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Universal aging features in the restructuring of fractal colloidal gels

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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. ISSN 0031-9007

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Official URL: http://dx.doi.org/10.1103/PhysRevLett.84.2275

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 > 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:

Page Range:

pp. 2275-2278

Identification Number:

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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