Shear piezoelectricity was investigated in a series of composites consisting of increased loadings of single-wall carbon nanotubes (SWCNTs) in poly (γ-benzyl-L-glutamate), or PBLG. The effects of the SWCNTs on this material property in PBLG will be discussed. Their influence on the morphology of the polymer (degree of orientation and crystallinity), and electrical and dielectric properties of t...

As a simple model for piezoelectricity we consider a gas of infinitely many non-interacting electrons subject to a slowly time-dependent periodic potential. We show that in the adiabatic limit the macroscopic current is determined by the geometry of the Bloch bundle. As a consequence we obtain the King-Smith and Vanderbilt formula up to errors smaller than any power of the adiabatic parameter.

Abstract In recent years, PVDF(polyvinylidene fluoride) and its copolymers have attracted great attention in the development of energy-harvesting devices because their unique properties such as good flexibility, environmental friendliness, high halogen acid resistance, lightweight biocompatibility. Compared to most commonly used PZT (lead zirconate titanate), piezoelectricity PVDF copolymer-bas...

Monoelemental two-dimensional (2D) materials have attracted significant attention due to their exciting electro-mechanical properties and extreme thinness. However, most of these stable centro-symmetric structures same electronegativities all atoms lack interesting such as piezoelectricity ferroelectricity. Here we report the existence in atomically thin monoelemental α-Tellurium films. DFT cal...