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Proceedings Paper

Measurements of thermal conductivity of La0.95Sr0.05CoO3 nanofibers using MEMS devices
Author(s): Weihe Xu; Hamid Hadim; Yong S. Chu; Yong Shi; Evgeny Nazaretski
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Paper Abstract

Thermoelectric oxide nanofibers prepared by electrospinning are expected to have reduced thermal conductivity when compared to bulk samples. Measurements of nanofibers’ thermal conductivity is challenging since it involves sophisticated sample preparation methods. In this work, we present a novel method suitable for measurements of thermal conductivity in a single nanofiber. A microelectro-mechanical (MEMS) device has been designed and fabricated to perform thermal conductivity measurements on a single nanofiber. A special Si template was designed to collect and transfer individual nanofibers onto a MEMS device. Pt was deposited by Focused Ion Beam to reduce the effective length of a prepared nanofiber. A single La0.95Sr0.05CoO3 nanofiber with a diameter of 140 nm was studied and characterized using this approach. Measured thermal conductivity of a nanofiber was determined to be 0.7 W/m•K, which is 23% of the value reported for bulk La0.95Sr0.05CoO3 samples.

Paper Details

Date Published: 7 March 2014
PDF: 6 pages
Proc. SPIE 8975, Reliability, Packaging, Testing, and Characterization of MOEMS/MEMS, Nanodevices, and Nanomaterials XIII, 89750D (7 March 2014); doi: 10.1117/12.2054464
Show Author Affiliations
Weihe Xu, Brookhaven National Lab. (United States)
Stevens Institute of Technology (United States)
Hamid Hadim, Stevens Institute of Technology (United States)
Yong S. Chu, Brookhaven National Lab. (United States)
Yong Shi, Stevens Institute of Technology (United States)
Evgeny Nazaretski, Brookhaven National Lab. (United States)


Published in SPIE Proceedings Vol. 8975:
Reliability, Packaging, Testing, and Characterization of MOEMS/MEMS, Nanodevices, and Nanomaterials XIII
Herbert R. Shea; Rajeshuni Ramesham, Editor(s)

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