Effect of Surface Elasticity on the Rheology of Nanometric Liquids

Richard Villey (1) , Emmanuelle Martinot (2) , Cécile Cottin-Bizonne (1) , Magali Phaner-Goutorbe (3) , Liliane Léger (2) , Frédéric Restagno (2) , Elisabeth Charlaix (4)

1 ILM - Institut Lumière Matière [Villeurbanne]
2 LPS - Laboratoire de Physique des Solides
3 INL - C&N - INL - Chimie et Nanobiotechnologies
4 LIPhy - Laboratoire Interdisciplinaire de Physique [Saint Martin d’Hères]

The rheological properties of liquids con ned to nanometer scales are important in many physical situations. In this paper we demonstrate that the long range elastic deformation of the con ning surfaces must be taken into account when considering the rheology of nanometric liquids. In the case of a squeeze- ow geometry, we show that below a critical distance Dc the liquid is clamped by its viscosity and its intrinsic properties cannot be disentangled from the global system response. Using nanorheology experiments, we demonstrate that picometer elastic de ections of the rigid con ning surfaces dominate the overall mechanical response of nanometric liquids con ned between solid walls.

Domaines: Matière Molle [cond-mat.soft]

Richard Villey, Emmanuelle Martinot, Cécile Cottin-Bizonne, Magali Phaner-Goutorbe, Liliane Léger, et al.. Effect of Surface Elasticity on the Rheology of Nanometric Liquids. Physical Review Letters, 2013, 111 (21), pp.215701. ⟨10.1103/PhysRevLett.111.215701⟩. ⟨hal-00967566⟩