Article Dans Une Revue Journal of Physics: Condensed Matter Année : 2011

Viscoelastic properties of confined molecular layers

Résumé

We study the viscoelastic properties of a film of n layers of spherical molecules confined between two walls. We find that the dynamic response arises from two competing contributions: the effective stiffness of n C 1 springs in series and softening due to strain fluctuations. In particular, the latter are the origin of the oscillatory behavior of the stiffness and the damping coefficient. The dissipation is strongest at the minima of the stiffness; the inverse behavior may occur for a modulated relaxation time. As a corollary we show that confined molecular layers cannot be described as Maxwell fluids.

Fichier principal
Vignette du fichier
Structuration.pdf (194.85 Ko) Télécharger le fichier
Origine Fichiers produits par l'(les) auteur(s)
Licence
Loading...

Dates et versions

hal-00641816 , version 1 (16-11-2011)

Licence

Identifiants

Citer

Alois Würger. Viscoelastic properties of confined molecular layers. Journal of Physics: Condensed Matter, 2011, 23 (50), pp.505103. ⟨10.1088/0953-8984/23/50/505103⟩. ⟨hal-00641816⟩
81 Consultations
225 Téléchargements

Altmetric

Partager

  • More