Controlled synthesis, growth mechanism, and properties of monodisperse CdS colloidal spheres.
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.
State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, People's Republic of China.
Xin-Hao
XH
Li
Ji-Xue
JX
Li
Guo-Dong
GD
Li
Da-Peng
DP
Liu
Jie-Sheng
JS
Chen
D019187:Cadmium Compounds / Q000138:chemical synthesis* / Q000737:chemistry*; D003102:Colloids; D008855:Microscopy, Electron, Scanning; D049329:Nanostructures / Q000737:chemistry / Q000648:ultrastructure; D010316:Particle Size; D013056:Spectrophotometry, Ultraviolet; D013440:Sulfides / Q000138:chemical synthesis* / Q000737:chemistry*; D013499:Surface Properties
D019187:Cadmium Compounds; D003102:Colloids; D013440:Sulfides; C034939:cadmium sulfide