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. 2014 Mar 11;7(3):2044–2061. doi: 10.3390/ma7032044

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© 2014 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).

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Figure 11. — (a) Schematic diagram of device operation for the ZnO nanowire-based nanogenerator grown on the flexible polyester; (b) piezoelectric potential and (c) piezoelectric current measured from Ag-doped ZnO nanowires (red line) and un-doped ZnO nanowires, respectively, (black line) on polyester substrates using sound waves; (d) OFF-state of the PDLC device; (e) ON-state of the PDLC device after generating sound waves. Reprinted with permission from [47]. Copyright 2013 Royal Society of Chemistry.