Abstract
Zinc oxide nanowires (ZnO-NWs) were deposited by oxidizing Zn powder and characterized by Field Emission Scanning Electron Microscopy (FESEM), photoluminescence, X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) techniques to evaluate its structural, vibrational, optical and chemical composition properties. The FESEM result shows that the length of the ZnO-NWs increases from 2.6 to 5.0 μm respectively, for increasing the O2 flow rate from 40 to 120 sccm with a fixed diameter of 175 nm. The crystallite size and lattice strain of ZnO-NWs are 26.96 nm and 0.00174 to 0.00408 respectively with increasing of O2 flow rate. The deconvoluted photoluminescence spectra indicated four major visible emission band at 394.64, 420.96, 465.29, and 501.43 nm. The phonon lifetime of A1(TO) and E1(TO) decreased with increasing of O2 flow rate. Moreover, the composition of Zn and O are 43 and 57 at. % respectively in the ZnO-NWs for the 100 sccm O2 flow rate.
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