Preparation of single crystal triangular selenium nanostructures and photoelectric properties

Abstract

Anisotropic growth of selenium leads to formation of one-dimensional structure of selenium, and reaction conditions mostly determine the morphology of products. In this study, one-dimensional selenium materials were prepared directly from selenium powder by microwave-assisted method. Selenium nanotubes and selenium nanorods were synthesized by adjusting the ratio of ethylene glycol to water. The as-prepared products were characterized by Transmission Electron Microscope (TEM), Selected area electron diffraction (SAED), X-ray diffraction (XRD), Raman spectroscopy, photoluminescence spectroscopy and UV-Vis absorption spectroscopy, and their electrical properties were also tested. Results from High Resolution Transmission Electron Microscope (HRTEM), SAED and XRD patterns showed that the prepared selenium nanotubes had good single crystal microstructure, and its possible growth direction of t-se nanotubes was 001. The selenium nanotubes had strong light response compared with dark condition under 650 nm laser irradiation. We hope that the selenium nanotubes will have a better development prospect in the direction of semiconductor devices.