Rational design of Bi2Te3 polycrystalline whiskers for thermoelectric applications
Article
Article Title | Rational design of Bi2Te3 polycrystalline whiskers for thermoelectric applications |
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ERA Journal ID | 40638 |
Article Category | Article |
Authors | Han, Guang (Author), Chen, Zhi Gang (Author), Yang, Lei (Author), Hong, Min (Author), Drennan, John (Author) and Zou, Jin (Author) |
Journal Title | ACS Applied Materials and Interfaces |
Journal Citation | 7 (1), pp. 989-995 |
Number of Pages | 7 |
Year | 2015 |
Publisher | American Chemical Society |
Place of Publication | United States |
ISSN | 1944-8244 |
1944-8252 | |
Digital Object Identifier (DOI) | https://doi.org/10.1021/am5078528 |
Web Address (URL) | http://pubs.acs.org/doi/abs/10.1021/am5078528 |
Abstract | Bi2Te3 polycrystalline whiskers consisting of interconnected nanoplates have been synthesized through chemical transformation from In2Te3 polycrystalline whisker templates assembled by nanoparticles. The synthesized Bi2Te3 whiskers preserve the original one-dimensional morphology of the In2Te3, while the In2Te3 nanoparticles can be transformed into the Bi2Te3 thin nanoplates, accompanied by the formation of high-density interfaces between nanoplates. The hot-pressed nanostructures consolidated from Bi2Te3 polycrystalline whiskers at 400 °C demonstrate a promising figure of merit (ZT) of 0.71 at 400 K, which can be attributed to their low thermal conductivity and relatively high electrical conductivity. The small nanoparticles inherited from the polycrystalline whiskers and high-density nanoparticle interfaces in the hot-pressed nanostructures contribute to the significant reduction of thermal conductivity. This study provides a rational chemical transformation approach to design and synthesize polycrystalline microstructures for enhanced thermoelectric performances. |
Keywords | Bi2Te3; chemical transformation; In2Te3; interface; polycrystalline whisker; thermoelectric; chemical transformations; high electrical conductivity; one-dimensional morphologies; polycrystalline; polycrystalline microstructure; reduction of thermal conductivity; thermoelectric application; Others, incl. Bismuth, Boron, Cadmium, Cobalt, Mercury, Niobium, Selenium, Silicon, Tellurium; thermoelectric energy; |
ANZSRC Field of Research 2020 | 400499. Chemical engineering not elsewhere classified |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | University of Queensland |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q4160/rational-design-of-bi2te3-polycrystalline-whiskers-for-thermoelectric-applications
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