中文摘要：

以自组装法制备的面心立方结构的聚甲基丙烯酸甲酯（PMMA）蛋白石为模板,采用溶胶凝胶法制备二氧化铈（CeO2）掺杂铕离子（Eu^3＋）的反蛋白石结构光子晶体.利用XRD,SEM,UV-Vis等测量手段研究了光子禁带特性,样品在低温下的发光特性也被研究.结果表明CeO2：Eu^3＋反蛋白石的光子禁带是413nm,PMMA蛋白石的光子禁带是612nm,与理论计算结果十分吻合.且随着温度的降低,Eu^3＋离子所处晶体场的对称性下降.

英文摘要：

The polymethyl methacrylate（PMMA） spheres of diameter 250～300nm arranged on face centered cubic lattice are prepared using self-assembly method from aqueous collidal suspensions of PMMA spheres.Inverse opal CeO2：Eu^3＋ powders,exhibiting three-dimensional ordered macroporous（3DOM） structures,are also fabricated based on the PMMA colloidal crystal template.The structures and the properties of these samples are analyzed by XRD,SEM,absorption and luminescence spectra.The absorption spectra show a photonic bandgap at 413 nm for CeO2：Eu^3＋ inverse opal and bandgap at 612 nm for PMMA opal.The measured bandgap widths agree with computing results well.The luminescence of CeO2：Eu^3＋ inverse opal is investigated under low temperature.With decreasing temperature,the luminescence intensity increases,and the intensity from transition 5D0→7F2of Eu^3＋ increases faster than 5D0→7F 1 transition..The emission spectra at different temperatures show that the sysmmetry of Eu^3＋ site becomes lower with decreasing temperature.