropic, with the hole mobility along the a axis about five times higher than that along the c axis.
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Affiliation(s)
- Shimin Cao
- International Center of Quantum Materials, School of Physics, Peking University, Beijing 100871, People's Republic of China
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33
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He Q, Zhou J, Tang W, Hao Y, Sun L, Zhu C, Xu F, Chen J, Wu Y, Wu Z, Xu B, Liu G, Li X, Zhang C, Kang J. Deeply Exploring Anisotropic Evolution toward Large-Scale Growth of Monolayer ReS 2. ACS APPLIED MATERIALS & INTERFACES 2020; 12:2862-2870. [PMID: 31850729 DOI: 10.1021/acsami.9b18623] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Among large numbers of transition metal dichalcogenides (TMDCs), monolayer rhenium disulfide (ReS2) is of particular interest due to its unique structural anisotropy, which opens up unprecedented opportunities in dichroic atomical electronics. Understanding the domain structure and controlling the anisotropic evolution of ReS2 during the growth is considered critical for increasing the domain size toward a large-scale growth of monolayer ReS2. Herein, by employing angle-resolved Raman spectroscopy, we reveal that the hexagonal ReS2 domain is constructed by six well-defined subdomains with each b-axis parallel to the diagonal of the hexagon. By further combining the first-principles calculations and the transmission electron microscopy (TEM) characterization, a dislocation-involved anisotropic evolution is proposed to explain the formation of the domain structures and understand the limitation of the domain size. Based on these findings, growth rates of different crystal planes are well controlled to enlarge the domain size, and moreover, single-crystal domains with a triangle shape are obtained. With the improved domain size, large-scale uniform, strictly monolayer ReS2 films are grown further. Scalable field-effect transistor (FET) arrays are constructed, which show good electrical performances comparable or even superior to that of the single domains reported at room temperature. This work not only sheds light on comprehending the novel growth mechanism of ReS2 but also offers a robust and controllable strategy for the synthesis of large-area and high-quality two-dimensional materials with low structural symmetry.
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Affiliation(s)
| | | | | | - Yufeng Hao
- National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Collaborative Innovation Center of Advanced Microstructures, and Jiangsu Key Laboratory of Artificial Functional Materials , Nanjing University , Nanjing 210093 , P. R. China
- Haian Institute of New Technology , Nanjing University , Haian 226600 , P. R. China
- School of Physics and Microelectronics , Zhengzhou University , Zhengzhou , Henan 450001 , P. R. China
| | - Litao Sun
- SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of the Ministry of Education , Southeast University , Nanjing 210096 , P. R. China
| | - Chongyang Zhu
- SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of the Ministry of Education , Southeast University , Nanjing 210096 , P. R. China
| | - Feng Xu
- SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of the Ministry of Education , Southeast University , Nanjing 210096 , P. R. China
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Wang YY, Zhou JD, Jiang J, Yin TT, Yin ZX, Liu Z, Shen ZX. In-plane optical anisotropy in ReS 2 flakes determined by angle-resolved polarized optical contrast spectroscopy. NANOSCALE 2019; 11:20199-20205. [PMID: 31617546 DOI: 10.1039/c9nr07502j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Various in-plane anisotropic properties are observed for the layered semiconducting transition metal dichalcogenide (TMD), rhenium disulfide (ReS2) due to its reduced symmetry. The understanding of these unique anisotropic behaviors in ReS2 will promote its applications in optoelectronics. In this work, angle-resolved polarized optical contrast spectroscopy has proved to be an efficient, quantitative, and non-destructive method to probe the optical anisotropy in ReS2 flakes with different thicknesses. The contrast value of ReS2 displays the maximum intensity when the polarization of incident light is along the Re-Re chain direction, while the contrast shows the minimum value when the polarization is perpendicular. An empirical equation for in-plane anisotropic refractive index calculation has been proposed and the angle-resolved polarized optical contrasts of 1-3-layer ReS2 are calculated. The calculation results show good agreements with the experimental observations. This indicates that the proposed equation is indeed appropriate for the quantitative understanding of birefringence and dichroism in ReS2 flakes. Our results not only shed light on the identification of crystal axes in anisotropic materials by using angle-resolved polarized contrast spectroscopy, but also provide quantitative information about anisotropy in anisotropic materials such as ReS2.
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Affiliation(s)
- Ying Ying Wang
- Department of Optoelectronic Science, Harbin Institute of Technology at Weihai, Weihai 264209, China
| | - Jia Dong Zhou
- School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
| | - Jie Jiang
- School of Marine Science and Technology, Harbin Institute of Technology at Weihai, Weihai 264209, China and State Key Laboratory of Urban Water Resource & Environment, Harbin Institute of Technology, Harbin 150001, China
| | - Ting Ting Yin
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637616, Singapore.
| | - Zhi Xiong Yin
- Department of Physics, Sichuan University, Chengdu 610064, China
| | - Zheng Liu
- School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
| | - Ze Xiang Shen
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637616, Singapore.
