Raman analysis of gold on WSe2 single crystal film

Bablu Mukherjee; Wei Sun Leong; Yida Li; Hao Gong; Linfeng Sun; Ze Xiang Shen; Ergun Simsek; John T.L. Thong

doi:10.1088/2053-1591/2/6/065009

Raman analysis of gold on WSe₂ single crystal film

Bablu Mukherjee, Wei Sun Leong, Yida Li, Hao Gong, Linfeng Sun, Ze Xiang Shen, Ergun Simsek, John T.L. Thong

Research output: Contribution to journal › Article › peer-review

23 Citations (Scopus)

Abstract

Synthesis and characterization of high-quality single-crystal tungsten diselenide (WSe₂) films on a highly insulating substrate is presented. We demonstrate for the first time that the presence of gold (Au) nanoparticles in the basal plane of a WSe₂ film can enhance its Raman scattering intensity. The experimentally observed enhancement ratio in the Raman signal correlates well with the simulated electric field intensity using both three-dimensional electromagnetic software and theoretical calculation considering layered medium coupled-dipole approximation (LM-CDA). This work serves as a guideline for the use of Au nanoparticles on WSe₂ single-crystal thin films for surface enhanced Raman scattering (SERS) applications in the future.

Original language	English
Article number	65009
Journal	Materials Research Express
Volume	2
Issue number	6
DOIs	https://doi.org/10.1088/2053-1591/2/6/065009
Publication status	Published - Jun 2015
Externally published	Yes

Keywords

Au nanoparticles
Transition metal dichalcogenides
Tungsten diselenide
Two-dimensional materials

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10.1088/2053-1591/2/6/065009

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title = "Raman analysis of gold on WSe2 single crystal film",

abstract = "Synthesis and characterization of high-quality single-crystal tungsten diselenide (WSe2) films on a highly insulating substrate is presented. We demonstrate for the first time that the presence of gold (Au) nanoparticles in the basal plane of a WSe2 film can enhance its Raman scattering intensity. The experimentally observed enhancement ratio in the Raman signal correlates well with the simulated electric field intensity using both three-dimensional electromagnetic software and theoretical calculation considering layered medium coupled-dipole approximation (LM-CDA). This work serves as a guideline for the use of Au nanoparticles on WSe2 single-crystal thin films for surface enhanced Raman scattering (SERS) applications in the future.",

keywords = "Au nanoparticles, Transition metal dichalcogenides, Tungsten diselenide, Two-dimensional materials",

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AU - Mukherjee, Bablu

AU - Leong, Wei Sun

AU - Li, Yida

AU - Gong, Hao

AU - Sun, Linfeng

AU - Shen, Ze Xiang

AU - Simsek, Ergun

AU - Thong, John T.L.

PY - 2015/6

Y1 - 2015/6

N2 - Synthesis and characterization of high-quality single-crystal tungsten diselenide (WSe2) films on a highly insulating substrate is presented. We demonstrate for the first time that the presence of gold (Au) nanoparticles in the basal plane of a WSe2 film can enhance its Raman scattering intensity. The experimentally observed enhancement ratio in the Raman signal correlates well with the simulated electric field intensity using both three-dimensional electromagnetic software and theoretical calculation considering layered medium coupled-dipole approximation (LM-CDA). This work serves as a guideline for the use of Au nanoparticles on WSe2 single-crystal thin films for surface enhanced Raman scattering (SERS) applications in the future.

AB - Synthesis and characterization of high-quality single-crystal tungsten diselenide (WSe2) films on a highly insulating substrate is presented. We demonstrate for the first time that the presence of gold (Au) nanoparticles in the basal plane of a WSe2 film can enhance its Raman scattering intensity. The experimentally observed enhancement ratio in the Raman signal correlates well with the simulated electric field intensity using both three-dimensional electromagnetic software and theoretical calculation considering layered medium coupled-dipole approximation (LM-CDA). This work serves as a guideline for the use of Au nanoparticles on WSe2 single-crystal thin films for surface enhanced Raman scattering (SERS) applications in the future.

KW - Au nanoparticles

KW - Transition metal dichalcogenides

KW - Tungsten diselenide

KW - Two-dimensional materials

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Raman analysis of gold on WSe₂ single crystal film

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Keywords

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