Open AccessEffect of high-viscosity interphases on drainage between hydrophilic surfaces.
Author(s) -
Peter J. Feibelman
Publication year - 2004
Publication title -
langmuir : the acs journal of surfaces and colloids
Language(s) - English
Resource type - Reports
DOI - 10.2172/920121
Subject(s) - interphase , viscosity , ethylene glycol , monolayer , approx , materials science , analytical chemistry (journal) , surface tension , chemistry , polymer chemistry , composite material , mineralogy , thermodynamics , nanotechnology , chromatography , organic chemistry , physics , genetics , computer science , biology , operating system
Drainage of water from the region between an advancing probe tip and a flat sample is reconsidered under the assumption that the tip and sample surfaces are both coated by a thin water 'interphase' (of width {approx}a few nm) whose viscosity is much higher than the bulk liquid's. A formula derived by solving the Navier-Stokes equations allows one to extract an interphase viscosity of {approx}59 KPa-sec (or {approx}6.6x10{sup 7} times the viscosity of bulk water at 25C) from Interfacial Force Microscope measurements with both tip and sample functionalized hydrophilic by OH-terminated tri(ethylene glycol) undecylthiol, self-assembled monolayers
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