二维胶体晶体异质结构的制备及传感性  

Preparation and Chemical Sense Character of Two-dimensional Colloidal Crystal Heterostructures

作　　者：齐丰莲 薛敏[1] 薛飞[1] 孟子晖[1] 邱丽莉[1] 徐志斌[1] 芦薇[1] 

机构地区：[1]北京理工大学化工与环境学院,北京100081

出　　处：《高等学校化学学报》2015年第8期1612-1618,共7页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:21375009)资助~~

摘　　要：制备具有不同粒径和折射率的聚苯乙烯(PS)和聚甲基丙烯酸甲酯(PMMA)微球,采用多次尖端导流法制备多重二维胶体晶体异质结构(2D-CCHs)阵列,在2D-CCHs阵列的间隙处填充丙烯酸类凝胶,再将PS或PMMA模板微球去掉,得到传质速度更快的2D-CCHs反蛋白石凝胶.经扫描电子显微镜证实,所制备的异质结构胶体晶体均为二维结构,且排列较为规整.德拜衍射、反射光谱和结构色分析结果表明,2D-CCHs的光学性质主要是各单层二维胶体晶体阵列独立衍射的叠加.随着p H值由7降低至3,双层2D-CCHs反蛋白石凝胶的德拜衍射环直径均减小了约80 nm,表明2D-CCHs反蛋白石凝胶可应用于化学传感领域.Polystyrene（ PS） and poly（ methyl methacrylate）（ PMMA） suspensions with different particle sizes and refractive index were prepared. A successive air / water interface self-assembly method was developed to fabricate two-dimensional colloidal crystal heterostructures（ 2D-CCHs） array. Furthermore,2-hydroxyethyl methacrylate-acrylic acid（ HEMA-AA） 2D-CCHs inverse opals with high mass transfer efficiencies were obtained after removing the opal templates. The prepared heterostructures are highly ordered two-dimensional structures proved by scanning electron microscopy images（ SEM）. Debye diffraction rings,reflectance spectra and structural colors suggested that the optical properties of 2D-CCHs are attributed to overlay of the individual diffraction of single 2D colloidal crystal. With the pH value decreased from 7 to 3,Debye diffraction rings＇ diameters of double-layers 2D-CCHs inverse opals both shrank nearly 80 nm. The response of 2D-CCHs to pH indicates their preliminary application in chemical sensors.

关 键 词：胶体晶体 异质结构 尖端导流 聚苯乙烯 聚甲基丙烯酸甲酯 

分 类 号：O631[理学—高分子化学] O613.7[理学—化学]