Probing thermal expansion coefficients of monolayers using surface enhanced Raman scattering

Duan Zhang; Ye Cun Wu; Mei Yang; Xiao Liu; Cormac Coileáin; Hongjun Xu; Mourad Abid; Mohamed Abid; Jing Jing Wang; Igor V. Shvets; Haonan Liu; Zhi Wang; Hongxing Yin; Huajun Liu; Byong Sun Chun; Xiangdong Zhang; Han Chun Wu

doi:10.1039/c6ra20623a

Probing thermal expansion coefficients of monolayers using surface enhanced Raman scattering

Duan Zhang, Ye Cun Wu, Mei Yang, Xiao Liu, Cormac Coileáin, Hongjun Xu, Mourad Abid, Mohamed Abid, Jing Jing Wang, Igor V. Shvets, Haonan Liu, Zhi Wang, Hongxing Yin, Huajun Liu, Byong Sun Chun, Xiangdong Zhang, Han Chun Wu^*

^*Corresponding author for this work

School of Physics

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

22 Citations (Scopus)

Abstract

Monolayer transition metal dichalcogenides exhibit remarkable electronic and optical properties, making them candidates for application within flexible nano-optoelectronics, however direct experimental determination of their thermal expansion coefficients (TECs) is difficult. Here, we propose a non-destructive method to probe the TECs of monolayer materials using surface-enhanced Raman spectroscopy (SERS). A strongly coupled Ag nanoparticle over-layer is used to controllably introduce temperature dependent strain in monolayers. Changes in the first-order temperature coefficient of the Raman shift, produced by TEC mismatch, can be used to estimate relative expansion coefficient of the monolayer. As a demonstration, the linear TEC of monolayer WS₂ is probed and is found to be 10.3 × 10^-6 K^-1, which would appear support theoretical predictions of a small TEC. This method opens a route to probe and control the TECs of monolayer materials.

Original language	English
Pages (from-to)	99053-99059
Number of pages	7
Journal	RSC Advances
Volume	6
Issue number	101
DOIs	https://doi.org/10.1039/c6ra20623a
Publication status	Published - 2016

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title = "Probing thermal expansion coefficients of monolayers using surface enhanced Raman scattering",

abstract = "Monolayer transition metal dichalcogenides exhibit remarkable electronic and optical properties, making them candidates for application within flexible nano-optoelectronics, however direct experimental determination of their thermal expansion coefficients (TECs) is difficult. Here, we propose a non-destructive method to probe the TECs of monolayer materials using surface-enhanced Raman spectroscopy (SERS). A strongly coupled Ag nanoparticle over-layer is used to controllably introduce temperature dependent strain in monolayers. Changes in the first-order temperature coefficient of the Raman shift, produced by TEC mismatch, can be used to estimate relative expansion coefficient of the monolayer. As a demonstration, the linear TEC of monolayer WS2 is probed and is found to be 10.3 × 10-6 K-1, which would appear support theoretical predictions of a small TEC. This method opens a route to probe and control the TECs of monolayer materials.",

author = "Duan Zhang and Wu, {Ye Cun} and Mei Yang and Xiao Liu and Cormac Coile{\'a}in and Hongjun Xu and Mourad Abid and Mohamed Abid and Wang, {Jing Jing} and Shvets, {Igor V.} and Haonan Liu and Zhi Wang and Hongxing Yin and Huajun Liu and Chun, {Byong Sun} and Xiangdong Zhang and Wu, {Han Chun}",

note = "Publisher Copyright: {\textcopyright} 2016 The Royal Society of Chemistry.",

year = "2016",

doi = "10.1039/c6ra20623a",

language = "English",

volume = "6",

pages = "99053--99059",

journal = "RSC Advances",

issn = "2046-2069",

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number = "101",

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TY - JOUR

T1 - Probing thermal expansion coefficients of monolayers using surface enhanced Raman scattering

AU - Zhang, Duan

AU - Wu, Ye Cun

AU - Yang, Mei

AU - Liu, Xiao

AU - Coileáin, Cormac

AU - Xu, Hongjun

AU - Abid, Mourad

AU - Abid, Mohamed

AU - Wang, Jing Jing

AU - Shvets, Igor V.

AU - Liu, Haonan

AU - Wang, Zhi

AU - Yin, Hongxing

AU - Liu, Huajun

AU - Chun, Byong Sun

AU - Zhang, Xiangdong

AU - Wu, Han Chun

PY - 2016

Y1 - 2016

N2 - Monolayer transition metal dichalcogenides exhibit remarkable electronic and optical properties, making them candidates for application within flexible nano-optoelectronics, however direct experimental determination of their thermal expansion coefficients (TECs) is difficult. Here, we propose a non-destructive method to probe the TECs of monolayer materials using surface-enhanced Raman spectroscopy (SERS). A strongly coupled Ag nanoparticle over-layer is used to controllably introduce temperature dependent strain in monolayers. Changes in the first-order temperature coefficient of the Raman shift, produced by TEC mismatch, can be used to estimate relative expansion coefficient of the monolayer. As a demonstration, the linear TEC of monolayer WS2 is probed and is found to be 10.3 × 10-6 K-1, which would appear support theoretical predictions of a small TEC. This method opens a route to probe and control the TECs of monolayer materials.

AB - Monolayer transition metal dichalcogenides exhibit remarkable electronic and optical properties, making them candidates for application within flexible nano-optoelectronics, however direct experimental determination of their thermal expansion coefficients (TECs) is difficult. Here, we propose a non-destructive method to probe the TECs of monolayer materials using surface-enhanced Raman spectroscopy (SERS). A strongly coupled Ag nanoparticle over-layer is used to controllably introduce temperature dependent strain in monolayers. Changes in the first-order temperature coefficient of the Raman shift, produced by TEC mismatch, can be used to estimate relative expansion coefficient of the monolayer. As a demonstration, the linear TEC of monolayer WS2 is probed and is found to be 10.3 × 10-6 K-1, which would appear support theoretical predictions of a small TEC. This method opens a route to probe and control the TECs of monolayer materials.

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U2 - 10.1039/c6ra20623a

DO - 10.1039/c6ra20623a

M3 - Article

AN - SCOPUS:84992337682

SN - 2046-2069

VL - 6

SP - 99053

EP - 99059

JO - RSC Advances

JF - RSC Advances

IS - 101

ER -

Probing thermal expansion coefficients of monolayers using surface enhanced Raman scattering

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