0

Full Content is available to subscribers

Subscribe/Learn More  >

Interfacial Thermal Conductance Between Carbon Nanotubes From Nonequilibrium Green’s Function Method

[+] Author Affiliations
Chenhan Liu, Weiyu Chen, Zhiyong Wei, Juekuan Yang, Yunfei Chen

Southeast University, Nanjing, China

Jian Wang

Yangzhou University, Yangzhou, China

Paper No. MNHMT2013-22094, pp. V001T03A004; 6 pages
doi:10.1115/MNHMT2013-22094
From:
  • ASME 2013 4th International Conference on Micro/Nanoscale Heat and Mass Transfer
  • ASME 2013 4th International Conference on Micro/Nanoscale Heat and Mass Transfer
  • Hong Kong, China, December 11–14, 2013
  • Conference Sponsors: Heat Transfer Division
  • ISBN: 978-0-7918-3615-4
  • Copyright © 2013 by ASME

abstract

In this paper, the interfacial thermal conductance between two single-wall carbon nanotubes (SWCNTs) is evaluated using the nonequilibrium Green’s function (NEGF) method. The calculation results show that, for offset parallel contact type, interfacial thermal conductance increases almost linearly with the overlap length. This is because the coupling atom number in overlap region is the main contributor to heat flow through interface. With the same overlap length, interfacial thermal conductance of the nested contact type is much higher than that of the offset parallel contact type. By comparing the phonon transmission function between the two contact types, it is found that the nested contact type has much larger transmission function than the offset parallel contact type due to more atoms involving in the interfacial coupling in the overlap region. By adjusting the chirality of SWCNTs in the offset parallel contact type, it is found that the difference of phonon spectrum can reduce interfacial thermal transfer. We also find the transmission function profiles with only different overlap length are quite similar, that is, changing in the overlap length will not change the phonon transmission probability at the interface. Moreover, acoustic phonon is the main contributor to the interfacial thermal conductance and the radical breathing mode is the vital mode of coupling modes for CNT-CNT system. The calculated results in this paper indicate that increasing the coupling atom number between CNTs would increase the heat energy transfer in CNT-based composites.

Copyright © 2013 by ASME

Figures

Tables

Interactive Graphics

Video

Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In