Enhancement of Local Piezoresponse in Polymer Ferroelectrics via Nanoscale Control of Microstructure

Yoon-Young Choi; Pankaj Sharma; Charudatta Phatak; David J. Gosztola; Yunya Liu; Joonseok Lee; Byeongdu Lee; Jiangyu Li; Alexei Gruverman; Stephen Ducharme; Seungbum Hong

doi:10.1021/nn5067232

Enhancement of Local Piezoresponse in Polymer Ferroelectrics via Nanoscale Control of Microstructure

Yoon-Young Choi, Pankaj Sharma, Charudatta Phatak, David J. Gosztola, Yunya Liu, Joonseok Lee, Byeongdu Lee, Jiangyu Li, Alexei Gruverman, Stephen Ducharme, Seungbum Hong

Research output: Contribution to journal › Article › peer-review

70 Citations (Scopus)

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.

Original language	English
Pages (from-to)	1809-1819
Number of pages	11
Journal	ACS Nano
Volume	9
Issue number	2
DOIs	https://doi.org/10.1021/nn5067232
Publication status	Published - 24 Feb 2015
Externally published	Yes

Keywords

ferroelectric polymers
mechanical annealing effect
P(VDF-TrFE)
piezoresponse hysteresis loops

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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.",

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AU - Choi, Yoon-Young

AU - Sharma, Pankaj

AU - Phatak, Charudatta

AU - Gosztola, David J.

AU - Liu, Yunya

AU - Lee, Joonseok

AU - Lee, Byeongdu

AU - Li, Jiangyu

AU - Gruverman, Alexei

AU - Ducharme, Stephen

AU - Hong, Seungbum

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Y1 - 2015/2/24

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AB - 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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KW - piezoresponse hysteresis loops

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Enhancement of Local Piezoresponse in Polymer Ferroelectrics via Nanoscale Control of Microstructure

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Keywords

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