The single-crystallined K0.5Na0.5NbO3 (KNN) nanorods were synthesized by hydrothermal process, and then parallel connected by a pair of interdigital Au/Ti electrodes, which were prepared on a flexible substrate by MEMS technique. After PDMS packaging and pre-polarization, the KNN nanorods exhibited high electromechanical conversion property with a stress-induced parallel output voltage up to several tens of millivolts. The voltage output of the KNN nanorods came from the back and forth electron transport in the external circuit driven by a forward piezoelectric potential and a reversed potential induced by the electron accumulation due to the Schottky contact, respectively.
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Wang et al. (2013) studied this question.
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