Abstract
Nanocrystals of CdSe have been produced in an thin film matrix by thermal vacuum evaporation of SiO and CdSe. A new way of forming CdSe nanoclusters in the matrix has been used. The average size of the CdSe nanocrystals, between 2.4 nm and 6.0 nm, has been estimated from the (110) maximum in the x-ray diffraction spectra. Quantum size increase of the optical bandgap of the CdSe nanocrystals has been observed. A good coincidence between the average size of the nanocrystals calculated from the observed bandgap increase and x-ray diffraction measurement has been obtained. The substructure observed in the nanocrystal absorption can be related to relatively small nanocrystal size fluctuations around the average size.
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