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Thermal conductance imaging of graphene contacts

Authors :
Elbara Ziade
Jia Yang
Matteo Chiesa
Alexander Schmidt
Marco Stefancich
Carlo Maragliano
Anna K. Swan
Xuanye Wang
Robert Crowder
Source :
Journal of Applied Physics. 116:023515
Publication Year :
2014
Publisher :
AIP Publishing, 2014.

Abstract

Suspended graphene has the highest measured thermal conductivity of any material at room temperature. However, when graphene is supported by a substrate or encased between two materials, basal-plane heat transfer is suppressed by phonon interactions at the interfaces. We have used frequency domain thermoreflectance to create thermal conductance maps of graphene contacts, obtaining simultaneous measurements of the basal-plane thermal conductivity and cross-plane thermal boundary conductance for 1–7 graphitic layers encased between titanium and silicon dioxide. We find that the basal-plane thermal conductivity is similar to that of graphene supported on silicon dioxide. Our results have implications for heat transfer in two-dimensional material systems, and are relevant for applications such as graphene transistors and other nanoelectronic devices.

Details

ISSN :
10897550 and 00218979
Volume :
116
Database :
OpenAIRE
Journal :
Journal of Applied Physics
Accession number :
edsair.doi...........0d8e12d4d83dff26f6bf38dbef8361e7