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Thermal resistance of the native interface between vertically aligned multiwalled carbon nanotube arrays and their SiO2/Si substrate

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5 Author(s)
Son, Youngsuk ; Department of Mechanical, Aerospace and Nuclear Engineering, Rensselaer Polytechnic Institute, 110 8th St., Troy, New York 12180-3590, USA ; Pal, Sunil K. ; Borca-Tasciuc, T. ; Ajayan, P.M.
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The interface thermal resistance (ITR) of the native interface between vertically aligned multiwalled carbon nanotube arrays and the SiO2/Si substrate was investigated. Experimental results obtained by a photothermoelectric technique are compared with theoretical predictions for the ITR across nanoconstrictions. The model considers classical constriction effects and contributions due to diffuse mismatch thermal resistance. Experimental values of the ITR are much larger than the model predictions. The observed discrepancy may be due to the imperfect mechanical contact between the tubes and substrate or additional contributions to the ITR due to the presence of a catalyst layer at the interface.

Published in:

Journal of Applied Physics  (Volume:103 ,  Issue: 2 )

Date of Publication:

Jan 2008

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