Two-step vapor transport deposition of large-size bridge-like Bi2Se3 nanostructures

Abstract

In this paper, single crystalline Bi₂Se₃ nanostructures including nanowires, nanoribbons, nanoplates and bridge-like nanostructures have been grown by physical vapor deposition. By investigating the morphological evolution of the Bi₂Se₃ nanostructures, we found that Bi₂Se₃ nanoribbons with the long axis along <110> could facilitate the formation of bridge-like nanostructures. Subsequently, a two-step growth process had been developed to increase both the size and the amount of the bridge-like Bi₂Se₃ nanostructures effectively, which shows great promise to realize the growth of large-size two-dimensional materials for various optoelectronic and spintronic applications.