Liu Xiangmei, Du Xin, He Junhui
Functional Nanomaterials Laboratory and Key Laboratory of Organic, Optoelectronic Functional Materials and Molecular Engineering, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Haidianqu, Beijing, China.
Chemphyschem. 2008 Feb 1;9(2):305-9. doi: 10.1002/cphc.200700712.
Raspberrylike organic/inorganic composite spheres are prepared by stepwise electrostatic assembly of polyelectrolytes and silica nanoparticles onto monodisperse polystyrene spheres. Hierarchically structured porous films of silica hollow spheres are fabricated from these composite spheres by layer-by-layer assembly with polyelectrolytes followed by calcination. The morphologies of the raspberrylike organic/inorganic composite spheres and the derived hierarchically structured porous films are observed by scanning and transmission electron microscopy. The surface properties of these films are investigated by measuring their water contact angles, water-spreading speed, and antifogging properties. The results show that such hierarchically structured porous films of silica hollow spheres have unique superhydrophilic and antifogging properties. Finally, the formation mechanism of these nanostructures and property-structure relationships are discussed in detail on the basis of experimental observations.
通过将聚电解质和二氧化硅纳米颗粒逐步静电组装到单分散聚苯乙烯球上，制备出树莓状有机/无机复合球。通过与聚电解质逐层组装，然后煅烧，由这些复合球制备出二氧化硅空心球的分层结构多孔膜。通过扫描电子显微镜和透射电子显微镜观察树莓状有机/无机复合球和衍生的分层结构多孔膜的形态。通过测量它们的水接触角、水铺展速度和防雾性能来研究这些膜的表面性质。结果表明，这种二氧化硅空心球的分层结构多孔膜具有独特的超亲水性和防雾性能。最后，根据实验观察结果详细讨论了这些纳米结构的形成机理和性能-结构关系。
