Journal article

Ultra-long range correlations of the dynamics of jammed soft matter

  • Maccarrone, S. Laboratoire des Colloïdes, Verres et Nanomatériaux, UMR 5587, Université Montpellier II, France
  • Brambilla, G. Laboratoire des Colloïdes, Verres et Nanomatériaux, UMR 5587, Université Montpellier II, France
  • Pravaz, O. Laboratoire des Colloïdes, Verres et Nanomatériaux, UMR 5587, Université Montpellier II, France
  • Duri, Agnès Laboratoire des Colloïdes, Verres et Nanomatériaux, UMR 5587, Université Montpellier II, France
  • Ciccotti, M. Laboratoire des Colloïdes, Verres et Nanomatériaux, UMR 5587, Université Montpellier II, France
  • Fromental, J.-M. Laboratoire des Colloïdes, Verres et Nanomatériaux, UMR 5587, Université Montpellier II, France
  • Pashkovski, E. Unilever Res Labs, Trumbull, USA
  • Lips, A. Unilever Discover, Port Sunlight, UK
  • Sessoms, David Physics Department, Université de Fribourg, Switzerland
  • Trappe, Véronique Physics Department, Université de Fribourg, Switzerland
  • Cipelletti, Luca Laboratoire des Colloïdes, Verres et Nanomatériaux, UMR 5587, Université Montpellier II, France
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    09.09.2010
Published in:
  • Soft Matter. - 2010, vol. 6, no. 21, p. 5514-5522
English We use photon correlation imaging, a recently introduced space-resolved dynamic light scattering method, to investigate the spatial correlation of the dynamics of a variety of jammed and glassy soft materials. Strikingly, we find that in deeply jammed soft materials spatial correlations of the dynamics are quite generally ultra-long ranged, extending up to the system size, orders of magnitude larger than any relevant structural length scale, such as the particle size, or the mesh size for colloidal gel systems. This has to be contrasted with the case of molecular, colloidal and granular “supercooled” fluids, where spatial correlations of the dynamics extend over a few particles at most. Our findings suggest that ultra long range spatial correlations in the dynamics of a system are directly related to the origin of elasticity. While solid-like systems with entropic elasticity exhibit very moderate correlations, systems with enthalpic elasticity exhibit ultra-long range correlations due to the effective transmission of strains throughout the contact network.
Faculty
Faculté des sciences et de médecine
Department
Département de Physique
Language
  • English
Classification
Physics
License
License undefined
Identifiers
Persistent URL
https://folia.unifr.ch/unifr/documents/301703
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