Phys. Rev. Lett. 75, 2770–2773 (1995)Linear Viscoelasticity of Colloidal Hard Sphere Suspensions near the Glass TransitionReceived 3 April 1995; published in the issue dated 2 October 1995 The frequency-dependent viscoelastic shear modulus of concentrated suspensions of colloidal hard spheres is shown to be strongly modified as the volume fraction approaches the glass transition. The elastic or storage component, G′, becomes larger than the viscous or loss component, G′′. The frequency dependence of G′ develops a plateau while that of G′′ develops a minimum. We propose a physical model to account for these data, using a description of the glasslike behavior based on mode-coupling theory, and a description of the high-frequency behavior based on hydrodynamic flow calculations. © 1995 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.75.2770
DOI:
10.1103/PhysRevLett.75.2770
PACS:
83.50.Fc, 64.70.Pf, 82.70.Dd, 83.70.Hq
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