Growth mechanism of ZnO nanostructures for ultra-high piezoelectric d 33 coefficient
A comparative morphological study of different ZnO nanostructures was carried out with different varying process parameters for energy harvesting. Molarity, temperature, growth duration and seed layer were such fundamental controlling parameters. The study brings out an outstanding piezoelectric coefficient (d 33) of 44.33 pm/V for vertically aligned ZnO nanorod structures, considered as the highest reported d 33 value for any kind of ZnO nanostructures. XRD analysis confirms wurtzite nature of this nanorod structure with  as preferential growth direction. Semiconducting characteristic of nanorods was determined with temperature induced I/V characterization.
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Document Type: Review Article
Publication date: December 1, 2013
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