Effect of vacancy defects on thermal conductivity of single-walled carbon nanotubes

Author

Kai Tang ; Fulong Zhu ; Youkai Chen ; Ying Li ; Hengyou Liao ; Xiahui Chen ; Sheng Liu

Author_Institution

State Key Lab. for Digital Manuf. Equip. & Technol., Huazhong Univ. of Sci. & Technol., Wuhan, China

fYear

2013

fDate

11-13 Dec. 2013

Firstpage

817

Lastpage

820

Abstract

The existence of structure defects can be influence to properties of carbon nanotubes (CNTs). Effect of vacancy defects on heat conduction in CNTs is revealed by nonequilibrium molecular dynamics (NEMD) simulations. The thermal conductivity of (6,6) single-walled carbon nanotubes (SWCNTs) with various numbers of vacancy defects is investigated in this work. It is demonstrated that the thermal conductivity of SWCNTs with vacancies is lower than that of perfect SWCNTs. Thermal conductivity of SWCNTs deceases with increasing concentration of vacancy defects, it is noted that thermal conductivity of SWCNTs can be a 45% decreases with 0.16% vacancy defects at 300K. It is also illustrated that the thermal conductivity of SWCNTs decreases with the increasing temperature.

Keywords

carbon nanotubes; molecular dynamics method; thermal conductivity; vacancies (crystal); CNTs; NEMD; heat conduction; nonequilibrium molecular dynamic simulation; single-walled carbon nanotubes; structure defects; temperature 300 K; thermal conductivity; vacancy defect concentration; vacancy defect effect; Carbon nanotubes; Conductivity; Electron tubes; Heating; Phonons; Temperature distribution; Thermal conductivity;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronics Packaging Technology Conference (EPTC 2013), 2013 IEEE 15th

Conference_Location

Singapore

Print_ISBN

978-1-4799-2832-3

Type

conf

DOI

10.1109/EPTC.2013.6745835

Filename

6745835