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Zhang X, Zhang R, Wang Y, Zhang Y, Jiang T, Deng C, Zhang X, Qin S. In-plane anisotropy in twisted bilayer graphene probed by Raman spectroscopy. NANOTECHNOLOGY 2019; 30:435702. [PMID: 31323650 DOI: 10.1088/1361-6528/ab33e0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Monolayer graphene has high symmetrical crystal structure and exhibits in-plane isotropic physical properties. However, twisted bilayer graphene (tBLG) is expected to differ physically, due to the broken symmetry introduced by the interlayer coupling between adjacent graphene layers. This symmetry breaking is usually accompanied by in-plane anisotropy in their electrical, optical and thermal properties. However, the existence of in-plane anisotropy in tBLG has remained evasive until now. Here, an unambiguous identification of the in-plane anisotropy in tBLG is established by angle-resolved polarized Raman spectroscopy. It was found that the double-resonant two-dimensional band is anisotropic. The degree of in-plane anisotropy is found to be dependent on the misorientation angles, which is two- and four-fold for tBLG with misorientation angles of 15° and 20°, respectively. This finding adds a new dimension to the properties of graphene, which opens a possibility to the development of graphene-based angle-resolved photonics and electronics.
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Affiliation(s)
- Xiangzhe Zhang
- College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, 410073, People's Republic of China
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36
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Li F, Huang TD, Lan YW, Lu TH, Shen T, Simbulan KB, Qi J. Anomalous lattice vibrations of CVD-grown monolayer MoS 2 probed using linear polarized excitation light. NANOSCALE 2019; 11:13725-13730. [PMID: 31309958 DOI: 10.1039/c9nr03203g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
A novel physical phenomenon and advanced application have been explored in 2D low-dimensional van der Waals layered materials due to their reduced in-plane symmetry. The light-matter interaction is observed upon rapid characterization of the 2D material's crystal orientation. Here, the effects of the sample's rotation angle and the incident light's linear polarization angle on the Raman scattering of chemical vapor deposition (CVD)-grown monolayer MoS2 were investigated. The results show that the crystal orientation of monolayer MoS2 can be distinguished by analyzing the intensity ratio and frequency difference of its two dominant Raman vibration modes. In addition, an increase in the incident light's power intensity causes the Raman peaks to red shift due to the photothermal effect. Strikingly, it was found that, with an increase in the incident linear polarization angle, the out-of-plane A1g phonon mode red shifts, while the in-plane E2g1 phonon mode blue shifts. The frequency difference consequently decreases from 19.5 cm-1 to 17.4 cm-1. The anomalous lattice vibrations of monolayer MoS2 originate from the built-in strain introduced by the SiO2/Si substrate. This work paves the way for the investigation and characterization of 2D MoS2, providing further understanding of the light-matter interaction in 2D materials, which is beneficial for advanced studies on anisotropic MoS2 based electronic and photoelectric information technologies and sensing applications.
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Affiliation(s)
- Feng Li
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, People's Republic of China.
| | - Teng-De Huang
- Department of Physics, National Taiwan Normal University, Taipei 11677, Taiwan.
| | - Yann-Wen Lan
- Department of Physics, National Taiwan Normal University, Taipei 11677, Taiwan.
| | - Ting-Hua Lu
- Department of Physics, National Taiwan Normal University, Taipei 11677, Taiwan.
| | - Tao Shen
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, People's Republic of China.
| | | | - Junjie Qi
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, People's Republic of China.
