Poiseuille flow at a nanometer scaleB. 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