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8 October 2007 Fabrication of single-domain colloidal crystal gel films and their tuning characteristics
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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.
© (2007) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Tsutomu Sawada, Toshimitsu Kanai, and Akiko Toyotama "Fabrication of single-domain colloidal crystal gel films and their tuning characteristics", Proc. SPIE 6767, Photonic Crystals and Photonic Crystal Fibers for Sensing Applications III, 676702 (8 October 2007); https://doi.org/10.1117/12.733274
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