Hierarchically structured porous films of silica hollow spheres via layer-by-layer assembly and their superhydrophilic and antifogging properties

被引：113

作者：

Liu, Xiangmei ^{[1
,2
]}

Du, Xin ^{[1
,2
]}

He, Junhui ^{[1
]}

机构：

[1] Chinese Acad Sci, Tech Inst Phys & Chem, Funct Nanomat Lab, Key Lab Organ Optoelect Funct Mat & Mol Engn, Beijing 100080, Peoples R China

[2] Grad Univ Chinese Acad Sci, Beijing 100864, Peoples R China

来源：

CHEMPHYSCHEM | 2008年 / 9卷 / 02期

关键词：

nanostructures; self-assembly; silica; superhydrophilicity; thin films;

D O I：

10.1002/cphc.200700712

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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 nonostructures and property-structure relationships are discussed in detail on the basis of experimental observations.

引用

页码：305 / 309

页数：5

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