Direct Electrodeposition of Highly Dense Bi/Sb Superlattice Nanowire Arrays

Heterostructure formation in one-dimensional nanostructures is equally important for their unique physics properties and has pro-duced much interesting research.1-3 Recently Yang et al.4 developed a hybrid pulsed laser ablation/chemical vapor deposition (PLA-CVD) process for the synthesis of Si/SiGe nanowires with long-itudinally ordered heterostructures. Almost at the same time, Charles M. Lieber et al.5 demonstrate the synthesis of GaAs/GaP superlat-tices by laser-assisted catalytic growth using GaAs and GaP targets. Theoretical study indicated that superlattice nanowires are promising systems for the thermoelectric applications, because this structure is believed to be better in reducing phonon transport and keeping high electron mobility.6,7 Starting from Martin’s pioneer work about template-based methods for the preparation of nano-materials,8 many important thermoelectric materials such as one-dimensional (1D) Bi,Sb nanowires have been synthesized,9 espe