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Effects of Flexoelectricity and Strain Gradient on Bending Vibration Characteristics of Piezoelectric Semiconductor Nanowires by Minghao Zhao; Jianan Niu; Chunsheng Lu; Bingbing Wang; Cuiying Fan is a Physics and Astronomy article available to read on EtoBox.

What is Effects of Flexoelectricity and Strain Gradient on Bending Vibration Characteristics of Piezoelectric Semiconductor Nanowires about?

In this paper, the governing equation of a piezoelectric semiconductor (PSC) is derived after a consideration of flexoelectricity and the strain gradient effect. A one-dimensional first-order beam model is obtained through integration across its section. Based on this model, theoretical analysis is carried out for a cantilever PSC nanowire subjected to a time-harmonic transverse shear force. The effects of flexoelectricity and the strain gradient on bending vibration characteristics are investigated, including the natural frequencies and distributions of physical quantities. The results show that the strain gradient effect on the natural frequency and stiffness of a PSC nanowire is greater than that of flexoelectricity, while with regard to the influence on electric potential and carrier concentration, the reverse is true. Our findings shed light on the design and optimization of PSC devices such as energy harvesters at the nanoscale.

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Author

Minghao Zhao; Jianan Niu; Chunsheng Lu; Bingbing Wang; Cuiying Fan

Publisher

AIP Publishing

Published

2021

Language

EN

Field

Physics and Astronomy (Physical Sciences)