Catalyst-free synthesis and luminescence of aligned ZnO nanorods |
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Authors: | Aurangzeb Khan Wojciech. M. Jadwisienczak Henryk. J. Lozykowski Martin E. Kordesch |
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Affiliation: | aDepartment of Physics and Astronomy and CMSS Program, Ohio University, Athens, OH 45701, USA;bSchool of Electrical Engineering and Computer Science, Ohio University, Athens, OH 45701, USA |
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Abstract: | Quasi-aligned undoped ZnO nanorods with diameter in the range 100–300 nm and length of several micrometers have been grown catalyst-free on Si(1 0 0) wafer in a one-step process by direct heating of Zn powders. All nanowires are single crystals and are aligned vertically to the substrate surface with c-axis preferred orientation. XRD, HRTEM and Raman studies revealed that the ZnO nanorods have wurtzite phase, are highly crystalline and well aligned with the lattice parameters a=0.32 nm and c=0.52 nm. The PL spectra measured at different temperatures are dominated by excitonic emission at 380 nm and less intense below band gap emission band centered at 520 nm. |
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Keywords: | Zinc oxide Nanorods Microscopy Luminescence |
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