Affordable Access

Bulk-like viscosity and shear thinning during dynamic compression of a nanoconfined liquid

Authors
  • Khan, Shah H.
  • Hoffmann, Peter M.
Type
Preprint
Publication Date
Oct 12, 2012
Submission Date
Oct 12, 2012
Identifiers
arXiv ID: 1210.3540
Source
arXiv
License
Yellow
External links

Abstract

The viscosity of liquids under nanoconfinement remains controversial. Reports range from spontaneous solidification to no change in the viscosity at all. Here, we present thorough measurements with a small-amplitude linear atomic force microscopy technique and careful consideration of the confinement geometry, to show that in a weakly interacting liquid, average viscosity remains bulk like, except for strong shear thinning once the liquid is confined to less than four molecular layers. Overlaid over this bulk-like viscous behavior are stiffness and damping oscillations, indicating non-continuum behavior, as well as an elastic response when the liquid is allowed to order in the confinement gap.

Report this publication

Statistics

Seen <100 times