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Direct Study of the Thermal Conductivity in Aluminum Nanowires

Published online by Cambridge University Press:  31 January 2011

Nenad Stojanovic ,
D.H.S. Maithripala ,
Jordan M. Berg  and
Mark Holtz
Nenad Stojanovic
Affiliation:
nenad.stojanovic@ttu.edu, Texas Tech University, Nano Tech Center, Lubbock, Texas, United States
D.H.S. Maithripala
Affiliation:
mugalan@gmail.com, University of Peradeniya, Peradeniya, Sri Lanka
Jordan M. Berg
Affiliation:
jordan.berg@ttu.edu, Texas Tech University, Nano Tech Center, Lubbock, Texas, United States
Mark Holtz
Affiliation:
MARK.HOLTZ@ttu.edu, Texas Tech University, Nano Tech Center, Lubbock, Texas, United States
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Abstract

Thermal conductivity and electrical resistivity of 1 μm long aluminum nanowires, 75, 100, and 150nm in width and 100nm thick, were measured at room temperature. The method consists of microfabricated electrothermal test devices and a model-based data processing approach using finite-element analysis (FEA). The electrical and thermal properties of the nanowires differ significantly from bulk values while electrical resistivity agrees well with theoretical prediction. Electron transport equation models, which adequately describe the resistivity data, consistently underestimate the thermal conductivity. Incorporating a phonon contribution of ˜ 21 W/m·K to the total thermal conductivity is found to accurately describe the measured values.

Keywords

nanoscalethermal conductivityAl
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1221: Symposium CC – Phonon Engineering for Enhanced Materials Solutions–Theory and Applications , 2009 , 1221-CC03-03
Copyright
Copyright © Materials Research Society 2010

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