A PRIMARY STUDY ON THE SYNTHESIS AND CHARACTERIZATION OF ZNS CLUSTERSIN CHITOSAN FILM

A novel process using chitosan containing ligand groups as a medium fo r forming ZnS clusters by an ion-coordination method is investigated f or the first time. The ZnS clusters in the chitosan film have been ide ntified by x-ray diffraction, ultraviolet-visible absorption and photo luminescence spectra. The ZnS cluster size was estimated to be about 2 -6 nm, depending on the processing conditions. Blue luminescence for t he undoped ZnS clusters was observed and its mechanism is briefly disc ussed.