Piezoelectric ZnO Nanorod Arrays by Hydrothermal Reaction

Abstract

ZnO nanorod arrays were grown on Zn substrates by an inexpensive and facile hydrothermal reaction at low temperature of 95°C. 0.1 M ZnCl₂ was used as a precursor was dissolved in 100 ml of deionized water, and 2ml ammonia solution (25%) was added to the solution, it enable easily obtained arrayed ZnO nanorods. Morphology and microstructure of the ZnO nanorods was characterized. Precision impedance analyzer and quasi-static d₃₃ measurer were employed to analyze the micro-area piezoelectric property. The resonant frequency and the piezoelectric constant of ZnO nanorod arrays are 1.09 MHz and 17 pm/V, respectively.

Keywords:

• ZnO nanorod arrays
• hydrothermal reaction
• resonant frequency
• piezoelectric constant

Acknowledgments

The authors thank Miss Xuecong Wang of Technical Institute of Physics and Chemistry of CAS for the aid in SEM analysis, Prof. J. F. Zhao of Technical Institute of Physics and Chemistry of CAS for the aid in Raman analysis, Prof. Guirong Liu of University of Science and Technology Beijing for the aid in XRD analysis. Financial support from Founding Project for Academic Human Resources Development in Institutions of Higher Learning Under the Jurisdiction of Beijing, Program of Beijing Key Lab for Sensor (No. KM20091077207), and Scientific Creative Platform Foundation of Beijing Municipal Commission of Education under Grant No. PXM2008_014224_067420, the Program of Key CaB of Novel Thin Films Solar Cells of CAS under Grant No. KF200907, the Program of Key Laboratory of Photochemical Conversion and Optoelectronic Materials, TIPC, CAS.