Enhancement of local piezoresponse in polymer ferroelectrics via nanoscale control of microstructure
- Enhancement of local piezoresponse in polymer ferroelectrics via nanoscale control of microstructure
- 이준석; 최윤영; Pankaj Sharma; Charudatta Phatak; David J Gosztola; Yunya Liu; Byeongdu Lee; Jiangyu Li; Alexei Gruverman; Stephen Ducharme; Seungbum Hong
- Issue Date
- ACS Nano
- VOL 9, NO 2-1819
- Polymer ferroelectrics are flexible and lightweight electromechanical materials that are widely studied due to their potential application as sensors, actuators, and energy harvesters. However, one of the biggest challenges is their low piezoelectric coefficient. Here, we report a mechanical annealing effect based on local pressure induced by a nanoscale tip that enhances the local piezoresponse. This process can control the nanoscale material properties over a microscale area at room temperature. We attribute this improvement to the formation and growth of
β-phase extended chain crystals via sliding diffusion and crystal alignment along the scan axis under high mechanical stress. We believe that this technique can be useful for local enhancement of piezoresponse in ferroelectric polymer thin films.
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