Flexoelectricity in non-oriented liquids
- 20 November 2020
- journal article
- research article
- Published by IOP Publishing in Journal of Physics D: Applied Physics
- Vol. 54 (6), 06LT01
- https://doi.org/10.1088/1361-6463/abc27f
Abstract
Flexoelectricity is a universal electromechanical effect in dielectric materials, describing strain gradient-induced electric polarization, of which, significant research has been performed for solid dielectrics and liquid crystals. Flexoelectricity of non-oriented liquids may have an impact on the research of bioelectronics, programmed droplets, energy harvesting and ionotronic devices, but it is not accessible for research due to a lack of theory and experimental approaches. In this work, flexoelectricity in non-oriented liquids is theoretically predicted and obtained by applying a shear strain gradient and the flexoelectric response of several types of liquids are demonstrated. Shear strain gradient of liquids is applied with a special-designed geometry and loaded by cyclic rotation from the chamber and the induced electric polarization is measured for flexoelectric coefficients. Experiments are designed and the shear flexoelectric response of non-oriented dielectric liquid materials are theoretically estimated and experimentally verified. This work opens the field of research for flexoelectricity in general non-oriented liquids and highlights the electromechanical properties of liquid materials.Funding Information
- National Natural Science Foundation of China (11672352)
- Post-doctoral Innovation Talent Program of China (BX20200271)
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