Temperature dependence of Raman spectra of graphene on copper foil substrate

We investigate the temperature dependence of the phonon frequencies of the G and 2D modes in the Raman spectra of monolayer graphene grown on copper foil by chemical vapor deposition. The Raman spectroscopy is carried out under a 532.16 nm laser excitation over the temperature range from 150 to 390 ...

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Bibliographic Details
Published in:Journal of materials science. Materials in electronics 2016-04, Vol.27 (4), p.3888-3893
Main Authors: Wang, Weihui, Peng, Qing, Dai, Yiquan, Qian, Zhengfang, Liu, Sheng
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
CHEMICAL VAPOR DEPOSITION
Chemistry and Materials Science
Copper
FOIL
Foils
Graphene
Materials Science
MECHANICAL PROPERTIES
Optical and Electronic Materials
Raman spectra
SILICON DIOXIDE
SPECTRA
Substrates
Temperature dependence
THERMAL EXPANSION COEFFICIENT
Two dimensional
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Summary:We investigate the temperature dependence of the phonon frequencies of the G and 2D modes in the Raman spectra of monolayer graphene grown on copper foil by chemical vapor deposition. The Raman spectroscopy is carried out under a 532.16 nm laser excitation over the temperature range from 150 to 390 K. Both the G and 2D modes exhibit significant red shift as temperature increases, and the extracted values of temperature coefficients of G and 2D modes are −0.101 and −0.180 cm −1  K −1 , respectively, different from that of graphene on SiO 2 substrate. The obtained results shed light on the anharmonic property of graphene, the complex interfacial interactions between graphene and the underlying copper foil substrate as temperature changes, and also proposes a new routine to estimate the thermal expansion coefficient of graphene on copper substrate rather than on SiO 2 and SiN substrates. Furthermore, our work is instructive to study the similar temperature dependent mechanical properties, and the interfacial interactions between the other emerging two dimensional materials and their underlying substrates by temperature dependent Raman scatterings.
ISSN:0957-4522
1573-482X
DOI:10.1007/s10854-015-4238-y