Bismuth antimony telluride (BiSbTe) nanowires were electrodeposited at constant potentials into polycarbonate templates from a tartaric-nitric acid electrolyte. Optimum deposition potentials were obtained from polarization and compositional analysis. X-ray diffraction analysis showed a preferential (015) orientation for the nanowires. The Bi2Sb0.6Te3 nanowire sample deposited at -150 mV showed a high Seebeck coefficient (S) of -630 mu V/K. (C) 2010 The Electrochemical Society. [DOI: 10.1149/1.3481712] All rights reserved.