Enhancement of local piezoresponse in polymer ferroelectrics via nanoscale control of microstructure

Title
Enhancement of local piezoresponse in polymer ferroelectrics via nanoscale control of microstructure
Authors
이준석최윤영Pankaj SharmaCharudatta PhatakDavid J GosztolaYunya LiuByeongdu LeeJiangyu LiAlexei GruvermanStephen DucharmeSeungbum Hong
Issue Date
2015-02
Publisher
ACS Nano
Citation
VOL 9, NO 2-1819
Abstract
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.
URI
http://pubs.kist.re.kr/handle/201004/70328
ISSN
1936-0851
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KIST Publication > Article
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