均匀电场作用下的反弯折驻极体效应
Inverse flexoelectret effect: bending dielectrics by a uniform electric field
摘要：
非常希望发现一种机电耦合，其允许介电材料响应于均匀电场而产生曲率，这将为设计致动器增加新的自由度。挠曲电性，极化和应变梯度之间的双向耦合，是一个很好的候选者。但由于其固有的尺寸依赖性，其应用通常仅限于纳米尺度。在这里，在硅橡胶中引入逆挠曲驻极体效应来克服这一限制。基于这个想法，一个弯曲的致动器，可以产生大的曲率在毫米长度尺度的制造和显示具有优异的致动性能与当前的纳米级挠曲电致动器。理论分析表明，这一现象是驻极体和麦克斯韦应力相互作用的结果。这项工作开辟了一条途径，应用宏观挠曲电致动器和柔性电子。
英文摘要：
It is highly desirable to discover an electromechanical coupling that allows a dielectric material to generate curvature in response to a uniform electric field, which would add a new degree of freedom for designing actuators. Flexoelectricity, a two-way coupling between polarization and strain gradient, is a good candidate. But its applications are usually limited to the nanoscale due to its inherent size dependence. Here, an inverse flexoelectret effect in silicone elastomers is introduced to overcome this limitation. Based on this idea, a flexing actuator which can generate large curvature at the millimeter length scale is fabricated and shown to have excellent actuation performance comparable with current nanoscale flexoelectric actuators. Theoretical analysis indicates that the new phenomenon originates from the interplay of electrets and Maxwell stress. This work opens an avenue for applying macroscopic flexoelectricity in actuators and flexible electronics.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
