Manipulating Growth of Thermoelectric Bi₂Te₃/Sb Multilayered Nanowire Arrays

High-density thermoelectric Bi 2 Te 3 /Sb multilayered nanowire arrays with a minimum period of 10 nm are successfully fabricated by a template-assisted pulsed electrodeposition process based on the deep investigation of Bi−Sb−Te electrolyte solution. Large-scale, solid, and continuous nanowire arrays with multisegment characters and uniform diameters can be observed by FE-SEM and TEM, and the randomly selected neighboring segments were characterized to be Bi 2 Te 3 and Sb, respectively, by SAED and EDS. It is demonstrated that the segment length and length ratios can be effectively tuned by manipulating the deposition time, which presents good candidates for further thermoelectric applications.