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Open Access Nano Express

Heat Conduction of Air in Nano Spacing

Yao-Zhong Zhang, Bo Zhao, Gai-Yan Huang, Zhi Yang and Ya-Fei Zhang*

Author Affiliations

National Key Laboratory of Nano/Micro Fabrication Technology, Key Laboratory for Thin Film and Microfabrication of the Ministry of Education, Research Institute of Micro/Nano Science and Technology, Shanghai Jiao Tong University, Shanghai, 200240, People’s Republic of China

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Nanoscale Research Letters 2009, 4:850-853  doi:10.1007/s11671-009-9335-5

Published: 6 May 2009


The scale effect of heat conduction of air in nano spacing (NS) is very important for nanodevices to improve their life and efficiency. By constructing a special technique, the changes of heat conduction of air were studied by means of measuring the heat conduction with heat conduction instrument in NS between the hot plate and the cooling plate. Carbon nanotubes were used to produce the nano spacing. The results show that when the spacing is small down to nanometer scale, heat conduction plays a prominent role in NS. It was found that the thickness of air is a non-linear parameter for demarcating the heat conduction of air in NS and the rate of heat conduction in unit area could be regard as a typical parameter for the heat conduction characterization at nanometer scale.

Heat conduction; Air; Nano spacing; Thickness; Rate