Viscosity-dependent liquid slip at molecularly smooth hydrophobic surfaces.
Colloidal probe atomic force microscopy is used to study the slip behavior of 18 Newtonian liquids from two homologous series, the n-alkanes and n-alcohols, at molecularly smooth hydrophobic n-hexadecyltrichlorosilane coated surfaces. We find that the slip behavior is governed by the bulk viscosity eta of the liquid, specifically, the slip length b approximately etax with x approximately 0.33. Additionally, the slip length was found to be shear rate independent, validating the use of Vinogradova slip theory in this work.
McBride
Sean P
SP
Department of Physics, Cardwell Hall, Kansas State University, Manhattan, Kansas 66506-2601, USA.
Law
Bruce M
BM
D003198:Computer Simulation; D017276:Friction; D057927:Hydrophobic and Hydrophilic Interactions; D008956:Models, Chemical; D012212:Rheology / Q000379:methods*; D012996:Solutions / Q000737:chemistry*; D013499:Surface Properties; D014783:Viscosity
D012996:Solutions