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1Silica photonic crystals with quasi-full band gap in the visible region prepared in ethanol显示文摘Monodisperse silica spheres of 252 nm with a standard deviation of 5.7% are prepared by Stber method. By comparison of both of media, ethanol instead of water is used to assemble opal, and the artificial opal has been prepared by the sedimentation in ethanol of silica spheres. The structure of the opal prepared has been examined and discussed. The results show that the artificial opal has a structure similar to the face-centered cubic (fcc) type packed system with silica spheres. Transmission measurements of the artificial opal have been conducted, which shows that the artificial opal is quasi-full band gap silica photonic crystals in the visible region.ZHANGHui WANGXidong ZHAOXiaofeng LlWenchao TANGQing 2003Progress in Natural Science:Materials International2003,13,9:1
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