Stick or Slip ?: Measuring slip lengths with nm resolution
ORAL
Abstract
Fluid dynamics within small channels draws great interest due to the development of microfluidic devices, yet details about flow immediately at a solid surface remain too vague. Previous attempts to measure surface flow rate were limited to a resolution of the optical wavelength. Here, by using a fluorescence resonance energy transfer (FRET) approach, we improve the resolution by 1-2 orders of magnitude. Two different flow systems, hydrodynamic flow and electrokinetic flow, were investigated with this technique.
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Authors
Sung Chul Bae
Departments of Materials Science and Engineering, of Chemistry, and of Physics, University of Illinois
Stephen Anthony
Department of Chemistry, UIUC
Steve Granick
University of Illinois Urbana-Champaign
Materials Research Laboratory, UIUC
Department of Materials Science \& Engineering, University of Illinois, 1304 W. Green St., Urbana, IL 61801
