Probing surface structure quality of ZnO nanorods by second harmonic generation

Chung Wei Liu, Shoou Jinn Chang, Chih Hung Hsiao, Ruei Jie Huang, Yan Shen Lin, Min Chia Su, Peng Han Wang, Kuang Yao Lo

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

The surface quality of ZnO nanorod after postannealing was inspected by second harmonic generation (SHG) with the assistance of photoluminescence (PL) spectra, and the X-ray photoelectron (XPS) spectroscopy. The SHG is sensitive to the quality of the surface structure, which involves the elimination of surface defects and restructuring. Oxygen (O)-deficient defects and surface defects were generated during the growth of ZnO nanorods. The PL and XPS analyses indicate that the surface defects on ZnO nanorods were reduced at annealing temperatures above 600^{\circ}{\rm C}. The bulk crystal structure was repaired for higher activation temperatures ({>}{\rm 700}^{\circ}{\rm C}) concluded by X-ray diffraction. Results from SHG revealed the relationship between surface restructuring of ZnO nanorods and annealing temperature.

Original languageEnglish
Article number6740826
Pages (from-to)789-792
Number of pages4
JournalIEEE Photonics Technology Letters
Volume26
Issue number8
DOIs
Publication statusPublished - 2014 Apr 15

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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