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Pan J, Wang R, Xu X, Hu J, Ma L. Transition metal doping activated basal-plane catalytic activity of two-dimensional 1T'-ReS 2 for hydrogen evolution reaction: a first-principles calculation study. NANOSCALE 2019; 11:10402-10409. [PMID: 31111853 DOI: 10.1039/c9nr00997c] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The two-dimensional 1T' phase of ReS2 has a unique structure and its electronic properties are independent of its thickness. These features distinguish ReS2 from other two-dimensional transition metal dichalcogenides (TMDCs) used as catalysts in the hydrogen evolution reaction (HER) and suggest that it may be a suitable alternative catalyst to the expensive Pt most commonly in this reaction. Similar to traditional TMDCs, the catalytic activity of ReS2 is mainly contributed by the edge sites, whereas the basal plane, which accounts for a large percentage of the surface area, has poor catalytic activity. Activation of the basal plane of ReS2 would be an ideal strategy by which to boost its catalytic performance. We used density functional theory calculations to show that the catalytic activity of the ReS2 basal plane can be efficiently activated by doping with transition metal (TM) atoms such as Mo, Cr, Mn, Fe, Co, Pt, Au and Ag. Our results indicate that doping with a TM not only significantly reduces the hydrogen adsorption free energy (ΔGH*) of ReS2 by tuning the adsorption behavior of the H atom on the ReS2 surface, but can also expose more active sites by introducing more unsaturated electrons. Pt-doped ReS2 showed the highest catalytic activity for the HER of all the TM-doped ReS2 systems investigated, with ΔGH* = 0, a low reaction barrier and an increased density of active sites on the basal plane. More importantly, ReS2 doped with the non-noble TMs Mo and Cr showed excellent HER catalytic activities comparable with those of Pt-doped ReS2. Our findings will help to guide the future design of new HER catalysts based on TMDCs.
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Affiliation(s)
- Jing Pan
- College of Physics Science and Technology, Yangzhou University, Yangzhou, 225002, China.
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Wu J, Xie L. Structural Quantification for Graphene and Related Two-Dimensional Materials by Raman Spectroscopy. Anal Chem 2018; 91:468-481. [DOI: 10.1021/acs.analchem.8b04991] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Juanxia Wu
- CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, P. R. China
| | - Liming Xie
- CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, P. R. China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
- International College, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
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Liu Y, Gu Q, Peng Y, Qi S, Zhang N, Zhang Y, Ma X, Zhu R, Tong L, Feng J, Liu Z, Chen JH. Raman Signatures of Broken Inversion Symmetry and In-Plane Anisotropy in Type-II Weyl Semimetal Candidate TaIrTe 4. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1706402. [PMID: 29736942 DOI: 10.1002/adma.201706402] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Revised: 02/10/2018] [Indexed: 06/08/2023]
Abstract
The layered ternary compound TaIrTe4 is an important candidate to host the recently predicted type-II Weyl fermions. However, a direct and definitive proof of the absence of inversion symmetry in this material, a prerequisite for the existence of Weyl Fermions, has so far remained evasive. Herein, an unambiguous identification of the broken inversion symmetry in TaIrTe4 is established using angle-resolved polarized Raman spectroscopy. Combining with high-resolution transmission electron microscopy, an efficient and nondestructive recipe to determine the exact crystallographic orientation of TaIrTe4 crystals is demonstrated. Such technique could be extended to the fast identification and characterization of other type-II Weyl fermions candidates. A surprisingly strong in-plane electrical anisotropy in TaIrTe4 thin flakes is also revealed, up to 200% at 10 K, which is the strongest known electrical anisotropy for materials with comparable carrier density, notably in such good metals as copper and silver.
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Affiliation(s)
- Yinan Liu
- International Center for Quantum Materials, School of Physics, Peking University, No. 5 Yiheyuan Road, Beijing, 100871, China
| | - Qiangqiang Gu
- International Center for Quantum Materials, School of Physics, Peking University, No. 5 Yiheyuan Road, Beijing, 100871, China
| | - Yu Peng
- Centre for Programmed Materials, School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - Shaomian Qi
- International Center for Quantum Materials, School of Physics, Peking University, No. 5 Yiheyuan Road, Beijing, 100871, China
| | - Na Zhang
- College of Chemistry and Molecular Engineering, Peking University, No. 5 Yiheyuan Road, Beijing, 100871, China
| | - Yinong Zhang
- International Center for Quantum Materials, School of Physics, Peking University, No. 5 Yiheyuan Road, Beijing, 100871, China
| | - Xiumei Ma
- Electron Microscopy Laboratory, School of Physics, Peking University, Beijing, 100871, China
| | - Rui Zhu
- Electron Microscopy Laboratory, School of Physics, Peking University, Beijing, 100871, China
| | - Lianming Tong
- College of Chemistry and Molecular Engineering, Peking University, No. 5 Yiheyuan Road, Beijing, 100871, China
| | - Ji Feng
- International Center for Quantum Materials, School of Physics, Peking University, No. 5 Yiheyuan Road, Beijing, 100871, China
- CAS Center for Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing, 100190, China
- Collaborative Innovation Center of Quantum Matter, Beijing, 100871, China
| | - Zheng Liu
- Centre for Programmed Materials, School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore
- NOVITAS, Nanoelectronics Centre of Excellence, School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - 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
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40
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Li L, Wang W, Gong P, Zhu X, Deng B, Shi X, Gao G, Li H, Zhai T. 2D GeP: An Unexploited Low-Symmetry Semiconductor with Strong In-Plane Anisotropy. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1706771. [PMID: 29479747 DOI: 10.1002/adma.201706771] [Citation(s) in RCA: 95] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Revised: 12/18/2017] [Indexed: 05/23/2023]
Abstract
Germanium phosphide (GeP), a new member of the Group IV-Group V compounds, is introduced into the fast growing 2D family with experimental and theoretical demonstration of strong anisotropic physical properties. The indirect band gap of GeP can be drastically tuned from 1.68 eV for monolayer to 0.51 eV for bulk, with highly anisotropic dispersions of band structures. Thin GeP shows strong anisotropy of phonon vibrations. Moreover, photodetectors based on GeP flakes show highly anisotropic behavior with anisotropic factors of 1.52 and 1.83 for conductance and photoresponsivity, respectively. This work lays the foundation and ignites future research interests in Group IV-Group V compound 2D materials.
