Flexoelectric enhanced film for an ultrahigh tunable piezoelectric-like effect

Ji, Hui; Zhang, Shuwen; Liu, Kaiyuan; Wu, Tonghui; Li, Shuaijun; Shen, Hao; Xu, Minglong

doi:10.1039/d2mh01089e

Cited by 13 publications

(9 citation statements)

References 54 publications

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“…A direct electric field 3 MV m −1 , is applied through the top and bottom electrodes to the composite and is kept for a certain poling time, t p , typically until the sample cools to room temperature. The experimental poling method also can be seen from our previous work [19][20][21]. To get a better understanding of this composite material, the TEM (Talos L120C, Thermo Fisher Scientific) and FITR (Bruker VERTEX70) test are conducted to evaluate the electret films composite characterization, as seen in appendix of figure A2.…”

Section: Electromechanical Coupling Proceduresmentioning

confidence: 99%

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A mechanical manipulated electromechanical coupling design with stretchable electret film: mechanical sensing, energy harvesting, and actuation

Tian,

Li,

et al. 2024

Smart Mater. Struct.

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Electrical and mechanical energy converts around the nature, and electromechanical coupling effect is applied in various conditions such as mechanical sensing, electrical actuation, and self-powering. During the energy type conversion, electromechanical parameters are among the key issues, such as enlarging the sensitivity and range of mechanical sensing, and energy harvesting efficiency. In this work, a mechanical manipulated approach with stretchable electret is proposed to continuously manipulate the electromechanical parameters. An electromechanical coupling demonstration with pre-stretched electret films and non-contact electrodes are applied, verifying high and regulable electromechanical coupling parameters, and it is advantaged from large deformable and overload permissible capability. This mechanical manipulation approach proposes a new possibility on simplifying the structural and mechanical design of various electromechanical devices, and further enhancing the general applicability with certain geometry and material with ultra-high and tunable electromechanical coupling parameters.

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Section: Electromechanical Coupling Proceduresmentioning

confidence: 99%

“…The mechanical and dielectric properties of the material could be found in our previous work [14,19,21]. The pre-stretch level is applied and discussed.…”

Section: Mechanical Sensing and Energy Harvestingmentioning

confidence: 99%

A mechanical manipulated electromechanical coupling design with stretchable electret film: mechanical sensing, energy harvesting, and actuation

Tian,

Li,

et al. 2024

Smart Mater. Struct.

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“…The flexoelectric effect is expected in high-resolution sensing and actuation applications due to multiple advantages, such as its strong size dependence and being unrestricted from Curie temperatures [27,28]. These characteristics allow flexoelectricity to have immense flexibility and prospects in material and device design, such as force and displacement sensors used under high-temperature conditions [29]. The combination of QZS structure and flexoelectricity can potentially serve as a passive and absolute position sensor in complex environments, which is challenging to accomplish with laser displacement meters [30], strain gauges [31], and linear variable displacement transducers [32].…”

Section: Introductionmentioning

confidence: 99%

Displacement sensing with quasi-zero stiffness structure and flexoelectricity

Gu¹,

Ji²,

Zhang³

et al. 2023

Smart Mater. Struct.

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Flexoelectricity is a strain-gradient-induced electromechanical coupling effect promising for high-resolution sensing. A novel displacement sensing method is developed based on long-range quasi-zero stiffness and flexoelectricity. The structure of curved beams is geometrically designed by optimizing the mechanical and flexoelectric responses. For the optimal configuration, the predicted load-displacement properties and flexoelectric polarization obtained based on finite element analyses agree well with experimental observations. Within the quasi-zero stiffness range, the exported flexoelectric charge shows significant linearity to structure deformation. This study contributes a novel approach for displacement sensing with the combination of quasi-zero stiffness and flexoelectricity, providing insights into applications of flexoelectricity in functional materials and structures.

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“…The current study of flexoelectricity in solid dielectrics has been applied on its mechanism, coefficients, strain gradient design * Author to whom any correspondence should be addressed. approach and electromechanical efficiency enhancement [12][13][14][15][16][17][18][19][20][21][22]. Based on the above researches, the applications of flexoelectricity in solids and elastomeric polymers has been developed in applications of mechanical sensing, actuating, signal storage and energy harvesting [23][24][25][26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Shear flexoelectricity of alcoholic liquids with low viscosity

Zhang

Liu

et al. 2023

J. Phys. D: Appl. Phys.

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Flexoelectricity in solid dielectric materials has been researched and adopted in applications due to its advantages of size-dependence, non-limitation of temperature, and wide range of material selections and mechanical designs. Flexoelectricity in dielectric liquids are also important with its advantages, but little researches have been applied due to the absence of theory and experimental methods. In this work, a series of alcoholic liquids with low viscosity values are theoretically predicted and experimentally verified, which is manipulated by the relative permittivity, initial dipole moment density, value, and length of liquids. This work reveals the micro-scale electromechanical procedure of shear flexoelectricity on liquid alcoholics and helps predicting the flexoelectric responses of dielectric liquids with low viscosity.

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Flexoelectric enhanced film for an ultrahigh tunable piezoelectric-like effect

Abstract: Recent advancements in electromechanical coupling effects enable the electromechanical materials in soft and stretchable formats, offering unique opportunities for biomimetic applications. However, high electromechanical performance and mechanical elasticity hardly coexist...

Cited by 13 publications

References 54 publications

A mechanical manipulated electromechanical coupling design with stretchable electret film: mechanical sensing, energy harvesting, and actuation

A mechanical manipulated electromechanical coupling design with stretchable electret film: mechanical sensing, energy harvesting, and actuation

Displacement sensing with quasi-zero stiffness structure and flexoelectricity

Shear flexoelectricity of alcoholic liquids with low viscosity

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