writer：Zhaoping Liu, Shu Li, You Yang, Zhaokang Hu, Sheng Peng, Jianbo Liang, Yitai Qian*
keywords：nanostructures, tellurium, hydrothermal
source：期刊
specific source：New J. Chem. 2003, 27, 1748-1752.
Issue time：2003年

Single crystalline one-dimensional (1D) nanostructures of trigonal tellurium (t-Te) with well-controlled shapes and sizes were synthesized by the hydrothermal reduction of Na₂TeO₃ in a mixed solution of ethanol and water at 100°C. The formation of various 1D nanostructures of t-Te was mainly determined by properly controlling the nucleation and growth rate of t-Te in different reaction media. In acidic solution (1 M of HCl), the reaction gave nanowires with diameters of 30–100 nm, while in alkaline solution (1 M of NaOH), it yielded tubular crystals with diameters of 1–2 μm. The diameters of tubular crystals could also be controlled by adjusting the NaOH concentration. When polymer surfactant poly(vinyl pyrrolidone) (PVP) was presented in the alkaline solution, the reaction would produce uniform nanowires with diameters of 25 nm. Based on the TEM and SEM studies, the formation mechanisms for these 1D nanostructures were rationally interpreted. The crystallinity of the nanowires and the tubular crystals were determined by HRTEM, ED, and XRD.