Journal
JOURNAL OF PHYSICAL CHEMISTRY B
Volume 111, Issue 7, Pages 1545-1551Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp0672860
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For the application of colloidal crystal films as photonic band gap materials, their domain size and thickness are significant. The substrate withdrawing speed, the colloidal suspension volume fraction, and the colloidal suspension temperature have been studied for the domain size and thickness controls of colloidal crystals in this study. Stable dispersions of monodispersed polystyrene spheres with a diameter of 245 nm were synthesized according to a general emulsion polymerization for colloidal crystal films. By experimental results and the theoretical relationship between the number of layers and other parameters, we could know that the water bridge between colloidal spheres (which is formed by capillary force) influences the number of colloidal crystal layers significantly.
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