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

Journal Article · · Journal of the American Chemical Society
DOI:https://doi.org/10.1021/jacs.5b10144· OSTI ID:1235000
 [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)

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.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1235000
Journal Information:
Journal of the American Chemical Society, Vol. 137, Issue 49; ISSN 0002-7863
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 112 works
Citation information provided by
Web of Science

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Cited By (23)

Enhanced Raman scattering on functionalized graphene substrates journal April 2017
Advent of 2D Rhenium Disulfide (ReS 2 ): Fundamentals to Applications journal January 2017
Full-Scale Label-Free Surface-Enhanced Raman Scattering Analysis of Mouse Brain Using a Black Phosphorus-Based Two-Dimensional Nanoprobe journal January 2019
Spotting the differences in two-dimensional materials – the Raman scattering perspective journal January 2018
Phase transition induced Raman enhancement on vanadium dioxide (VO 2 ) nanosheets journal January 2018
In-Plane Optical Anisotropy of Low-Symmetry 2D GeSe journal December 2018
Recent Advances in 2D Inorganic Nanomaterials for SERS Sensing journal February 2019
Charge Transfer Doping Modulated Raman Scattering and Enhanced Stability of Black Phosphorus Quantum Dots on a ZnO Nanorod journal May 2018
Semiconductor SERS enhancement enabled by oxygen incorporation journal December 2017
Unraveling the Raman Enhancement Mechanism on 1T′-Phase ReS 2 Nanosheets journal February 2018
A two-dimensional fingerprint nanoprobe based on black phosphorus for bio-SERS analysis and chemo-photothermal therapy journal January 2018
A Review of Chinese Raman Spectroscopy Research Over the Past Twenty Years journal March 2019
Exploiting Anisotropy of Plasmonic Nanostructures with Polarization Modulation Infrared Linear Dichroism Microscopy (µPM-IRLD) journal January 2018
Emerging in‐plane anisotropic two‐dimensional materials journal March 2019
Charge transfer and electromagnetic enhancement processes revealed in the SERS and TERS of a CoPc thin film journal July 2019
Highly Efficient Infrared Photodetection in a Gate-Controllable Van der Waals Heterojunction with Staggered Bandgap Alignment journal January 2018
Doping modulated in-plane anisotropic Raman enhancement on layered ReS2 journal December 2018
Strain-engineering the in-plane electrical anisotropy of GeSe monolayers journal January 2020
Enhanced Raman Scattering of CuPc Films on Imperfect WSe 2 Monolayer Correlated to Exciton and Charge-Transfer Resonances journal October 2018
UV surface‐enhanced Raman scattering properties of SnSe 2 nanoflakes journal February 2020
Highly stable two-dimensional gold selenide with large in-plane anisotropy and ultrahigh carrier mobility journal January 2020
A highly sensitive and stable SERS substrate using hybrid tungsten dioxide/carbon ultrathin nanowire beams journal January 2018
Recent Development of SERS Technology: Semiconductor-Based Study journal November 2019

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