Growth of Highly Oriented ZnO Nanorods by Chemical Vapor Deposition
NATIONAL CHENG KUNG UNIV TAINAN (TAIWAN) DEPT OF CHEMICAL ENGINEERING
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Highly-oriented ZnO nanorods were grown on the fused silica substrates by a thermal CVD technique using Zinc acetylacetonate ZnC5H7O22. The substrate was heated to 500 deg C and the vaporization temperature of ZnC5H7O22 was keep at around 135 deg C. X-ray diffraction and TEM analyses reveal that the nanorods are preferentially oriented toward the c-axis direction. Photoluminescence PL and absorption measurements show a strong emission at around 380nm which corresponds to the near band-edge emission of the bulk ZnO. Moreover, the negligible green emission band in PL spectrum and the absence of E1LO mode of the ZnO crystal in Raman spectrum indicate a low concentration of oxygen vacancy in the highly-oriented ZnO nanorods.
- Inorganic Chemistry