In this paper, we present a nanoelectromechanical oscillator with a single semiconducting zinc oxide nanowire (ZnO) doubly clamped and suspended on two metal electrodes by which the piezoelectric property on the growth of the ZnO nanowire along the c-axis, [0001], is characterized by the resonant frequency shift of the oscillator. We report that the resonance of the nanowire oscillator can be detected in ambient air and the effective piezoelectric coefficient on the growth of a ZnO nanowire along the c-axis, [0001], is significantly larger than that of bulk (0001) ZnO.

No abstract

No abstract

The aim of this paper is to analyze the potential reasons for the safety failure of batteries for new-energy vehicles. Firstly, the importance and popularization of new energy batteries are introduced, and the importance of safety failure issues is drawn out. Then, the composition and working principle of the battery is explained in detail, which provides the basis for the subsequent analysis. Then, the potential impacts of factors such as overcharge and over-discharge, high and low temperature environments, internal faults, and external shocks and vibrations on the safety of the batteries are analyzed. Finally, some common safety measures and solutions are proposed to improve the safety of new energy batteries, in hopes of improving the safety of batteries for new-energy vehicle.