Journal article

Resolving long-range spatial correlations in jammed colloidal systems using photon correlation

  • Duri, Agnès LCVN, UMR 5587 Université Montpellier 2 and CNRS, France - IATE, UMR 1208, INRA-CIRAD-UMII-Supagro, France
  • Sessoms, David A. Département de Physique, Université de Fribourg, Switzerland
  • Trappe, Véronique Département de Physique, Université de Fribourg, Switzerland
  • Cipelletti, Luca LCVN, UMR 5587 Université Montpellier 2 and CNRS, France
Show more…
    23.02.2009
Published in:
  • Physical Review Letters. - 2009, vol. 102, no. 08, p. 085702
English We introduce a new dynamic light scattering method, termed photon correlation imaging, which enables us to resolve the dynamics of soft matter in space and time. We demonstrate photon correlation imaging by investigating the slow dynamics of a quasi-two-dimensional coarsening foam made of highly packed, deformable bubbles and a rigid gel network formed by dilute, attractive colloidal particles. We find the dynamics of both systems to be determined by intermittent rearrangement events. For the foam, the rearrangements extend over a few bubbles, but a small dynamical correlation is observed up to macroscopic length scales. For the gel, dynamical correlations extend up to the system size. These results indicate that dynamical correlations can be extremely long-ranged in jammed systems and point to the key role of mechanical properties in determining their nature.
Faculty
Faculté des sciences
Department
Physique
Language
  • English
Classification
Physics
License
License undefined
Identifiers
Persistent URL
https://folia.unifr.ch/unifr/documents/300989
Statistics

Document views: 5 File downloads:
  • trappe_rlr.pdf: 2