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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. doi:10.1103/PhysRevLett.84.2275 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 |
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| 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: |
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| 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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