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Review | Open Access

Flexoelectric materials and their related applications: A focused review

Longlong SHUa,b( ), Renhong LIANGa, Zhenggang RAOa,b, Linfeng FEIa,b, Shanming KEa,b( ), Yu WANGa,b
School of Materials Science and Engineering, Nanchang University, Nanchang 330031, China
Jiangxi Key Laboratory for Two-dimensional Materials and Devices, and Jiangxi Engineering Laboratory for Advanced Functional Thin Films, Nanchang University, Nanchang 330031, China
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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

flexoelectricitystrain gradientelectric polarizationdielectric constantliquid crystalssensors and actuators

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Journal of Advanced Ceramics
Volume 8 Issue 2,
June 2019
Pages 153-173
DOI: 10.1007/s40145-018-0311-3
Cite this article:
SHU L, LIANG R, RAO Z, et al. Flexoelectric materials and their related applications: A focused review. Journal of Advanced Ceramics, 2019, 8(2): 153-173. https://doi.org/10.1007/s40145-018-0311-3

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Received: 05 December 2018
Accepted: 08 December 2018
Published: 13 June 2019
© The author(s) 2019

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