Motions in binary mixtures of hard colloidal spheres: Melting of the glass

Williams, S and Van Megen, W 2001, 'Motions in binary mixtures of hard colloidal spheres: Melting of the glass', Physical Review E, vol. 64, no. 4, pp. 415021-415029.


Document type: Journal Article
Collection: Journal Articles

Title Motions in binary mixtures of hard colloidal spheres: Melting of the glass
Author(s) Williams, S
Van Megen, W
Year 2001
Journal name Physical Review E
Volume number 64
Issue number 4
Start page 415021
End page 415029
Total pages 8
Publisher American Physical Society
Abstract Dynamic light-scattering experiments are performed on binary mixtures of hard-sphere-like colloidal suspensions with a size ratio of 0.6. The optical properties of the particles are such that the relative contrast of the two species is very sensitive to temperature, a feature that is exploited to obtain the three partial coherent intermediate scattering functions. The glass transition is identified by the onset of structural arrest, or arrest of the a process, on the time scale of the experiment. This is observed in a one-component suspension at a packing fraction of 0.575. The intermediate scattering functions measured on the mixtures quantify how, on introduction of the smaller spheres, the a process is released, i.e., how the glass melts. Increasing the fraction of smaller particles causes the a process to speed up but, at a given wave vector, also incurs a change to its amplitude in proportion to the change in the (partial) structure factor.
DOI - identifier 10.1103/PhysRevE.64.041502
Copyright notice © 2001 The American Physical Society
ISSN 1063-651x
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