Li Xin-Hao, Li Ji-Xue, Li Guo-Dong, Liu Da-Peng, Chen Jie-Sheng
State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, People's Republic of China.
Chemistry. 2007;13(31):8754-61. doi: 10.1002/chem.200700754.
Highly monodisperse submicrometer CdS colloidal spheres (CSCS) with a controllable and tunable size (between 80 and 500 nm) have been synthesized through a facile solvothermal technique. Owing to the controllability of the reaction process, the growth mechanism of the colloidal spheres has been elucidated in detail. The whole growth process can be summarized as homogenous and slow nucleation of nanocrystals, formation of "cores" through 3D-oriented attachment of nanocrystals, and further surface-induced growth to monodisperse colloidal spheres through in situ formation and random attachment of additional nanocrystals. It has been demonstrated that the obtained CSCS colloidal particles are able to be assembled into films which show characteristic stop band gaps of photonic crystals. By using the CSCS as a template, Ag2S, Bi2S3, Cu2S, HgS, and Sb2S3 colloidal spheres, which are difficult to obtain directly, have also been prepared successfully through ion exchange.
通过一种简便的溶剂热技术合成了具有可控且可调尺寸（80至500纳米之间）的高度单分散亚微米级硫化镉胶体球（CSCS）。由于反应过程的可控性，已详细阐明了胶体球的生长机制。整个生长过程可概括为纳米晶体的均匀缓慢成核、通过纳米晶体的三维定向附着形成“核”，以及通过额外纳米晶体的原位形成和随机附着进一步进行表面诱导生长形成单分散胶体球。已证明所获得的CSCS胶体颗粒能够组装成具有光子晶体特征禁带隙的薄膜。通过使用CSCS作为模板，还成功地通过离子交换制备了难以直接获得的硫化银、硫化铋、硫化铜、硫化汞和硫化锑胶体球。
