Viscoelasticity Enhances Nanometer-Scale Slip in Gigahertz-Frequency Liquid Flows
Debadi Chakraborty, Brian Uthe, Edward W Malachosky, Matthew Pelton, John E Sader
JOURNAL OF PHYSICAL CHEMISTRY LETTERS | AMER CHEMICAL SOC | Published : 2021
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 und..View full abstract
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Awarded by U.S. National Science Foundation
Awarded by Australian Research Council Centre of Excellence in Exciton Science
The authors thank Philippe Guyot-Sionnest for supervision of nanoparticle synthesis and Adam Goad for assistance with transient-absorption measurements. M.P. and B.U. acknowledge funding from the U.S. National Science Foundation under Grant DMR-1554895. D.C. and J. E. S. gratefully acknowledge support from the Australian Research Council Centre of Excellence in Exciton Science (CE170100026) and the Australian Research Council Grants Scheme.