Zhang Hua, Zuo Ming, Tan Shun, Li Gongpu, Zhang Shuyuan, Hou Jianguo
Structure Research Laboratory, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China.
J Phys Chem B. 2005 Jun 2;109(21):10653-7. doi: 10.1021/jp044152i.
A simple and practical carbothermal chemical vapor deposition route has been developed for the growth of trigonal phase selenium nanowires and nanoribbons. In detail, the mixture of active carbon and selenium was heated for the chemical reaction to occur, followed by thermal evaporation and decomposition into elemental selenium. The as-prepared sample was characterized by X-ray diffraction, transmission electron microscopy, high-resolution electron microscopy, UV-vis absorption, and photoluminescence. The results show that trigonal Se nanowires have uniform diameters ranging from 20 to 60 nm and grow along the [001] direction, with the same growth direction found for nanoribbons. Spectral measurements suggest a large blue shift and two types of electron transition activity. The influences of experimental conditions on morphologies and growth processes are also discussed. This synthetic method should be able to be extended to grow other one-dimensional chalcogens and chalcogenides nanostructures.
已开发出一种简单实用的碳热化学气相沉积方法来生长三角相硒纳米线和纳米带。具体而言，将活性炭和硒的混合物加热以使化学反应发生，随后热蒸发并分解为元素硒。通过X射线衍射、透射电子显微镜、高分辨率电子显微镜、紫外可见吸收和光致发光对所制备的样品进行了表征。结果表明，三角相硒纳米线直径均匀，范围为20至60纳米，沿[001]方向生长，纳米带也具有相同的生长方向。光谱测量表明有较大的蓝移和两种类型的电子跃迁活性。还讨论了实验条件对形貌和生长过程的影响。这种合成方法应该能够扩展到生长其他一维硫族元素和硫族化合物纳米结构。
