Jiang Li-Ping, Xu Shu, Miao Jian-Jun, Wang Hui, Zhu Jun-Jie
Key Lab of the Life Analytical Chemistry, School of the Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, PR China.
J Nanosci Nanotechnol. 2006 Aug;6(8):2584-7. doi: 10.1166/jnn.2006.546.
A convenient sonochemical route was developed to fabricate one-dimensional (1D) CdS or CdSe assemblies via a simple template method with two-steps: Firstly, the colloid one dimensional cadmium hydroxide particles were prepared as templates under sonication; then, the colloid particles were converted into 1D CdS or CdSe assemblies via a replacement reaction after the surface nucleation and crystal growth processes. The as-prepared CdS and CdSe nanowires were characterized by XRD, TEM, XPS, and UV-visible Spectroscopy. The effects of the ultrasonic irradiation were discussed. It is believed that the ultrasound irradiation played a positive role in both the assembly of the colloid cadmium hydroxide particles into the 1D structure and the growth of CdSe and CdS nanowires. The effects of pH on the morphologies of the cadmium hydroxide template were also discussed. The band gaps of the as-prepared 1D CdSe and CdS assemblies were calculated to be 3.1 eV and 4.9 eV, respectively, indicating the quantum size effect. The as-prepared products might have potential applications in nanodevices in future.
通过一种简便的两步模板法，开发了一种便捷的声化学路线来制备一维（1D）硫化镉（CdS）或硒化镉（CdSe）组件：首先，在超声作用下制备胶体一维氢氧化镉颗粒作为模板；然后，在表面成核和晶体生长过程之后，通过置换反应将胶体颗粒转化为一维CdS或CdSe组件。通过X射线衍射（XRD）、透射电子显微镜（TEM）、X射线光电子能谱（XPS）和紫外可见光谱对所制备的CdS和CdSe纳米线进行了表征。讨论了超声辐照的影响。据信，超声辐照在将胶体氢氧化镉颗粒组装成一维结构以及CdSe和CdS纳米线的生长过程中都起到了积极作用。还讨论了pH值对氢氧化镉模板形貌的影响。所制备的一维CdSe和CdS组件的带隙经计算分别为3.1电子伏特和4.9电子伏特，表明存在量子尺寸效应。所制备的产物未来可能在纳米器件中具有潜在应用。
