The effect of mechanical milling on the luminescence properties of ZnO microcrystalline samples has been studied by means of cathodoluminescence in a scanning electron microscope. The samples consisted of pressed pellets of commercially available ZnO powder which were ball milled to investigate the possibility of nanocrystalline ZnO formation. Changes observed in the relative intensities of the characteristic ultraviolet and green band of ZnO are discussed in terms of defects generated during milling. The effect of nano-and picosecond pulsed laser irradiation on the particle size and luminescence of the milled samples has been also investigated.

ZnSe powder has been ball milled in different conditions to investigate the formation of a nanocrystalline structure. The effect of mechanical milling on the luminescent and structural properties of ZnSe has been studied by means of cathodoluminescence (CL) in the scanning electron microscope SEM, high resolution electron microscopy (HRTEM) and X‐ray diffraction (XRD). For the CL measurements the samples were pressed to form disk shaped pellets. Changes observed in the relative intensities of the characteristic emission bands are discussed in terms of defects generated during milling. The crystallinity of milled powders has been studied by HRTEM. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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