A New Strategy for Realizing the Conversion of "Homo–Hetero–Homo" Heteroepitaxial Growth in Bi2Te3 and the Thermoelectric Performance. Issue 19 (2nd April 2014)

• Record Type: Journal Article
• Authors: Guo, Wei; Ma, Jianmin; Yang, Jiaqin; Li, Di; Qin, Qing; Wei, Caiying; Zheng, Wenjun
• Is Part Of: Chemistry. Volume 20:Issue 19(2014)
• Page Start: 5657
• Page End: 5664
• Publication Date: 2014-04-02
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.201304436
• Languages: English
• ISSNs: 0947-6539

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>Uncovering the reason for structure‐dependent thermoelectric performance still remains a big challenge. A low‐temperature and easily scalable strategy for synthesizing Bi₂Te₃ nanostring hierarchical structures through solution‐phase reactions, during which there is the conversion of "homo–hetero–homo" in Bi₂Te₃ heteroepitaxial growth, is reported. Bi₂Te₃ nanostrings are obtained through the transformation from pure Bi₂Te₃ hexagonal nanosheets followed by TeBi₂Te₃ "nanotop" heterostructures to Bi₂Te₃ nanostrings. The growth of Bi₂Te₃ nanostrings appears to be a self‐assembly process through a wavy competition process generated from Te and Bi³⁺. The conversion of homo–hetero–homo opens up new platforms to investigate the wet chemistry of Bi₂Te₃ nanomaterials. Furthermore, to study the effect of morphologies and hetero/homo structures, especially with the same origin and uniform conditions on their thermoelectric properties, the thermoelectric properties of Bi₂Te₃ nanostrings and TeBi₂Te₃ heterostructured pellets fabricated by spark plasma sintering have been investigated separately.</p> </abstract>