Thermal conductivity of graphene kirigami: Ultralow and strain robustness

Wei, N, Chen, Y, Cai, K, Zhao, J, Wang, H and Zheng, J 2016, 'Thermal conductivity of graphene kirigami: Ultralow and strain robustness', Carbon, vol. 104, pp. 203-213.


Document type: Journal Article
Collection: Journal Articles

Title Thermal conductivity of graphene kirigami: Ultralow and strain robustness
Author(s) Wei, N
Chen, Y
Cai, K
Zhao, J
Wang, H
Zheng, J
Year 2016
Journal name Carbon
Volume number 104
Start page 203
End page 213
Total pages 11
Publisher Pergamon Press
Abstract Kirigami structure, from the macro- to the nanoscale, exhibits distinct and tunable properties from original two-dimensional sheet by tailoring the original two-dimensional sheet. In the present work, the extreme reduction of the thermal conductivity by tailoring sizes in graphene nanoribbon kirigami (GNR-k) is demonstrated using nonequilibrium molecular dynamics simulations. The results show that the thermal conductivity of GNR-k (around 5.1 W m-1K-1) is around two orders of magnitude lower than that of the pristine graphene nanoribbon (GNR) (around 151.6 W m-1K-1), while the minimum value is expected to be up to zero in extreme case from our theoretical model. The further study of the micro-heat flux on each atom of GNR-k shows the reduction of the thermal conductivity from three main sources: the elongation of real heat flux path, the overestimation of real heat flux area and the phonon scattering at the vacancy of the edge. In particular, the strain engineering effect on the thermal conductivity of GNR-k and a thermal robustness property has been investigated. Our results provide physical insights into the origins of the ultralow and robust thermal conductivity of GNR-k, which also suggests that the GNR-k can be used for nanoscale heat management and thermoelectric application.
Subject Nanomaterials
DOI - identifier 10.1016/j.carbon.2016.03.043
Copyright notice © 2016 Elsevier
ISSN 0008-6223
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 29 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 0 times in Scopus Article
Altmetric details:
Access Statistics: 7 Abstract Views  -  Detailed Statistics
Created: Mon, 29 Apr 2019, 13:04:00 EST by Catalyst Administrator
© 2014 RMIT Research Repository • Powered by Fez SoftwareContact us