Experimentally understanding the heat transfer in graphene (sheets of graphite a few atoms thick) is important for fundamental physics as well as device applications. In particular, measurements of the heat flow through graphene encased by oxide layers are essential for future graphene-based nanoelectronics, interconnects, and thermal management structures. Here we use a “heat spreader method” to study the heat dissipation performance of encased graphene. Measurements show enhanced heat spreading by a graphene layer as compared to control samples without graphene. At room temperature, the in-plane thermal conductivity of encased graphene sheets of thickness 2 nm and 5 nm is measured to be ∼150 W/m-K, more than one order of magnitude smaller than a published report for a freely-suspended graphene sheet [A. A. Balandin et al., Nano Lett. 8, 902], as well as bulk graphite. We also used a differential 3ω method to measure the thermal contact resistance between graphene and SiO2, finding a value around 10−8 m2-K/W at room temperature. Possible reasons for the unexpectedly low thermal conductivity are also discussed.
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ASME 2009 Heat Transfer Summer Conference collocated with the InterPACK09 and 3rd Energy Sustainability Conferences
July 19–23, 2009
San Francisco, California, USA
Conference Sponsors:
- Heat Transfer Division
ISBN:
978-0-7918-4357-4
PROCEEDINGS PAPER
Heat Transfer in Encased Graphene
Zhen Chen,
Zhen Chen
University of California, Riverside, Riverside, CA
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Wanyoung Jang,
Wanyoung Jang
University of California, Riverside, Riverside, CA
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Wenzhong Bao,
Wenzhong Bao
University of California, Riverside, Riverside, CA
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Chun Ning Lau,
Chun Ning Lau
University of California, Riverside, Riverside, CA
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Chris Dames
Chris Dames
University of California, Riverside, Riverside, CA
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Zhen Chen
University of California, Riverside, Riverside, CA
Wanyoung Jang
University of California, Riverside, Riverside, CA
Wenzhong Bao
University of California, Riverside, Riverside, CA
Chun Ning Lau
University of California, Riverside, Riverside, CA
Chris Dames
University of California, Riverside, Riverside, CA
Paper No:
HT2009-88370, pp. 241-247; 7 pages
Published Online:
March 12, 2010
Citation
Chen, Z, Jang, W, Bao, W, Lau, CN, & Dames, C. "Heat Transfer in Encased Graphene." Proceedings of the ASME 2009 Heat Transfer Summer Conference collocated with the InterPACK09 and 3rd Energy Sustainability Conferences. Volume 2: Theory and Fundamental Research; Aerospace Heat Transfer; Gas Turbine Heat Transfer; Computational Heat Transfer. San Francisco, California, USA. July 19–23, 2009. pp. 241-247. ASME. https://doi.org/10.1115/HT2009-88370
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