Europhys. Lett.
Volume 74, Number 2, April 2006
Page(s) 294 - 298
Section Condensed matter: structural, mechanical and thermal properties
Published online 08 March 2006
Europhys. Lett., 74 (2), pp. 294-298 (2006)
DOI: 10.1209/epl/i2005-10520-5

Poiseuille flow at a nanometer scale

B. Marchon and T. E. Karis

Hitachi GST, San Jose Research Center - CA 95120, USA

received 29 September 2005; accepted in final form 14 February 2006
published online 8 March 2006

The spreading behavior of non-polar polymers in the nanometer thickness range is revisited. By incorporating a distance of closest approach d0 corresponding to the unbonded atom-atom distance, to the classical London slab-slab interaction energy, we demonstrate that the spreading profiles of a non-polar perfluoropolyether molecule perfectly obeys a Poiseuille flow driven by a disjoining pressure gradient. The dynamics of the thin film is entirely defined by d0, the polymer bulk viscosity, and the composite Hamaker constant of the polymer/surface system.

68.08.-p - Liquid-solid interfaces.
68.08.Bc - Wetting.

© EDP Sciences 2006