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Colloidal Crystallization by a Centrifugation Method by Yoshihisa Suzuki; Tsutomu Sawada; Katsuhiro Tamura is a Engineering article available to read on EtoBox.

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Colloidal crystals of high particle concentration were smoothly and continuously fabricated by simple centrifugation of a dispersion of polystyrene particles in water. The larger the applied centrifugal acceleration a at the bottom of the growing crystals (i.e., the interior wall of the container), the higher the growth rates are. The average grain sizes in the crystals increased with decrease in a, and below a critical value of a, we obtained relatively large columnar-shaped grains. The average volume fraction of the obtained colloidal crystals f ave. increased with an increase in the dispersion's KCl concentration C KCl : at a1⁄482 G, f ave. 1⁄4 0.57 and 0.61 at C KCl 1⁄4 2 Â 10 À 3 and 8 Â 10 À 3 mol kg À 1 water, respectively. The grain size also increased with an increase in C KCl . The maximum grain size in this study was greater than 0.3 mm in width and 8 mm in length.

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Author

Yoshihisa Suzuki; Tsutomu Sawada; Katsuhiro Tamura

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0022-0248)

Published

2011

Language

EN

Field

Engineering (Physical Sciences)