Issue 43, 2014

Piezoelectricity of lead-free (K, Na)NbO3 nanoscale single crystals

Abstract

(K, Na)NbO3 (KNN) is a promising lead-free compound that is more suitable for piezoelectric applications requiring environmental or even biological compatibility than the traditional lead-based Pb(Zr, Ti)O3 systems. In this work, we synthesized single crystalline KNN nanorods (NRs) with various K/Na ratios, which were used as ideal specimens for investigating the compositional dependence of piezoelectricity. Piezoresponse force microscopy (PFM) was utilized to characterize the three-dimensional (3-D) morphology and piezoelectric properties of single crystalline KNN NRs. A phase boundary was confirmed around a K/Na ratio of ∼45/55 based on local switching behavior, whereby enhanced piezoresponse in KNN single crystals was obtained with specific domain structures. The methodology demonstrated in this work can also be applied for further fundamental studies on KNN as well as other lead-free piezoelectric materials.

Graphical abstract: Piezoelectricity of lead-free (K, Na)NbO3 nanoscale single crystals

Supplementary files

Article information

Article type
Paper
Submitted
07 8 2014
Accepted
29 8 2014
First published
29 8 2014

J. Mater. Chem. C, 2014,2, 9091-9098

Author version available

Piezoelectricity of lead-free (K, Na)NbO3 nanoscale single crystals

L. Cheng, K. Wang, J. Li, Y. Liu and J. Li, J. Mater. Chem. C, 2014, 2, 9091 DOI: 10.1039/C4TC01745E

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