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December 01, 2008

Double to Triple the Energy Harvesting from Nanoscale Piezoelectrics

Dramatic enhancement in energy harvesting for a narrow range of dimensions in piezoelectric nanostructures around the critical size of 20-23 nanometer thick beams.

Lead zirconate titanate (PZT) material employed in the form of cantilever beams, our results indicate that the total harvested power peak value can increase by 100% around 21 nm beam thickness (under short circuit conditions) and nearly a 200% increase may be achieved for specifically tailored cross-section shapes. The key (hereto undiscovered) insight is that the striking enhancement in energy harvesting is predicted to rapidly diminish (compared to bulk) both below and above a certain nanoscale structural length thus providing a rather stringent condition for the experimentalists.






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