Flexoelectricity is an electromechanical coupling between the electric field and mechanical strain gradient, as well strains observed in all dielectric materials, including those with centrosymmetry. demands C1-continuity for straightforward numerical implementation governing equations gradient theory are fourth-order partial differential equations. In this work, alternative collocation-based m...

Non-conductive materials like rubbers, plastics, ceramics, and even semiconductors have the property of flexoelectricity, which means that they can generate electricity when bent twisted. However, an irregular shape or a peculiar load has been necessary condition to realize weight deformability specific ratios flexoelectricity solids are limited. In this work, we develop theoretical model three...

Abstract Semiconducting effects in zinc oxide nanowires‐based nanogenerators greatly impact their performances. A coupled model integrating piezoelectric and semiconducting properties is developed with a finite element method to better understand the phenomena involved this kind of device made process including chemical bath deposition nanostructures polymer encapsulation. Free carriers surface...

The emerging electro-mechanical impedance technology has high potential for in-situ health monitoring and NDE of structural systems and complex machinery. At first, the fundamental principles of the electro-mechanical impedance method are briefly reviewed and ways for practical implementation are highlighted. The equations of piezo-electric material response are given, and the coupled electro-m...

We report on the development of a metrological multiaxis nanopositioning device, which is operated by the piezo-based inertial method, as a sample stage for scanning probe microscopy. It has long moving range, unlimited in principle, and nanometer ~microradian! resolution. Two operation methods, inertial sliding and inertial walking, can be applied to the stage and the inertial operating method...