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Time-dependent strength of colloidal gels
  • S. Manley, Harvard University
  • Benny Davidovitch, Harvard University
  • Neil R. Davies, Harvard University
  • L. Cipelletti, Universite Montpellier II
  • A. E. Bailey, Harvard University
  • Rebecca J. Christianson, Olin College of Engineering
  • U. Gasser, University of Konstanz
  • V. Prasad, University of California - Santa Barbara
  • P. N. Segre, Harvard University
  • M. P. Doherty, NASA Glenn Research Center
  • S. Sankaran, NASA Glenn Research Center
  • A. L. Jankovsky, NASA Glenn Research Center
  • B. Shiley, Zin Technologies, Inc.
  • J. Bowen, Zin Technologies, Inc.
  • J. Eggers, Zin Technologies, Inc.
  • C. Kurta, Zin Technologies, Inc.
  • T. Lorik, Zin Technologies, Inc.
  • D. A. Weitz, Harvard University
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Colloidal silica gels are shown to stiffen with time, as demonstrated by both dynamic light scattering and bulk rheological measurements. Their elastic moduli increase as a power law with time, independent of particle volume fraction; however, static light scattering indicates that there are no large-scale structural changes. We propose that increases in local elasticity arising from bonding between neighboring colloidal particles can account for the strengthening of the network, while preserving network structure.

© (2005) American Physical Society. The article appeared in Physical Review Letters, Vol 95, and may be found at

Citation Information
S. Manley, Benny Davidovitch, Neil R. Davies, L. Cipelletti, et al.. "Time-dependent strength of colloidal gels" (2005)
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