TITLE:
Template-Free Bipotentiostatic Deposition of Thermoelectric BixTey Nano Arrays
AUTHORS:
Xin Bo, Feng Wang, Chuan Zhao
KEYWORDS:
Thermoelectric Materials, Bismuth Telluride, Nano Arrays, Template-Free, Electrodeposition
JOURNAL NAME:
Journal of Materials Science and Chemical Engineering,
Vol.5 No.1,
January
4,
2017
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 × 10-4Ω·m, 4.251 × 1020 cm-3, -25.892 μV·K-1, 2.750 × 10-6 W·m-1·K2, respectively.