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Effects of surface metal layer on the thermal contact resistance of carbon nanotube arrays

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4 Author(s)
Wu, Y. ; Tsinghua-Foxconn Nanotechnology Research Center, and Department of Physics, Tsinghua University, Beijing 100084, People’s Republic of China ; Liu, C.H. ; Huang, H. ; Fan, S.S.

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We present a type of thermal interface material by incorporating carbon nanotube arrays into polydimethylsiloxane. Particularly, we evaporated a 1-μm-thick aluminum layer on the top of the raw carbon nanotube array, which served as a heat current collector to decrease the thermal contact resistance. The thermal conductivity and thermal contact resistance of the materials were measured by the steady-state method. Comparing to the material without the heat current collector, the thermal contact resistance was remarkably reduced by about 50%.

Published in:

Applied Physics Letters  (Volume:87 ,  Issue: 21 )