Thermal conductivity measurements of suspended graphene with and without wrinkles by micro-Raman mapping

被引：132

作者：

Chen, Shanshan ^{[1
,2
,3
]}

Li, Qiongyu ^{[1
]}

Zhang, Qimin ^{[1
]}

Qu, Yan ^{[4
]}

Ji, Hengxing ^{[2
,3
]}

Ruoff, Rodney S. ^{[2
,3
]}

Cai, Weiwei ^{[1
]}

机构：

[1] Xiamen Univ, Dept Phys, Xiamen 361005, Peoples R China

[2] Univ Texas Austin, Dept Mech Engn, Austin, TX 78712 USA

[3] Univ Texas Austin, Mat Sci & Engn Program, Austin, TX 78712 USA

[4] Sixth Element Changzhou Mat Technol Co Ltd, Changzhou, Peoples R China

来源：

NANOTECHNOLOGY | 2012年 / 23卷 / 36期

基金：

美国国家科学基金会; 中国国家自然科学基金;

关键词：

PYROLYTIC GRAPHITE;

D O I：

10.1088/0957-4484/23/36/365701

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The thermal conductivity (kappa) of suspended graphene membranes made by chemical vapor deposition (CVD) was measured by micro-Raman mapping. Cracks and wrinkles present in these suspended graphene membranes were identified by micro-Raman mapping, and kappa values and their statistics were obtained on membranes free of such imperfections in a single mapping. Based on this new technique, an average kappa value of 1875 +/- 220 W m(-1) K-1 at 420 K was measured on 26 suspended graphene membranes that were free of wrinkles, similar to 27% higher than the average value measured from 12 graphene membranes with wrinkles. These results suggest that the variation in published thermal conductivity values for suspended graphene samples could, at least in part, be due to the presence or absence of wrinkles.

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页数：4

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