Fabrication and structure studies of ZnSe: Cu/polyelectrolytes multilayer films

Cu-doped ZnSe nanocrystals were synthesized in aqueous solution, the optica l properties of which could be controlled accordingly. By the layer-by-laye r self-assembly method, the ZnSe : Cu/polyelectrolytes multilayer film was fabricated successfully, which was characterized by UV-Vis absorption spect ra, XPS and TEM et al,, The surface structure of nanoparticles and the vale nce of copper could be controlled by the surface modification with reflux, indicated by the increasing of fluorescence efficiency and the XPS results. Moreover, the average size of ZnSe : Cu nanocrystals was found to be simil ar to3 nm without obvious aggregation, The films assembled in this way can make brighter luminescence possible.