Synthesis and Quantum Transport Properties of Bi(2)Se(3) Topological Insulator Nanostructures

Bi(2)Se(3) nanocrystals with various morphologies, including nanotower, nanoplate, nanoflake, nanobeam and nanowire, have been synthesized. Well-distinguished Shubnikov-de Haas (SdH) oscillations were observed in Bi(2)Se(3) nanoplates and nanobeams. Careful analysis of the SdH oscillations suggests the existence of Berry's phase π, which confirms the quantum transport of the surface Dirac fermions in both Bi(2)Se(3) nanoplates and nanobeams without intended doping. The observation of the singular quantum transport of the topological surface states implies that the high-quality Bi(2)Se(3) nanostructures have superiorities for investigating the novel physical properties and developing the potential applications.