When Can the Elastic Properties of Simple Liquids Be Probed Using High-Frequency Nanoparticle Vibrations?
Debadi Chakraborty, Gregory V Hartland, Matthew Pelton, John E Sader
JOURNAL OF PHYSICAL CHEMISTRY C | AMER CHEMICAL SOC | Published : 2018
Recent measurements on the gigahertz vibration of nanoparticles immersed in simple liquids, such as glycerol, show that the liquid's viscoelastic properties can significantly affect the nanoparticle's mechanical response. Here, we theoretically explore the high-frequency (elastic) limit of this phenomenon where the characteristic time scale for molecular relaxation in the liquid far exceeds the nanoparticle's vibration period. Paradoxically, we find that the effects of liquid elasticity (and viscosity) may not be visible in the nanoparticle's dynamic response in this high-frequency elastic limit - the response being identical to that of a macroscopic resonator in an inviscid fluid. A compreh..View full abstract
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Awarded by Australian Research Council Centre of Excellence in Exciton Science
Awarded by US National Science Foundation
Awarded by Division Of Materials Research
This research was supported by the Australian Research Council Centre of Excellence in Exciton Science (CE170100026) and the Australian Research Council Grants Scheme. GVH acknowledges support from the US National Science Foundation through grant CHE-1502848. MP acknowledges support from the US National Science Foundation under grant DMR-1554895.