Nanotechnology Nanotechnology V 1505Photoluminescence and Infrared Properties of α-Al 2 O 3 Nanowires and Nanobelts.α-Al 2 O 3 nanowires and nanobelts are synthesized from Al pieces and SiO 2 nanoparticles without any other catalyst at 1200°C and 1150°C, respectively, in a fast heating process (flowing Ar atmosphere, 2 h). Photoluminescence measurements under excitation at about 255 nm show that the nanowires and nanobelts have emission peaks at 394 and 392 nm, respectively. These α-Al 2 O 3 nanostructures may possibly be used as reinforcement in composites.The nanobelts are flat and therefore have high specific surface area, which is an important feature for low-cost layer-forming elements in composites. Such coatings are likely to improve the tribological properties of composites. A further common use of single-layer nano-thin films is in the production of antireflection coatings. -(PENG*, X. S.; ZHANG, L. D.; MENG, G. W.; WANG, X. F.; WANG, Y. W.; WANG, C. Z.; WU, G. S.; J.
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