Characterization of colloidal crystal film of polystyrene particles at the air-suspension interface

被引：8

作者：

Imura, Yoshiro ^{[1
]}

Nakazawa, Hiroko ^{[1
]}

Matsushita, Emi ^{[1
]}

Morita, Clara ^{[1
]}

Kondo, Takeshi ^{[1
]}

Kawai, Takeshi ^{[1
]}

机构：

[1] Tokyo Univ Sci, Dept Ind Chem, Fac Engn, Shinjuku Ku, Tokyo 1628601, Japan

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2009年 / 336卷 / 02期

关键词：

Colloidal crystal; Polystyrene; Bragg diffraction; Structural color; PHOTONIC CRYSTALS; LARGE AREAS; ELECTROPHORETIC DEPOSITION; MACROPOROUS MEMBRANES; SPONTANEOUS EMISSION; VERTICAL DEPOSITION; MESOSCALE PARTICLES; FABRICATION; SPHERES; CRYSTALLIZATION;

D O I：

10.1016/j.jcis.2009.04.015

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：

An aqueous suspension of polystyrene (PS) particles gave rise to a distinct color when a water-soluble volatile solvent, Such as methanol or acetone, was added and left to evaporate. The color was caused by the formation of a colloidal crystal film of PS particles at the air-suspension interface. The colloidal crystal formation was possibly induced by the shear flow of particles and condensation of the Suspension due to evaporation of the solvent. The colloidal crystal was estimated to consist of about 120 layers of PS particles. PS particles in the colloidal crystals formed a periodic array among the dispersion media, and the interparticle distance of the particles depended on the conductivity of the suspension. Further, the color of the colloidal crystal film as observed by the naked eye was complementary to the direct reflection peak. (C) 2009 Elsevier Inc. All rights reserved.

引用

页码：607 / 611

页数：5

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