colloidal silica
7.Two-dimension films of 1002 nm polystyrene (PS) colloidal particles and 413 nm silica (SiO2) colloidal particles were rapidly synthesized by spin-coating, the colloidal particles came into being ordered array. And then double layers and different colloidal particles films were obtained by spin-coating SiO2 particles on particle-template of PS monolayer film, SiO2 formed several array modes of LS, LS2, LS3.
8.Such characters provide the opportunities to shape and mould the flow of light for photoelectric communication technology and photonic computer in the future. In this thesis, the fabrication and character of the silica or polystyrene opal colloidal crystals and CdS as well as barium titanate/titania composite inverted opal structure photonic crystals are presented, and then we discuss the mechanism and the use of the colloidal crystals’ structural color.

