Solvothermal synthesis and thermoelectric properties of indium telluride nanostring-cluster hierarchical structures

A simple solvothermal approach has been developed to successfully synthesize n-type α-In 2 Te 3 thermoelectric nanomaterials. The nanostring-cluster hierarchical structures were prepared using In(NO 3 ) 3 and Na 2 TeO 3 as the reactants in a mixed solvent of ethylenediamine and ethylene glycol at 20...

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Bibliographic Details
Published in:Nanoscale research letters 2011-04, Vol.6 (1), p.329-329, Article 329
Main Authors: Tai, Guo'an, Miao, Chunyang, Wang, Yubo, Bai, Yunrui, Zhang, Haiqian, Guo, Wanlin
Format: Article
Language:English
Subjects:
Chemistry and Materials Science
Materials Science
Molecular Medicine
Nano Express
Nanochemistry
Nanoscale Science and Technology
Nanotechnology
Nanotechnology and Microengineering
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Summary:A simple solvothermal approach has been developed to successfully synthesize n-type α-In 2 Te 3 thermoelectric nanomaterials. The nanostring-cluster hierarchical structures were prepared using In(NO 3 ) 3 and Na 2 TeO 3 as the reactants in a mixed solvent of ethylenediamine and ethylene glycol at 200°C for 24 h. A diffusion-limited reaction mechanism was proposed to explain the formation of the hierarchical structures. The Seebeck coefficient of the bulk pellet pressed by the obtained samples exhibits 43% enhancement over that of the corresponding thin film at room temperature. The electrical conductivity of the bulk pellet is one to four orders of magnitude higher than that of the corresponding thin film or p-type bulk sample. The synthetic route can be applied to obtain other low-dimensional semiconducting telluride nanostructures. PACS: 65.80.-g, 68.35.bg, 68.35.bt
ISSN:1556-276X
1931-7573
1556-276X
DOI:10.1186/1556-276X-6-329