Insights into the Morphotropic Phase Boundary in Ferroelectric Polymers from the Molecular Perspective

Yang Liu; Bing Zhang; Aziguli Haibibu; Wenhan Xu; Zhubing Han; Wenchang Lu; J. Bernholc; Qing Wang

doi:10.1021/acs.jpcc.9b01220

Insights into the Morphotropic Phase Boundary in Ferroelectric Polymers from the Molecular Perspective

Yang Liu, Bing Zhang, Aziguli Haibibu, Wenhan Xu, Zhubing Han, Wenchang Lu, J. Bernholc, Qing Wang

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

8 Scopus citations

Abstract

Significantly enhanced electromechanical responses are inherent to piezoelectric materials at the morphotropic phase boundary (MPB). Here we reveal that conformational competition between the trans-planar and 3/1-helical phases of poly(vinylidene fluoride-trifluoroethylene) P(VDF-TrFE) occurs intramolecularly rather than intermolecularly to induce the formation of MPB. We attribute significantly enhanced piezoelectric properties observed near MPB to the polarization rotation between energetically degenerate trans-planar and 3/1-helical phases. Our results offer design principles to search for new MPB polymers from a molecular perspective.

Original language	English (US)
Pages (from-to)	8727-8730
Number of pages	4
Journal	Journal of Physical Chemistry C
Volume	123
Issue number	14
DOIs	https://doi.org/10.1021/acs.jpcc.9b01220
State	Published - Apr 11 2019

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Energy(all)
Physical and Theoretical Chemistry
Surfaces, Coatings and Films

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10.1021/acs.jpcc.9b01220

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title = "Insights into the Morphotropic Phase Boundary in Ferroelectric Polymers from the Molecular Perspective",

abstract = "Significantly enhanced electromechanical responses are inherent to piezoelectric materials at the morphotropic phase boundary (MPB). Here we reveal that conformational competition between the trans-planar and 3/1-helical phases of poly(vinylidene fluoride-trifluoroethylene) P(VDF-TrFE) occurs intramolecularly rather than intermolecularly to induce the formation of MPB. We attribute significantly enhanced piezoelectric properties observed near MPB to the polarization rotation between energetically degenerate trans-planar and 3/1-helical phases. Our results offer design principles to search for new MPB polymers from a molecular perspective.",

author = "Yang Liu and Bing Zhang and Aziguli Haibibu and Wenhan Xu and Zhubing Han and Wenchang Lu and J. Bernholc and Qing Wang",

note = "Funding Information: We acknowledge the support of ONR (N000141612082 and N000141612459). Publisher Copyright: {\textcopyright} 2019 American Chemical Society.",

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AU - Liu, Yang

AU - Zhang, Bing

AU - Haibibu, Aziguli

AU - Xu, Wenhan

AU - Han, Zhubing

AU - Lu, Wenchang

AU - Bernholc, J.

AU - Wang, Qing

PY - 2019/4/11

Y1 - 2019/4/11

N2 - Significantly enhanced electromechanical responses are inherent to piezoelectric materials at the morphotropic phase boundary (MPB). Here we reveal that conformational competition between the trans-planar and 3/1-helical phases of poly(vinylidene fluoride-trifluoroethylene) P(VDF-TrFE) occurs intramolecularly rather than intermolecularly to induce the formation of MPB. We attribute significantly enhanced piezoelectric properties observed near MPB to the polarization rotation between energetically degenerate trans-planar and 3/1-helical phases. Our results offer design principles to search for new MPB polymers from a molecular perspective.

AB - Significantly enhanced electromechanical responses are inherent to piezoelectric materials at the morphotropic phase boundary (MPB). Here we reveal that conformational competition between the trans-planar and 3/1-helical phases of poly(vinylidene fluoride-trifluoroethylene) P(VDF-TrFE) occurs intramolecularly rather than intermolecularly to induce the formation of MPB. We attribute significantly enhanced piezoelectric properties observed near MPB to the polarization rotation between energetically degenerate trans-planar and 3/1-helical phases. Our results offer design principles to search for new MPB polymers from a molecular perspective.

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Insights into the Morphotropic Phase Boundary in Ferroelectric Polymers from the Molecular Perspective

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