Preparation of free-standing silica 3D colloidal crystal film at water-air interface

被引：16

作者：

Li, Wenjiang

Fu, Tao

He, Sailing

机构：

[1] Zhejiang Univ, Ctr Opt & Electromagnet Res, State Key Lab Modern Opt Instrumentat, Hangzhou, Peoples R China

[2] Royal Inst Technol, Joint Res Ctr Photon, Hangzhou 310058, Peoples R China

[3] Zhejiang Univ, Hangzhou 310058, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2006年 / 441卷 / 1-2期

关键词：

silica spheres; fabrication; three-dimension periodic structure; free-standing; film; PHOTONIC CRYSTALS; SIO2; SPHERES; LARGE AREAS; PARTICLES; CRYSTALLIZATION; FABRICATION; NANOPARTICLES; MICROSCOPY; MONOLAYERS; THICKNESS;

D O I：

10.1016/j.msea.2006.08.021

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A free-standing colloidal crystal film was facilely fabricated at a water-air interface using purified monodispersed SiO2 colloids in a half-close environment. The monodispered silica particles used were prepared by hydrolysis of tetraethyl orthosilicate (TEOS) in the presence of water and ammonia in ethanol medium. The free-standing film composed of highly ordered three-dimensionally periodic structures exhibited a vivid optical diffraction. The surface tensile force of solution, evaporation, capillary force and the electrostatic interaction of spheres were considered to be the main reason for the self-assembled process of the silica spheres at a water-air interface. The good quality freestanding opal film was anticipated in a diverse field such as photonic crystals and the template of macroporous materials. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：239 / 244

页数：6

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