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Journal of Nanomaterials
Volume 2013, Article ID 635647, 6 pages
http://dx.doi.org/10.1155/2013/635647
Research Article

Fabrication of Metal Alloy-Deposited Flexible MWCNT Buckypaper for Thermoelectric Applications

1Department of Electrical Engineering, Tunghai University, 181 Taichung Harbor Road, Section 3, Taichung 40704, Taiwan
2Tunghai Green Energy Development and Management Institute, Tunghai University, 181 Taichung Harbor Road, Section 3, Taichung 40704, Taiwan
3Department of Industrial Engineering and Enterprise Information, Tunghai University, 181 Taichung Harbor Road, Section 3, Taichung 40704, Taiwan

Received 31 March 2013; Revised 10 September 2013; Accepted 27 September 2013

Academic Editor: Sulin Zhang

Copyright © 2013 Jih-Hsin Liu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We report the fabrication of a flexible network of multiwall carbon nanotubes (MWCNTs) known as buckypaper (BP) for thermoelectric (TE) applications. A thermal evaporation method was used to deposit TE metal alloys onto the BP. The TE properties were improved primarily by increasing the Seebeck coefficient values (50 and 75 μV/K) and the electrical conductivity by approximately 10 000 S/m. High-temperature resistivity studies were performed to confirm the semiconductivity of buckypaper. Variations in resistivity were observed to be the result of the metal alloys coated on the BP surface. We also demonstrated that a substantial increase in the Seebeck coefficient values can be obtained by connecting 3 and 5 layers of metal-deposited BP in series, thereby enhancing the TE efficiency of MWCNT-based BP for application in thermoelectric devices.