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Concentrated crystallization of closely packed colloidal crystal films from aqueous suspension immersed in silicone oil

Published online by Cambridge University Press:  01 February 2011

Hiroshi Fudouzi ,
Tsutomu Sawada  and
Lucien Brush
Hiroshi Fudouzi
Affiliation:
[email protected]
Tsutomu Sawada
Affiliation:
[email protected], Nat Inst Mater Sci, Tsukuba, Japan
Lucien Brush
Affiliation:
[email protected], University of Washington, Materials Science and Engineering, Seattle, Washington, United States
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Abstract

Colloidal crystals have been attracting much attention due to their novel use as 3D-photonic crystals and to their structural color. We have been developing a method for the colloidal crystal growth of opal films immersed in silicone oil. This method is one of the evaporative self-assembly techniques for opal films from colloidal particle suspensions. Understanding the mechanism of the process is important to assure the coating of high-quality opal thin films. The colloidal crystallization from suspension was observed with a long working distance optical microscope and Bragg's diffraction peaks were measured with a miniature fiber optic spectrometer. The transition from a non-crystalline to a crystalline phase is observed within a region between the disordered colloidal suspension and the colloidal crystal film. Within this region, that spans a distance of about 400μm, the lattice of the colloidal crystal reduces until it transitions to the close-packed structure.

Keywords

self-assemblycolloidcrystal growth
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1273: Symposium MM – Evaporative Self Assembly of Polymers, Nanoparticles, and DNA , 2010 , 1273-MM08-06
Copyright
Copyright © Materials Research Society 2010

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References

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