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Title: Enhanced Raman Scattering on In-plane Anisotropic Layered Materials

Abstract

Surface-enhanced Raman scattering (SERS) on two-dimensional (2D) layered materials has provided a unique platform to study the chemical mechanism (CM) of the enhancement due to its natural separation from electromagnetic enhancement. The CM stems from the basic charge interactions between the substrate and molecules. Despite the extensive studies of the energy alignment between 2D materials and molecules, an understanding of how the electronic properties of the substrate are explicitly involved in the charge interaction is still unclear. Lately, a new group of 2D layered materials with anisotropic structure, including orthorhombic black phosphorus (BP) and triclinic rhenium disulphide (ReS2), has attracted great interest due to their unique anisotropic electrical and optical properties. Herein, we report a unique anisotropic Raman enhancement on few-layered BP and ReS2 using copper phthalocyanine (CuPc) molecules as a Raman probe, which is absent on isotropic graphene and h-BN. According to detailed Raman tensor analysis and density functional theory calculations, anisotropic charge interactions due to the anisotropic carrier mobilities of the 2D materials are responsible for the angular dependence of the Raman enhancement. Our findings not only provide new insights into the CM process in SERS, but also open up new avenues for the exploration and application ofmore » the electronic properties of anisotropic 2D layered materials.« less

Authors:
 [1];  [2];  [1];  [3];  [4];  [4];  [4];  [4];  [4];  [4]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Rensselaer Polytechnic Inst., Troy, NY (United States)
  3. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  4. Chinese Academy of Sciences (CAS), Beijing (China). National Laboratory for Molecular Sciences (BNLMS)
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1235000
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Journal of the American Chemical Society
Additional Journal Information:
Journal Volume: 137; Journal Issue: 49; Journal ID: ISSN 0002-7863
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS

Citation Formats

Liang, Liangbo, Meunier, Vincent, Sumpter, Bobby G., Ling, Xi, Lin, Jingjing, Zhang, Shuqing, Mao, Nannan, Zhang, Na, Tong, Lianming, and Zhang, Jin. Enhanced Raman Scattering on In-plane Anisotropic Layered Materials. United States: N. p., 2015. Web. doi:10.1021/jacs.5b10144.
Liang, Liangbo, Meunier, Vincent, Sumpter, Bobby G., Ling, Xi, Lin, Jingjing, Zhang, Shuqing, Mao, Nannan, Zhang, Na, Tong, Lianming, & Zhang, Jin. Enhanced Raman Scattering on In-plane Anisotropic Layered Materials. United States. https://doi.org/10.1021/jacs.5b10144
Liang, Liangbo, Meunier, Vincent, Sumpter, Bobby G., Ling, Xi, Lin, Jingjing, Zhang, Shuqing, Mao, Nannan, Zhang, Na, Tong, Lianming, and Zhang, Jin. Thu . "Enhanced Raman Scattering on In-plane Anisotropic Layered Materials". United States. https://doi.org/10.1021/jacs.5b10144. https://www.osti.gov/servlets/purl/1235000.
@article{osti_1235000,
title = {Enhanced Raman Scattering on In-plane Anisotropic Layered Materials},
author = {Liang, Liangbo and Meunier, Vincent and Sumpter, Bobby G. and Ling, Xi and Lin, Jingjing and Zhang, Shuqing and Mao, Nannan and Zhang, Na and Tong, Lianming and Zhang, Jin},
abstractNote = {Surface-enhanced Raman scattering (SERS) on two-dimensional (2D) layered materials has provided a unique platform to study the chemical mechanism (CM) of the enhancement due to its natural separation from electromagnetic enhancement. The CM stems from the basic charge interactions between the substrate and molecules. Despite the extensive studies of the energy alignment between 2D materials and molecules, an understanding of how the electronic properties of the substrate are explicitly involved in the charge interaction is still unclear. Lately, a new group of 2D layered materials with anisotropic structure, including orthorhombic black phosphorus (BP) and triclinic rhenium disulphide (ReS2), has attracted great interest due to their unique anisotropic electrical and optical properties. Herein, we report a unique anisotropic Raman enhancement on few-layered BP and ReS2 using copper phthalocyanine (CuPc) molecules as a Raman probe, which is absent on isotropic graphene and h-BN. According to detailed Raman tensor analysis and density functional theory calculations, anisotropic charge interactions due to the anisotropic carrier mobilities of the 2D materials are responsible for the angular dependence of the Raman enhancement. Our findings not only provide new insights into the CM process in SERS, but also open up new avenues for the exploration and application of the electronic properties of anisotropic 2D layered materials.},
doi = {10.1021/jacs.5b10144},
journal = {Journal of the American Chemical Society},
number = 49,
volume = 137,
place = {United States},
year = {Thu Nov 19 00:00:00 EST 2015},
month = {Thu Nov 19 00:00:00 EST 2015}
}

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