Apparent Slip at Hydrophilic Surface: Flow Profile within 1 nm from the Surface

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.~ Here, by using fluorescence energy transfer (FRET and fluorescence quenching) approaches, we measured the flow rate of fluorescence quencher molecules within 1 nm from the quartz surface within a specially-designed microfluidic device.~ In parallel, we have simulated the flow dynamics at the surface, in order to separate cleanly the actual near-surface velocity from the confounding effects of near-surface diffusion.~~

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Authors

  • Sung-Chul Bae

  • Stephen Anthony

    • Department of Chemistry, University of Illinois at Urbana-Champaign

  • Steve Granick

    • Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign
    • Departments of Physics, Chemistry, and Materials Science and Engineering, University of Illinois at Urbana-Champaign
    • University of Illinois at Urbana-Champaign
    • Dept. of Materials Science \& Engineering, of Physics, of Chemistry, and of Chemical \& Biomolecular Engineering, UIUC
    • Departments of Materials Science and Engineering, of Chemistry, of Physcis, University of Illinois
    • Department of Materials Science and Engineering, Chemistry, Physics, Chemical Engineering, University of Illinois at Urbana-Champaign
    • UIUC, Materials Science and Engineering Department
    • Department of Materials Science \& Engineering, of Chemistry, of Physics, and of Chemical \& Biomolecular Engineering, UIUC
    • Departments of Chemistry and of Material Science, University of Illinois