Journal
COLLOID AND POLYMER SCIENCE
Volume 286, Issue 10, Pages 1123-1133Publisher
SPRINGER
DOI: 10.1007/s00396-008-1874-2
Keywords
poly (methyl methacrylate) colloids; convectional pattern; drying pattern; dissipative structure; spoke line; broad ring; cover glass
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Direct observation of the convectional dissipative patterns was successful during the course of dryness of colloidal crystals of poly (methyl methacrylate) spheres on a cover glass. Formation processes of the convectional patterns of spoke-like lines were observed as a function of sphere size and also sphere concentration. During dryness of the suspensions, the brilliant iridescent colors changed beautifully. Macro- and microscopic drying patterns and thickness profiles of the dried film were observed. Sharp broad rings were observed especially at low sphere concentrations. The water evaporation accompanied with the convectional flow of water and the colloidal spheres played an important role for these dissipative structure formation.
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