Mechanical and thermal transport properties of graphene with defects

被引：339
作者：
Hao, Feng [1 ]
Fang, Daining [1 ,2 ]
Xu, Zhiping [1 ,3 ]
机构：
[1] Tsinghua Univ, Dept Engn Mech, Beijing 100084, Peoples R China
[2] Peking Univ, Coll Engn, Beijing 100871, Peoples R China
[3] Tsinghua Univ, Ctr Nano & Micro Mech, Beijing 100084, Peoples R China
来源：
APPLIED PHYSICS LETTERS | 2011年 / 99卷 / 04期
基金：
美国国家科学基金会;
关键词：
CONDUCTIVITY; OXIDE;
D O I：
10.1063/1.3615290
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The roles of defects including monatomic vacancies and Stone-Wales dislocations in the mechanical and thermal properties of graphene are investigated here through molecular dynamics ( MD) simulations. The results show that Young's modulus of a defected graphene sheet has a gentle dependence with the concentration of defects, while the thermal conductivity is much more sensitive. Analysis based on the effective medium theory (EMT) indicates that this sensitivity originates from the scattering of phonons by defects and delocalized interaction between them, which leads to a transition from propagating to diffusive mode as the concentration increases. (C) 2011 American Institute of Physics. [doi:10.1063/1.3615290]
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页数：3
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