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Control of Colloidal Crystal Growth by External Fields

Published online by Cambridge University Press:  26 February 2011

Elisabeth von Rhein
Affiliation:
lisa@vrhein.de
Andreas Bielawny
Affiliation:
bielawny@physik.upb.de
Siegmund Greulich-Weber
Affiliation:
greulich-weber@physik.upb.de, University of Paderborn, Physics, Warburger Str. 100, Paderborn, NRW, 33098, Germany, +495251602740
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Abstract

Synthetic opals serve as templates for the most promising three-dimensional photonic crystals, so-called inverted opals. The time consuming growth of artificial opals by self-assembly of monodisperse sub-micron spheres made of silica or organic materials resulting in fcc and hcp colloidal crystals usually yields in limited crystal qualities. The large scale fabrication and thus their application in photonics suffer from the reproducible growth of defect-free extended bulk crystals. In this paper we propose a sonic wave supported fast colloidal crystal growth in a centrifugal field. White noise acoustic irradiation is thought to realize an artificial temperature allowing particle diffusion during crystal growth.

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