Optical properties of Zn1−xMgxO nanorods using catalysis-driven molecular beam epitaxy |
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| Authors: | Y W Heo M Kaufman K Pruessner D P Norton F Ren M F Chisholm P H Fleming |
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| Affiliation: | a Department of Materials Science and Engineering, University of Florida, P.O. Box 116400, Rhines Hall, Gainesville, FL 32606, USA;b Department of Chemical Engineering, University of Florida, Gainesville, FL 32606, USA;c Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, TN 37831, USA |
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| Abstract: | We report on the optical properties of (Zn,Mg)O nanorods grown by catalyst-driven molecular beam epitaxy. The process is site-specific, as single crystal (Zn,Mg)O nanorod growth is realized via nucleation on Ag films or islands that are deposited on a SiO2-terminated Si substrate surface. Growth occurs within a flux of Zn, Mg, and O2/O3 mixture at substrate temperatures of 400–500 °C. With the addition of Mg, the nanorod morphology becomes more uniform relative to the pure ZnO nanomaterials synthesized under similar conditions. The (Zn,Mg)O nanorods are cylindrical, exhibiting diameters of 15–40 nm and lengths in excess of 1 μm. The (Zn,Mg)O nanorods exhibit a strong photoluminescence response, showing a slight shift to shorter wavelengths due to Mg incorporation. |
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| Keywords: | ZnMgO Nanorods Photoluminescence Molecular beam epitaxy |
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