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Does Exceptional Viscous Drag Impede Flow Through a Nano-Sieve's Pores?

Published online by Cambridge University Press:  01 February 2011

Peter J. Feibelman  and
J. E. Houston
Peter J. Feibelman
Affiliation:
pjfeibe@sandia.gov, Sandia National Laboratories, Surface and Interface Sciences, Mail Stop 1415, Albuquerque, NM, 87185-1415, United States, 505-844-6706, 505-844-5470
J. E. Houston
Affiliation:
jehoust@sandia.gov, Sandia National Laboratories, Surface and Interface Sciences, Mail Stop 1415, Albuquerque, NM, 87185-1415, United States
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Abstract

To address the concern that a material functionalized to reject dissolved ions may give rise to a highly viscous aqueous interphase within nanometers of its surface, we conducted and interpreted Interfacial Force Microscope measurements of the dissipative forces that resist motion of a tip parallel to a sample, in water. The results are consistent with earlier measurements where the tip approached the sample. They confirm that near hydrophilically functionalized surfaces, interphase viscosities more than a million times that of bulk water can be expected.

Keywords

fluidicsporosityscanning probe microscopy (SPM)
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 930: Symposium JJ – Materials Science of Water Purification , 2006 , 0930-JJ04-06
Copyright
Copyright © Materials Research Society 2006

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