Fabrication, Structural Characterization and Optical Properties of the Flower-Like ZnO Nanowires |
| L. Feng, A. Liu, Y. Ma, M. Liu and B. Man
College of Physics and Electronics, Shandong Normal University, Jinan 250014, P.R. China |
| Received: January 10, 2010; In final form: March 5, 2010 |
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| Multipod flower-like zinc oxide (ZnO) nanowires have been successfully synthesized on Si(111) substrates using a pulsed laser deposition prepared Zn film as "self-catalyst" by the simple thermal evaporation oxidation of the metallic zinc powder at 850°C without any other catalysts or additives. The pre-deposited Zn films by pulsed laser deposition on the substrates can promote the formation of the ZnO nuclei effectively. Also it can further advance the growth of the flower-like ZnO nanowires accordingly. X-ray diffraction, scanning electron microscope, high-resolution transmission electron microscopy, Fourier transform infrared spectrum, and photoluminescence were used to analyze the structure, morphology, composition and optical properties of the as-synthesized products. The results demonstrate that the nanowires were single crystalline with hexagonal wurzite structure, grown along the [0001] in the c-axis direction. Room temperature photoluminescence spectrum of the ZnO nanowires shows a nearband-edge ultraviolet emission (peak at ≈ 384 nm) and a deep-level green emission (peak at ≈ 513 nm). In addition, the growth mechanism of the flower-like ZnO nanowires is discussed in detail. |
| DOI: 10.12693/APhysPolA.117.512 PACS numbers: 81.07.Bc, 81.05.Dz, 81.10.Aj |