混合压电纳米发电机的动态渐近均匀化表征
Characterization of hybrid piezoelectric nanogenerators through dynamic asymptotic homogenization
摘要：
在柔性/可拉伸电子产品中应用的能量清除框架中，研究了由氧化锌纳米棒制成的混合压电纳米发电机，嵌入聚合物基质中，并在柔性聚合物支撑物上生长。ZnO纳米棒以簇状排列，形成几乎规则的分布，因此可以实际地假设周期性拓扑结构。重点是一个动态的多场渐近均匀化方法，提出把握这种复杂的microstructcures的整体本构行为。一组应用程序，无论是在静态和动态的政权，提出了探索不同的设计范式，相关的纳米发电机的基础上的三个工作原理。延伸和弯曲的纳米发电机，事实上，分析，考虑沿纳米棒轴的延伸，或正交于it. The波的传播的研究，也是利用了解这种压电器件的动态制度的主要特点。
英文摘要：
In the framework of energy scavenging for applications in flexible/strechable electronics, hybrid piezoelectric nanogenerators, made up with Zinc oxyde nanorods, embedded in a polymeric matrix, and growth on a flexible polymeric support, are investigated. The ZnO nanorods are arranged in clusters, forming nearly regular distributions, so that periodic topologies can be realistically assumed. Focus is on a dynamic multi-field asymptotic homogenization approach, proposed to grasp the overall constitutive behaviour of such complex microstrutcures. A set of applications, both in static and dynamic regime, is proposed to explore different design paradigms, related to nanogenerators based on three working principles. Both extension and bending nanogenerators are, indeed, analysed, considering either extension along the nanorods axis, or orthogonally to it. The study of the wave propagation is, also, exploited to comprehend the main features of such piezoelectric devices in the dynamic regime.
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