Controlled synthesis, growth mechanism, and properties of monodisperse CdS colloidal spheres.
Controlled synthesis, growth mechanism, and properties of monodisperse CdS colloidal spheres.
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DOI：
10.1002/chem.200700754
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发表时间：
2007-10
期刊：
影响因子：
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通讯作者：
Xinhao Li;Jixue Li;Guodong Li;Da-Peng Liu;Jie‐Sheng Chen
中科院分区：
文献类型：
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作者：
Xinhao Li;Jixue Li;Guodong Li;Da-Peng Liu;Jie‐Sheng Chen
通过简便的溶剂热技术合成了尺寸可控且可调（80 至 500 nm 之间）的高度单分散亚微米 CdS 胶体球 (CSCS)。由于反应过程的可控性，胶体球的生长机制已被详细阐明。整个生长过程可以概括为纳米晶体的均匀且缓慢的成核，通过纳米晶体的3D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表面诱导生长为单分散胶体球。事实证明，所获得的CSCS胶体颗粒能够组装成具有光子晶体特征阻带隙的薄膜。以CSCS为模板，通过离子交换也成功制备了难以直接获得的Ag2S、Bi2S3、Cu2S、HgS和Sb2S3胶体球。
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.