Structural characterization of dense colloidal films using a modified pair distribution function and Delaunay triangulation

被引：32

作者：

Hansen, PHF ^{[1
]}

Rödner, S ^{[1
]}

Bergström, L ^{[1
]}

机构：

[1] Inst Surface Chem, SE-11486 Stockholm, Sweden

来源：

LANGMUIR | 2001年 / 17卷 / 16期

关键词：

D O I：

10.1021/la001683z

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Methods for structural characterization of particle films have been developed. Monodisperse silica particles with alkoxy chains grafted on the surface formed dense colloidal films at the air-liquid interface. The positions of the partly immersed particles were determined by light microscopy and image analysis. The average size of the ordered domains could be estimated from the pair distribution function. We were also able to determine the distribution of pores and defects in the colloidal film using Delaunay triangulation. The two methods were used to study the effect of interparticle bond strength on the film structure. We found that the size of the ordered domains decreased exponentially when the bond strength increased, while the pore density increased. The effect of drying on structural changes of the colloidal film was also discussed.

引用

页码：4867 / 4875

页数：9

共 29 条

[1] Mesoscopically periodic photonic-crystal materials for linear and nonlinear optics and chemical sensing [J].