Bi₂Te₃/Te superlattice nanowires were synthesized in anodic alumina membranes by annealing Bi-Te alloy nanowires. The morphologies and elements compositions of the superlattice and alloy nanowires were characterized using SEM and TEM, and the results confirmed the atomic ratio (Bi to Te) to be 2:3 and the formation of superlattice structure.