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7 March 2008 MOCVD growth of ZnO nanostructures using Au droplets as catalysts
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Abstract
ZnO nanostructures were synthesised by Metal Organic Chemical Vapor Deposition growth on Si (100) and c-Al2O3 substrates coated with a 5nm thick layer of Au. The Au coated substrates were annealed in air prior to deposition of ZnO so as to promote formation of Au nanodroplets. The development of the nanodroplets was studied as a function of annealing duration and temperature. Under optimised conditions, a relatively homogeneous distribution of regular Au nanodroplets was obtained. Using the Au nanodroplets as a catalyst, MOCVD growth of ZnO nanostructures was studied. Scanning electron microscopy revealed nanostructures with various forms including commonly observed structures such as nanorods, nanoneedles and nanotubes. Some novel nanostructures were also observed, however, which resembled twist pastries and bevelled-multifaceted table legs.
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V. E. Sandana, D. J. Rogers, F. H. Teherani, R. McClintock, M. Razeghi, H.-J. Drouhin, M. C. Clochard, V. Sallet, G. Garry, and F. Fayoud "MOCVD growth of ZnO nanostructures using Au droplets as catalysts", Proc. SPIE 6895, Zinc Oxide Materials and Devices III, 68950Z (7 March 2008); https://doi.org/10.1117/12.775632
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