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Affiliation(s)
- Liang Li
- State Key Laboratory of Material Processing and Die and Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan, 430074, P. R. China
| | - Weike Wang
- Synergetic Innovation Center for Quantum Effects and Application, Key Laboratory of Low-dimensional Quantum Structures and Quantum Control of Ministry of Education, College of Physics and Information Science, Hunan Normal University, Changsha, 410081, P. R. China
| | - Penglai Gong
- Department of Physics, Southern University of Science and Technology, Shenzhen, 518055, P. R. China
| | - Xiangde Zhu
- Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory of the Chinese Academy of Science, Hefei, 230031, P. R. China
| | - Bei Deng
- Department of Physics, Southern University of Science and Technology, Shenzhen, 518055, P. R. China
| | - Xingqiang Shi
- Department of Physics, Southern University of Science and Technology, Shenzhen, 518055, P. R. China
| | - Guoying Gao
- School of Physics, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China
| | - Huiqiao Li
- State Key Laboratory of Material Processing and Die and Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan, 430074, P. R. China
| | - Tianyou Zhai
- State Key Laboratory of Material Processing and Die and Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan, 430074, P. R. China
- Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, Tianjin University, and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin, 300072, P. R. China
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41
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Miao P, Qin JK, Shen Y, Su H, Dai J, Song B, Du Y, Sun M, Zhang W, Wang HL, Xu CY, Xu P. Unraveling the Raman Enhancement Mechanism on 1T'-Phase ReS 2 Nanosheets. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2018; 14:e1704079. [PMID: 29411513 DOI: 10.1002/smll.201704079] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Revised: 12/19/2017] [Indexed: 06/08/2023]
Abstract
2D transition metal dichalcogenides materials are explored as potential surface-enhanced Raman spectroscopy substrates. Herein, a systematic study of the Raman enhancement mechanism on distorted 1T (1T') rhenium disulfide (ReS2 ) nanosheets is demonstrated. Combined Raman and photoluminescence studies with the introduction of an Al2 O3 dielectric layer unambiguously reveal that Raman enhancement on ReS2 materials is from a charge transfer process rather than from an energy transfer process, and Raman enhancement is inversely proportional while the photoluminescence quenching effect is proportional to the layer number (thickness) of ReS2 nanosheets. On monolayer ReS2 film, a strong resonance-enhanced Raman scattering effect dependent on the laser excitation energy is detected, and a detection limit as low as 10-9 m can be reached from the studied dye molecules such as rhodamine 6G and methylene blue. Such a high enhancement factor achieved through enhanced charge interaction between target molecule and substrate suggests that with careful consideration of the layer-number-dependent feature and excitation-energy-related resonance effect, ReS2 is a promising Raman enhancement platform for sensing applications.
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Affiliation(s)
- Peng Miao
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, China
| | - Jing-Kai Qin
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150001, China
| | - Yunfeng Shen
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, China
| | - Huimin Su
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Junfeng Dai
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Bo Song
- Academy of Fundamental and Interdisciplinary Sciences, Department of Physics, Harbin Institute of Technology, Harbin, 150001, China
| | - Yunchen Du
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, China
| | - Mengtao Sun
- Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science, Center for Green Innovation, School of Mathematics and Physics, University of Science and Technology, Beijing, 100083, China
| | - Wei Zhang
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 400714, China
| | - Hsing-Lin Wang
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Cheng-Yan Xu
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150001, China
| | - Ping Xu
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, China
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Zhang S, Zhang N, Zhao Y, Cheng T, Li X, Feng R, Xu H, Liu Z, Zhang J, Tong L. Spotting the differences in two-dimensional materials – the Raman scattering perspective. Chem Soc Rev 2018; 47:3217-3240. [DOI: 10.1039/c7cs00874k] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This review discusses the Raman spectroscopic characterization of 2D materials with a focus on the “differences” from primitive 2D materials.
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