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Proceedings Paper

Fabrication of single-domain colloidal crystal gel films and their tuning characteristics
Author(s): Tsutomu Sawada; Toshimitsu Kanai; Akiko Toyotama
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Paper Abstract

We have developed a simple method to produce large colloidal crystal films for a like-charged particles system, where particle arrays with single-crystalline-like characteristics are made by a flow-induced process. A poly-crystalline suspension was charged in a flat capillary and processed by strong shear flow. Optical characterizations for the uniform samples indicate that almost all the capillary space (several square centimeters wide and 0.1mm thick) is filled with a single-domain crystal with a fixed crystallographic orientation determined by the cell geometry. The single-domain crystal can be fixed in a self-standing hydro-gel film by polymerizing gelation agents added in the suspension. Upon gelation, the optical quality was found to be well preserved. We also show tunable characteristics of the gelled crystals in some different aspects. They can be contracted by changing the composition of the solvent. The stop-band width can be effectively expanded by adjusting the fabrication condition. These transformations can be made as single domains that should be advantageous to application purposes.

Paper Details

Date Published: 8 October 2007
PDF: 9 pages
Proc. SPIE 6767, Photonic Crystals and Photonic Crystal Fibers for Sensing Applications III, 676702 (8 October 2007); doi: 10.1117/12.733274
Show Author Affiliations
Tsutomu Sawada, National Institute for Materials Science (Japan)
Toshimitsu Kanai, National Institute for Materials Science (Japan)
Akiko Toyotama, National Institute for Materials Science (Japan)

Published in SPIE Proceedings Vol. 6767:
Photonic Crystals and Photonic Crystal Fibers for Sensing Applications III
Henry H. Du; Hiroshi Fudouzi, Editor(s)

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