Journal article

On the measurement of relaxation times of acoustic vibrations in metal nanowires

Tuphan Devkota, Debadi Chakraborty, Kuai Yu, Gary Beane, John E Sader, Gregory V Hartland

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | ROYAL SOC CHEMISTRY | Published : 2018

Abstract

The mechanical resonances of metal nanostructures are strongly affected by their environment. In this paper the way the breathing modes of single metal nanowires are damped by liquids with different viscosities was studied by ultrafast pump-probe microscopy experiments. Both nanowires supported on a glass substrate and nanowires suspended over trenches were investigated. The measured quality factors for liquid damping for the suspended nanowires are in good agreement with continuum mechanics calculations for an inviscid fluid that assume continuity in stress and displacement at the nanowire-liquid interface. This shows that liquid damping is controlled by radiation of sound waves into the me..

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University of Melbourne Researchers

Grants

Awarded by US National Science Foundation


Awarded by National Natural Science Foundation of China (NSFC)


Awarded by Science and Technology Innovation Commission of Shenzhen


Awarded by Australian Research Council Centre of Excellence in Exciton Science


Funding Acknowledgements

This work was supported by the US National Science Foundation through grant CHE-1502848. KY acknowledges financial support from the National Natural Science Foundation of China (NSFC) (61705133) and the Science and Technology Innovation Commission of Shenzhen (JCYJ20170818143739628). DC and JES acknowledge support from the Australian Research Council Centre of Excellence in Exciton Science (CE170100026) and the Australian Research Council Grants Scheme.