Comparison of isotope effects on thermal conductivity of graphene nanoribbons and carbon nanotubes

被引：68
|
作者：
Li, Xiuqiang [1 ,2 ]
Chen, Jie [3 ,4 ]
Yu, Chenxi [1 ,2 ]
Zhang, Gang [1 ,2 ,5 ]
机构：
[1] Peking Univ, Key Lab Phys & Chem Nanodevices, Beijing 100871, Peoples R China
[2] Peking Univ, Dept Elect, Beijing 100871, Peoples R China
[3] Natl Univ Singapore, Ctr Computat Sci & Engn, Dept Phys, Singapore 117542, Singapore
[4] Natl Univ Singapore, Graphene Res Ctr, Singapore 117542, Singapore
[5] Inst High Performance Comp, Singapore 138632, Singapore
来源：
APPLIED PHYSICS LETTERS | 2013年 / 103卷 / 01期
基金：
中国国家自然科学基金;
关键词：
FEW-LAYER GRAPHENE; MOLECULAR-DYNAMICS; SUPPORTED GRAPHENE; SIZE DEPENDENCE; RECTIFICATION; TEMPERATURE; REDUCTION; RECTIFIER; TRANSPORT;
D O I：
10.1063/1.4813111
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
By using molecular dynamics simulation, we explore the isotope effect on thermal conductivity of graphene nanoribbons (GNRs) and carbon nanotubes (CNTs). For both GNRs and CNTs, the lattice thermal conductivity decreases when isotope concentration increases from 0% to 30%. The thermal conductivity reduction ratio in GNRs is less than that in CNTs. For example, thermal conductivity of CNT with 5% C-13 concentration is 25% lower than that of pure CNTs; however, the reduction in thermal conductivity of GNRs with the same isotope concentration is only about 12%. Lattice dynamics analysis reveals that these phenomena are related to the phonon localization. (C) 2013 AIP Publishing LLC.
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页数：5
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