Effect of high-viscosity interphases on drainage between hydrophilic surfaces.

Technical Report · Fri Oct 01 00:00:00 EDT 2004

DOI:https://doi.org/10.2172/920121· OSTI ID:920121

Feibelman, Peter Julian

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.

• Research Organization: Sandia National Laboratories
• Sponsoring Organization: USDOE
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 920121
• Report Number(s): SAND2004-5256
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
DRAINAGE
Fluidic devices.
Hydration.
INTERFACES
Liquid phases.
NAVIER-STOKES EQUATIONS
Nanostructures.
PROBES
SURFACES
Surface chemistry.
THIOLS
VISCOSITY
Viscosity.
WETTABILITY