Luminescence,vibrational and XANES studies of AlN nanomaterials |
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| Institution: | 1. INFN-Laboratori Nazionali di Frascati, Via E. Fermi 40, 00044 Frascati (RM), Italy;2. Institut Laue-Langevin, 6 rue Jules Horowitz, 38042 Grenoble, France;3. Institute for Solid State Physics, University of Latvia, Kengaraga 8, LV-1063 Riga, Latvia;4. Department of Environmental, Occupational and Social Medicine, University of Rome Tor Vergata, 00133 Rome, Italy;5. Ivan Franko National University of Lviv, Faculty of Electronics, 107 Tarnavskogo str., 79017 Lviv, Ukraine |
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| Abstract: | The paper reports comparative studies on synthesized aluminium nitride nanotubes, nanoparticles and commercially available micron-sized AlN powder using different spectroscopic techniques: cathodoluminescence measurements (CL), X-ray absorption near edge spectroscopy (XANES) and Fourier-transform infrared spectroscopy (FTIR). Crucial distinctions in CL spectra are observed for nano- and microsized aluminium nitride powders; systematic shift of the IR absorption maximum has been detected for nanostructured aluminium nitride as compared to commercial samples. Through XANES experiments on Al K-edge structural differences between nano- and bulk AlN are revealed, intensity of features in absorption spectra has been found to be a function of wurtzite and zincblend phases amount in nanostructured samples. |
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