Nanoscale heat transfer at contact between a hot tip and a substrate

Details Nanoscale heat transfer at contact between a hot tip and a substrate Nanoscale heat transfer at contact between a hot tip and a substrate

2008-02-14

arxiv.org/abs/0802.2086v1

International Journal of Heat and Mass Transfer 49, 1-2 (2006) 251-258

Physics

Condensed Matter

Materials Science

Scientific paper

10.1016/j.ijheatmasstransfer.200

Hot tips are used either for characterizing nanostructures by using scanning thermal microscopes or for local heating to assist data writing. The tip-sample thermal interaction involves conduction at solid-solid contact as well as conduction through the ambient gas and through the water meniscus. We analyze those three heat transfer modes with experimental data and modeling. We conclude that the three modes contribute in a similar manner to the thermal contact conductance but they have distinct contact radii ranging from 30 nm to 1 micron. We also show that any scanning thermal microscope has a 1-3 microns resolution when used in ambient air.

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