Shear-banding phenomena and dynamical behavior in a Laponite suspension (Articolo in rivista)

Type
Label
  • Shear-banding phenomena and dynamical behavior in a Laponite suspension (Articolo in rivista) (literal)
Anno
  • 2008-01-01T00:00:00+01:00 (literal)
Alternative label
  • Ianni, F; Di Leonardo, R; Gentilini, S; Ruocco, G (2008)
    Shear-banding phenomena and dynamical behavior in a Laponite suspension
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Ianni, F; Di Leonardo, R; Gentilini, S; Ruocco, G (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 77 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • \"[Ianni, F.; Gentilini, S.; Ruocco, G.] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy; [Ianni, F.; Di Leonardo, R.; Ruocco, G.] Univ Roma La Sapienza, CNR, INFM, SOFT, I-00185 Rome, Italy (literal)
Titolo
  • Shear-banding phenomena and dynamical behavior in a Laponite suspension (literal)
Abstract
  • Shear localization in an aqueous clay suspension of Laponite is investigated through dynamic light scattering, which provides access both to the dynamics of the system (homodyne mode) and to the local velocity profile (heterodyne mode). When shear bands form, a relaxation of the dynamics typical of a gel phase is observed in both bands soon after the flow stops. Periodic oscillations of the flow behavior, typical of a stick-slip phenomenon, are also observed when shear localization occurs. Both results are discussed in the light of various theoretical models for soft glassy gels. (literal)
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