中文摘要：

有大毛孔和大粒子尺寸的聚苯乙烯(PS )@ SiO ₂ 核心壳 microbeads 经由 layer-by-layer (LBL ) 被准备为在 nano 微的 composites 的潜在的应用的集会技术。否定硅石 nanoparticles 经由修改的圣综合了 ?(diallyldimethylammonium 氯化物) ber 方法和 cationic 或者 poly 在 microbeads 的表面上被吸附。microbeads 的希腊语的第六个字母潜力，尺寸，和形态学在 LBL 汇编过程期间被监视保证硅石 nanoparticles 的成功的免职。多孔的壳被描绘使用氮吸附和解吸附作用分析，并且毛孔的表面区域，体积和直径被导出。多孔的壳厚度和毛孔尺寸能被改变硅石 nanoparticles 的涂层时间调节，这被发现。最后，有 5 的 PS@SiO ₂ 核心壳 microbeads， m PS 稳固的核心并且 350， nm mesoporous 壳(吝啬的 BJH 毛孔直径是 ~ 27， nm ) 被用来装载 CdSe/ZnS 量点(QD ) 。荧光显微镜的图象和嵌入 QDs 的 microbeads (QDB ) 的光扩大显示同样准备的核心壳 microbeads 能为 QD 提供足够的空间并且可能为 nano 微的 composites 的进一步的申请有用。

英文摘要：

Polystyrene （PS） @SiO2 core-shell microbeads with large pore and large particle size were prepared via layer-by-layer（LBL）assembly technique for potential applications in nano-micro composites. Negative silica nanoparticles synthesized via modified St6ber method and cationic poly （diallyldimethylammonium chloride） were alternately adsorbed on the surface of microbeads. Zeta potential, size, and morphology of the microbeads were monitored during LBL assembly process to ensure the successful deposition of silica nanoparticles. The porous shell was characterized using nitrogen adsorption and desorption analyses, and the surface area, volume and diame- ter of the pores were derived. It is found that the porous shell thickness and the pore size can be tuned by changing the coating times of silica nanoparticles. Finally, PS@SiO2 core-shell microbeads with 5 grn PS solid core and 350 nm mesoporous shell （mean BJH pore diameter is ~27 nm） were used to load CdSe/ZnS quantum dots （QDs）. The fluorescence microscopic image and the optical amplification of the QDs-embedded microbeads （QDBs） indicate that the as-prepared core-shell microbeads can provide adequate space for QDs and may be useful for further application of nano-micro composites.