N. Buatip, T. Auzelle, P. John, S. Rauwerdink, M. Sodhi, M. Salaün, B. Fernandez, E. Monroy, D. Mornex, C. R. Bowen and R. Songmuang*,
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引用次数: 0
Abstract
In this study, a detailed analysis of the direct piezo-response of AlN nanowire-based vertically integrated nanogenerators (VINGs) is undertaken as a function of mechanical excitation frequency. We show that the piezo-charge, piezo-voltage, and impedance measured at the same position of the devices can be directly correlated through an equivalent circuit model in the whole frequency range of investigation. Our presented results are utilized to determine the performance figures of merit (FoM) of nanowire-based VINGs, namely, the piezoelectric voltage constant (g) for sensing and the product d · g for energy harvesting, where d is the piezoelectric charge constant. By comparison of these metrics with those of freestanding single-crystal GaN and quartz substrates as well as sputtered AlN thin films, we suggest that the nanowires can outperform their rigid counterparts in terms of mechanical sensing and energy generation. This work provides experimental guidelines for understanding the direct piezo-characteristics of VINGs and facilitates a quantitative comparison between nanostructured piezoelectric devices fabricated by using different materials or architectures.
期刊介绍:
ACS Applied Nano Materials is an interdisciplinary journal publishing original research covering all aspects of engineering, chemistry, physics and biology relevant to applications of nanomaterials. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important applications of nanomaterials.