Cipelletti, L., Manley, S., Ball, Robin and Weitz, D. A. (2000) Universal aging features in the restructuring of fractal colloidal gels. Physical Review Letters, Vol.84 (No.10). pp. 2275-2278. doi:10.1103/PhysRevLett.84.2275

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Abstract

We use multispeckle dynamic light scattering to measure the dynamic structure factor, f(q, tau), of gels formed by aggregation of colloids. Although the gel is an elastic solid, f(q, tau) nearly completely decays on long time scales, with an unusual form, f(q, tau) similar to exp{-(tau/tau(f))(mu)}, with mu approximate to 1.5 and with tau(f) proportional to q(-1) A model for restructuring of the gel with aging correctly accounts for this behavior. Aging leads to a dramatic increase in tau(f) however, all data can be scaled on a single master curve, with tau(f) asymptotically growing linearly with age. This behavior is strikingly similar to that predicted for aging in disordered glassy systems, offering convincing proof of the universality of these concepts.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics Q Science > QD Chemistry
Divisions:	Faculty of Science, Engineering and Medicine > Science > Physics
Library of Congress Subject Headings (LCSH):	Colloids, Fractals
Journal or Publication Title:	Physical Review Letters
Publisher:	American Physical Society
ISSN:	0031-9007
Official Date:	6 March 2000
Dates:	Date Event 6 March 2000 Published
Volume:	Vol.84
Number:	No.10
Number of Pages:	4
Page Range:	pp. 2275-2278
DOI:	10.1103/PhysRevLett.84.2275
Status:	Peer Reviewed
Publication Status:	Published
Funder:	United States. National Aeronautics and Space Administration (NASA), National Science Foundation (U.S.) (NSF)
Grant number:	NAG3-2284 (NASA), DMR-9971432 (NSF), DMR-9704300 (NSF)

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