Structural inhomogeneity and piezoelectric enhancement in ZnO nanobelts

Kasra Momeni, Michigan Technological University
Anjana Asthana, Michigan Technological University
Abhishek Prasad, Michigan Technological University
Yoke K. Yap, Michigan Technological University
Reza Shahbazian-Yassar, Michigan Technological University

Abstract

In this work, piezoelectricity of individual ZnO nanobelts grown along the [0∈1∈ī∈0] direction is studied using piezoresponse force microscopy (PFM). It is found that the effective piezoelectric coefficient of these NBs, d 33eff, is increasing from 2.7 pm/V at 30 kHz to 44 pm/V at 150 kHz. The results were explained by the Debye model, where structural inhomogeneity in our NBs was shown to be responsible for piezoelectric enhancement. © 2012 Springer-Verlag.