نتایج جستجو برای: theory of flexoelectricity
تعداد نتایج: 21222136 فیلتر نتایج به سال:
An unexpected type of behavior in electroconvection (EC) has been detected in nematic liquid crystals (NLCs) under the condition of comparable time scales of the director relaxation and the period of the driving ac voltage. The studied NLCs exhibit standard EC (s-EC) at the onset of the instability, except one compound in which nonstandard EC (ns-EC) has been detected. In the relevant frequency...
Flexoelectricity is a coupling between orientational deformation and electric polarization. We present a direct method for measuring the flexoelectric coefficients of nematic liquid crystals (NLCs) via the electric current produced by periodic mechanical flexing of the NLC's bounding surfaces. This method is suitable for measuring the response of bent-core liquid crystals, which are expected to...
in the first part of this thesis we explored wetting and its dynamics for small droplets. first, we showed how a simple feature of water droplets on a surface, i.e. laplace pressure, can be exploited to build a micropump. we investigated capillary pumping in microchannels both experimentally and numerically. putting two droplets of different sizes at the in/outlet of a microchannel, will ge...
This paper develops the equilibrium equations describing flexoelectric effect in soft dielectrics under large deformations. Previous works have developed related theories using a coupling tensor of mixed material-spatial character. Here, we formulate model terms completely defined material frame, with same symmetries small-strain flexocoupling and leading naturally to objective polarization fie...
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