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1 nano-step closer to weighing a single atom
Date:7/27/2009

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"Previous measurements of nanomechanical damping have primarily focused on devices where only one- or two-dimensions are nanoscale, such as long nanowires. Our measurements and calculations provide insight into how energy is dissipated in devices that are truly nanoscale in all three-dimensions," says Professor Sader.

Illuminating these bipyramidal nanoparticle systems with an ultra-fast laser pulse, set them vibrating mechanically at microwave frequencies. These vibrations were long-lived and for the first time damping in these nanoparticle systems could be interrogated and characterized.

Moreover, the researchers separated out the portion of damping that is due to the material itself and that surrounding liquid for which they developed a parameter-free theoretical model that quantitatively explains this fluid damping.


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Contact: Nerissa Hannink
nhannink@unimelb.edu.au
61-383-448-151
University of Melbourne
Source:Eurekalert

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