A finite element model is proposed permitting prediction of elastic wave bandgaps periodic composite microplates incorporating flexoelectric effect. In this model, we applied curvature-based flexoelectricity and Mindlin plate theories derived a formulation that has been implemented for bandgap analysis. The utilizes three-node triangle with 30 degrees freedom satisfying kinematics assumptions. ...

The past decade has witnessed the tremendous scientific and technological potential of nanoscale flexoelectricity in solids. flexoelectric effect describes universal generation electric polarization response to strain gradients could be inversely enhanced at reduced dimensions. Based on this unique scaling effect, shown exciting physical phenomena, promising novel electronic, electromechanical,...

for an Invited Paper for the MAR09 Meeting of The American Physical Society Flexoelectricity in nanostructures PRADEEP SHARMA, University of Houston Crystalline piezoelectric dielectrics electrically polarize upon application of uniform mechanical strain. Inhomogeneous strain, however, locally breaks inversion symmetry and can potentially polarize even non-piezoelectric (centrosymmetric) dielec...

The bending-induced polarization of barium titanate single crystals has been measured with an aim to elucidate the origin of the large difference between theoretically predicted and experimentally measured flexoelectricity in this material. The results indicate that part of the difference is due to polar regions (short-range order) that exist above T(C) and up to T*≈200-225 °C. Above T*, howeve...

In view of the well-established charge and dipolar asymmetry of the two leaflets of a native membrane, the theory of flexoelectricity (and curvature elasticity) is extended to take into account this asymmetry using linear and nonlinear forms of the Poisson-Boltzmann equation. The results are discussed with respect to data from atomic force microscopy studies of electromotility in biomembranes.

in order to do in vitro fertilization (ivf), 435 oocytes were collected from 20 super ovulated nmri female mice, in m2 media with 4% bsa. 85% (n=370) of collected oocytes were in mii phase. epididymal sperms were added to 332 oocytes in t6 media drops with 4% bsa and incubated. fertilization rate was 79.8% (n=265) out of which 27.5% (n=73) grew to morula and 20.8% (n=55) achieved blastocyst sta...

Atomic force microscopy typically relies on high-resolution high-bandwidth cantilever deflection measurements based control for imaging and estimating sample topography and properties. More precisely, in amplitude-modulation atomic force microscopy (AM-AFM), the control effort that regulates deflection amplitude is used as an estimate of sample topography; similarly, contact-mode AFM uses regul...