Effects of pH and ionic strength on the self-assembly of silica colloids to opaline photonic structures

被引：29

作者：

Piret, F. ^{[1
]}

Su, B. -L. ^{[1
]}

机构：

[1] Fac Univ Notre Dame Paix, Lab Inorgan Mat Chem, B-5000 Namur, Belgium

来源：

CHEMICAL PHYSICS LETTERS | 2008年 / 457卷 / 4-6期

关键词：

D O I：

10.1016/j.cplett.2008.04.036

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：

The effect of the pH and the ionic strength on the self-assembly of colloidal silica spheres have been studied. The optical properties of the obtained opaline structures have been investigated. The deposition process of colloidial silica spheres and the. ne structure of opal films have been examined by SEM. It was shown that the surface charge of particles, modified or screened by pH and counterions, has a crucial role in the formation of homogeneous and well ordered opal films. The present work supplied an essential comprehension of the self-assembly of SiO2 spheres towards a better control of vertical deposition method leading to high quality opal-based photonic crystals. (c) 2008 Elsevier B. V. All rights reserved.

引用

页码：376 / 380

页数：5

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