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Thermal Characterization of Nanowire Array in a-Al2O3 Matrix

Published online by Cambridge University Press:  15 March 2011

Diana-Andra Borca-Tasciuc ,
Gang Chen ,
Yu-Ming Lin ,
Oded Rabin ,
Mildred S. Dresselhaus ,
Alexander Borshchevsky ,
Jean-Pierre Fleurial  and
Margaret A. Ryan
Diana-Andra Borca-Tasciuc
Affiliation:
Mechanical Engineering Department, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
Gang Chen
Affiliation:
Mechanical Engineering Department, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
Yu-Ming Lin
Affiliation:
Physics Department, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
Oded Rabin
Affiliation:
Physics Department, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
Mildred S. Dresselhaus
Affiliation:
Physics Department, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Electrical Engineering Department, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
Alexander Borshchevsky
Affiliation:
Jet Propulsion Laboratory/California Institute of Technology, 4800 Oak Grove Drive, MS 277-207, Pasadena, CA 91109, USA
Jean-Pierre Fleurial
Affiliation:
Jet Propulsion Laboratory/California Institute of Technology, 4800 Oak Grove Drive, MS 277-207, Pasadena, CA 91109, USA
Margaret A. Ryan
Affiliation:
Jet Propulsion Laboratory/California Institute of Technology, 4800 Oak Grove Drive, MS 277-207, Pasadena, CA 91109, USA
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Abstract

Thermal properties characterization of Bi nanowires is critical in order to validate the predicted enhancement of their thermoelectric figure-of-merit. In this paper we report the effective thermal diffusivity of Bi nanowires array embedded in a-Al2O3 (alumina) template. The composite material consists of 85% alumina and approximately 15% Bi nanowires with a diameter of 40 nm and an average length of 40 [.proportional]m. Measurements are performed along the nanowire axis. A thermal wave is produced at the front side of the sample and it is monitored at the backside through a fast thermoelectric effect. A one-dimensional heat conduction model is used to extract the thermal diffusivity.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 703: Symposia U/V – Nanophase and Nanocomposite Materials IV , 2001 , V2.7
Copyright
Copyright © Materials Research Society 2002

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References

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