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Devitrification of colloidal glasses in real space | | Nikoleta B Simeonova
; Roel P A Dullens
; Dirk G A L Aarts
; Volkert W A de Villeneuve
; Henk N W Lekkerkerker
; Willem K Kegel
; | | Date: |
31 Mar 2006 | | Journal: | Phys Rev E, 73 (4 Pt 1), 041401 | | Abstract: | Confocal scanning laser microscopy has been used to quantitatively analyze the structure and dynamics of concentrated suspensions of spherical colloids in which the magnitude of the short-range attractive potential is increased by adding nonadsorbing polymers. These systems undergo a reentrant glass transition upon increasing polymer concentration. We find that melting of the glass is accompanied by significant changes in the displacement distribution and its moments. However, no significant variations have been detected in the shapes of the displacement distributions. Moreover, structural correlation functions and the magnitude of local density fluctuations do not vary significantly between the glass states and the fluid. Considering our experimental setup, these observations imply that local density fluctuations cannot be larger than a few percent of the average density. | | Source: | PubMed, pmid16711794 | | Services: | Forum | Review | Favorites | |
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