Nanostructural and piezoelectric characterization of electro-formed δ-phase poly(vinylidene fluoride) thin films

被引：7

作者：

Disnan, Davide ^{[1
]}

Hafner, Jonas ^{[1
]}

Benaglia, Simone ^{[2
]}

Teuschel, Marco ^{[1
]}

Schneider, Michael ^{[1
]}

Garcia, Ricardo ^{[2
]}

Schmid, Ulrich ^{[1
]}

机构：

[1] TU Wien, Inst Sensor & Actuator Syst, Gusshausstr 27-29, A-1040 Vienna, Austria

[2] CSIC, Inst Ciencia Mat Madrid, Madrid, Spain

来源：

MATERIALS RESEARCH LETTERS | 2023年 / 11卷 / 04期

关键词：

PVDF; AFM; nanoscale; delta-phase; piezoelectricity; FERROELECTRIC PROPERTIES; CRYSTAL-STRUCTURE; ALPHA-PHASE; TRANSFORMATION; TRANSITION;

D O I：

10.1080/21663831.2022.2150096

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Ferroelectric polymer PVDF possesses different polymorphs. Solution-processed thin films crystallize mostly into the paraelectric alpha-phase. From alpha-PVDF, the electroactive phases beta-, gamma-, delta-PVDF can be achieved by further treatments. For instance, delta-PVDF, also known as alpha (p)-phase, can be obtained by electro-forming. In this work, we study the alpha-PVDF surface morphology using atomic force microscopy through a high-resolution image at the sub-nanometre scale. We go through the ferro- and piezoelectric properties of the electro-formed delta-PVDF thin films and we present an electro-mechanical characterization in high-fields regime, for studying the non-linear electrostrain behaviour, and in low-fields regime, for extracting the piezoelectric coefficient.

引用

页码：296 / 303

页数：8

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