School of Science, Minzu University of China, Beijing 100081, China.
Langmuir. 2011 Jan 18;27(2):815-9. doi: 10.1021/la103937f. Epub 2010 Dec 20.
We describe a novel route for the conversion of hexagonal Sb(2)Te(3) nanoplates into nanorings driven by growth temperature in a simple solvothermal process. The transmission electron microscopy was employed to investigate systemically the morphology, size, crystallinity, and microstructure of the as-prepared products. The experiments indicated that the growth temperature had a great effect on the morphology of antimony telluride nanostructures. When the experiments were conducted at 200 °C, the hexagonal antimony telluride nanoplates were obtained. However, if the experiments were carried out at higher temperature of 230 °C, the hexagonal antimony telluride nanorings were achieved by dissolution of the inner part with a higher density of defects of the hexagonal nanoplates for the first time. A possible formation mechanism was proposed on the basis of experimental results and analysis. This work may open a new rational route for the synthesis of the hexagonal antimony telluride nanorings, which may have scientific and technological applications in various functional devices.
我们描述了一种通过在简单的溶剂热过程中改变生长温度，将六方 Sb(2)Te(3)纳米板转化为纳米环的新途径。透射电子显微镜被用来系统地研究所制备产物的形态、尺寸、结晶度和微结构。实验表明，生长温度对碲化锑纳米结构的形态有很大的影响。当实验在 200°C 进行时，得到了六方碲化锑纳米板。然而，如果实验在更高的 230°C 温度下进行，则首次通过溶解具有更高密度缺陷的内部分离出六方纳米板，得到了六方碲化锑纳米环。基于实验结果和分析，提出了一种可能的形成机制。这项工作可能为六方碲化锑纳米环的合成开辟了一条新的合理途径，这在各种功能器件中可能具有科学和技术应用。
