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Oriented Colloidal-Crystal Thin Films by Spin-Coating Microspheres Dispersed in Volatile Media

Authors

  • A. Mihi,

    1. Instituto de Ciencia de Materiales de Sevilla, Consejo Superior de Investigaciones Científicas, Avda. Américo Vespucio s/n, Isla de La Cartuja, 41092 Sevilla, Spain
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  • M. Ocaña,

    1. Instituto de Ciencia de Materiales de Sevilla, Consejo Superior de Investigaciones Científicas, Avda. Américo Vespucio s/n, Isla de La Cartuja, 41092 Sevilla, Spain
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  • H. Míguez

    1. Instituto de Ciencia de Materiales de Sevilla, Consejo Superior de Investigaciones Científicas, Avda. Américo Vespucio s/n, Isla de La Cartuja, 41092 Sevilla, Spain
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  • This research has been partially funded by Fundación Ramón Areces and Ministry of Science and Education under grant MAT2005-03028. A. M. thanks Fundación Ramón Areces for a scholarship. We thank M. C. Jiménez de Haro for her invaluable help during SEM characterization. The material herein presented is the subject of a recent patent (Spanish patent application number: P200601527).

Abstract

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A simple, reproducible, and reliable method to crystallize sub-micrometer-size spherical colloids using a mixture of volatile solvents as dispersion media is presented. Strongly diffracting direct opal structures of high uniformity are attainable over large areas within minutes and without further processing. Thickness and orientation control is also possible through this technique. In the figure, both [111] (left) and [100] (right) oriented lattices deposited on glass slides are shown.

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