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Journal of Advanced Ceramics

, Volume 8, Issue 2, pp 153–173 | Cite as

Flexoelectric materials and their related applications: A focused review

  • Longlong ShuEmail author
  • Renhong Liang
  • Zhenggang Rao
  • Linfeng Fei
  • Shanming KeEmail author
  • Yu Wang
Open Access
Review
  • 147 Downloads

Abstract

Flexoelectricity refers to the mechanical-electro coupling between strain gradient and electric polarization, and conversely, the electro-mechanical coupling between electric field gradient and mechanical stress. This unique effect shows a promising size effect which is usually large as the material dimension is shrunk down. Moreover, it could break the limitation of centrosymmetry, and has been found in numerous kinds of materials which cover insulators, liquid crystals, biological materials, and semiconductors. In this review, we will give a brief report about the recent discoveries in flexoelectricity, focusing on the flexoelectric materials and their applications. The theoretical developments in this field are also addressed. In the end, the perspective of flexoelectricity and some open questions which still remain unsolved are commented upon.

Keywords

flexoelectricity strain gradient electric polarization dielectric constant liquid crystals sensors and actuators 

Notes

Acknowledgements

This work was supported by the National Natural Science Foundation of China under Grant Nos. 11574126 and 11604135, and partly by the Natural Science Foundation of Jiangxi Province (No. 20161BAB216110), China Postdoctoral Science Foundation (No. 2017M612162), and Postdoctoral Science Foundation of Jiangxi Province (No. 2017KY02).

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Authors and Affiliations

  1. 1.School of Materials Science and EngineeringNanchang UniversityNanchangChina
  2. 2.Jiangxi Key Laboratory for Two-dimensional Materials and Devices, and Jiangxi Engineering Laboratory for Advanced Functional Thin FilmsNanchang UniversityNanchangChina

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