Viscoelasticity Enhances Nanometer-Scale Slip in Gigahertz-Frequency Liquid Flows
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Date
2021-03-31
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Citation of Original Publication
Debadi Chakraborty, Brian Uthe, Edward W. Malachosky, Matthew Pelton, and John E. Sader, Viscoelasticity Enhances Nanometer-Scale Slip in Gigahertz-Frequency Liquid Flows, J. Phys. Chem. Lett. 2021, 12, 13, 3449–3455, DOI: https://doi.org/10.1021/acs.jpclett.1c00600
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This document is the unedited Author’s version of a Submitted Work that was subsequently accepted for publication in The Journal of Physical Chemistry Letters, copyright © American Chemical Society after peer review. To access the final edited and published work see https://doi.org/10.1021/acs.jpclett.1c00600" http://pubs.acs.org/paragonplus/copyright/jpa_form_a.pdf
This document is the unedited Author’s version of a Submitted Work that was subsequently accepted for publication in The Journal of Physical Chemistry Letters, copyright © American Chemical Society after peer review. To access the final edited and published work see https://doi.org/10.1021/acs.jpclett.1c00600" http://pubs.acs.org/paragonplus/copyright/jpa_form_a.pdf
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Abstract
The interaction between flowing liquids and solid surfaces underpins many physical phenomena and technologies, such as the ability of an airfoil to generate lift and the mixing of liquids for industrial applications. These phenomena are often described using the Navier–Stokes equations and the no-slip boundary condition: the assumption that the liquid immediately adjacent to a solid surface does not move relative to the surface. Herein, we observe violation of the no-slip condition with strong enhancement of slip due to intrinsic viscoelasticity of the bulk liquid. This is achieved by measuring the 20 GHz acoustic vibrations of gold nanoparticles in glycerol/water mixtures, for which the underlying physics is explored using rigorous, theoretical models. The reported enhancement of slip revises current understanding of ultrafast liquid flows, with implications for technologies ranging from membrane filtration to nanofluidic devices and biomolecular sensing.