Tao Hong, Shan Xudong, Yu Dapeng, Liu Hongmei, Qin Donghuan, Cao Yong
Nanoscale Res Lett. 2009 May 19;4(9):963-970. doi: 10.1007/s11671-009-9346-2.
We have studied the nucleation and growth of Se-Te nanowires (NWs), with different morphologies, grown by a chemical solution process. Through systematic characterization of the Se-Te NW morphology as a function of the Te nanocrystallines (NCs) precursor, the relative ratio between Se and Te, and the growth time, a number of significant insights into Se-Te NW growth by chemical solution processes have been developed. Specifically, we have found that: (i) the growth of Se-Te NWs can be initiated from either long or short triganol Te nanorods, (ii) the frequency of proximal interactions between nanorod tips and the competition between Se and Te at the end of short Te nanorods results in V-shaped structures of Se-Te NWs, the ratio between Se and Te having great effect on the morphology of Se-Te NWs, (iii) by using long Te nanorods as seeds, Se-Te NWs with straight morphology were obtained. Many of these findings on Se-Te NW growth can be further generalized and provide very useful information for the rational synthesis of group VI based semiconductor NW compounds.
我们研究了通过化学溶液法生长的具有不同形态的硒化碲纳米线（NWs）的成核和生长过程。通过系统地将硒化碲纳米线的形态表征为碲纳米晶体（NCs）前驱体、硒与碲的相对比例以及生长时间的函数，我们对通过化学溶液法生长硒化碲纳米线有了许多重要的认识。具体而言，我们发现：（i）硒化碲纳米线的生长可以从长或短的三角碲纳米棒开始；（ii）纳米棒尖端之间近端相互作用的频率以及短碲纳米棒末端硒与碲之间的竞争导致了硒化碲纳米线的V形结构，硒与碲的比例对硒化碲纳米线的形态有很大影响；（iii）以长碲纳米棒为种子，可以获得形态笔直的硒化碲纳米线。关于硒化碲纳米线生长的许多这些发现可以进一步推广，并为合理合成基于VI族的半导体NW化合物提供非常有用的信息。
