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Title

Thermal properties of electrodeposited bismuth telluride nanowires embedded in amorphous alumina

AuthorsBorca Tasciuc, Diana-Andra; Chen, G.; Prieto, Amy Lucia; Martín-González, Marisol; Stacy, Angelica; Sands, Timothy; Ryan, M. A.; Fleurial, J. P.
Issue Date13-Dec-2004
PublisherAmerican Institute of Physics
CitationApplied Physics Letters 85(24): 6001 (2004)
AbstractBismuth telluride nanowires are of interest for thermoelectric applications because of the predicted enhancement in the thermoelectric figure-of-merit in nanowire structures. In this letter, we carried out temperature-dependent thermal diffusivity characterization of a 40 nm diameter Bi2Te3 nanowires/alumina nanocomposite. Measured thermal diffusivity of the composite decreases from 9.2×10–7 m2 s–1 at 150 K to 6.9×10–7 m2 s–1 at 300 K and is lower than thermal diffusivity of unfilled alumina templates. Effective medium calculations indicate that the thermal conductivity along nanowires axis is at least an order of magnitude lower than thermal conductivity of the bulk bismuth telluride.
Description3 pages, 3 figures.
Publisher version (URL)http://dx.doi.org/10.1063/1.1834991
URIhttp://hdl.handle.net/10261/21442
DOI10.1063/1.1834991
ISSN0003-6951
Appears in Collections:(IMN-CNM) Artículos




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