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ACS Appl Mater Interfaces. 2013 Apr 10;5(7):2599-603. doi: 10.1021/am3032772. Epub 2013 Mar 22.

Thermal transfer in graphene-interfaced materials: contact resistance and interface engineering.

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State Key Lab for Turbulence and Complex Systems, College of Engineering, Peking University, Beijing 100871, China.


We investigate here heat transfer across interfaces consisting of single- and few-layer graphene sheets between silicon carbides by performing nonequilibrium molecular dynamics simulations. The interfacial thermal conducitivity κI is calculated by considering graphene layers as an interfacial phase. The results indicate that κI decreases with its thickness and heat flux but increases with the environmental temperature. Interface engineering of κI is explored by intercalating molecules between graphene layers. These guest molecules decouple electronic states across the interface, but tune κI slightly, leading to a thermally transparent but electronically insulating interface. These results provide a fundamental understanding in thermal transport across weakly bound interfaces, and design recipes for multifunctional thermal interface materials, composites and thermal management in graphene-based devices.

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