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Steady heat conduction-based thermal conductivity measurement of single walled carbon nanotubes thin film using a micropipette thermal sensor

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6 Author(s)
Shrestha, R. ; Department of Mechanical and Energy Engineering, University of North Texas, Denton, Texas 76203, USA ; Lee, K.M. ; Chang, W.S. ; Kim, D.S.
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In this paper, we describe the thermal conductivity measurement of single-walled carbon nanotubes thin film using a laser point source-based steady state heat conduction method. A high precision micropipette thermal sensor fabricated with a sensing tip size varying from 2 μm to 5 μm and capable of measuring thermal fluctuation with resolution of ±0.01 K was used to measure the temperature gradient across the suspended carbon nanotubes (CNT) film with a thickness of 100 nm. We used a steady heat conduction model to correlate the temperature gradient to the thermal conductivity of the film. We measured the average thermal conductivity of CNT film as 74.3 ± 7.9 W m-1 K-1 at room temperature.

Published in:

Review of Scientific Instruments  (Volume:84 ,  Issue: 3 )

Date of Publication:

Mar 2013

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