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19 April 2024 |
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Colloidal hard-sphere crystal growth frustrated by large spherical impurities | | Volkert W A de Villeneuve
; Roel P A Dullens
; Dirk G A L Aarts
; Esther Groeneveld
; Johannes H Scherff
; Willem K Kegel
; Henk N W Lekkerkerker
; | | Date: |
19 Aug 2005 | | Journal: | Science, 309 (5738), 1231-3 | | Abstract: | Impurities affect the nucleation, growth, and structure of crystals. Here we report the effect of large, spherical, polymethylmethacrylate impurities on the crystal growth of monodisperse, hard, polymethylmethacrylate colloids in a density- and optically matching apolar solvent mixture. Crystal growth, initiated at the bottom of the sample, was studied by imaging sequences of two-dimensional xy slices in the plane of the impurity’s center with a laser scanning confocal microscope. Impurities form the center of grain boundaries, and a single fluid particle layer around the impurity persists in all cases. The growth rate sensitively depends on the impurity’s size. Crystal growth is inhibited to a greater extent near smaller impurities, pointing to local crystal frustration induced by the curvature of the impurity. | | Source: | PubMed, pmid16109877 doi: 10.1126/science.1113207 | | Services: | Forum | Review | Favorites | |
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