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Template-Free Bipotentiostatic Deposition of Thermoelectric BixTey Nano Arrays
School of Chemistry, the University of New South Wales, Sydney, Australia
State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing, China
School of Chemistry, the University of New South Wales, Sydney, Australia
State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing, China
- 1 School of Chemistry, the University of New South Wales, Sydney, Australia
- 2 State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing, China
- 3 School of Chemistry, the University of New South Wales, Sydney, Australia
- 4 State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing, China
Journal of Materials Science and Chemical Engineering·Volume 05 (2017)·Pages 1–7·Published 4 January 2017·DOI10.4236/msce.2017.51001
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Abstract
Monodispersed Bi-Tenano arrays are achieved via template-free bipotentiostatic deposition. The diameter and length of individual nanorod is ~80 nm and ~250 nm respectively. The electrodeposition process is demonstrated to follow a two-step mechanism: an instantaneous reductive potential is applied to form dispersive nuclei, then a reverse oxidative potential strips partial Bi atoms to prevent further cross-growth. Repeatedly, the nano arrays film is obtained eventually. The thermoelectric properties of the obtained Bi-Tenano arrays such as electrical resistance, carrier density, Seebeck coefficient and power factor are measured to be 2.438 × 10 -4 Ω · m, 4.251 × 1020 cm-3, -25.892 μV · K-1, 2.750 × 10-6 W · m-1 · K2, respectively.
KeywordsThermoelectric MaterialsBismuth TellurideNano ArraysTemplate-FreeElectrodeposition
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