SYNTHESIS AND CHARACTERIZATION OF NANOMETER-SIZED CDS CLUSTERS IN CHITOSAN FILM

A novel process using chitosan containing ligand groups as a medium fo r forming CdS clusters in chitosan films by an ion co-ordinate method has been investigated. The CdS clusters in the chitosan have been iden tified by X-ray diffraction and by their infrared, ultraviolet and vis ible absorption spectra and shown to possess high stability with a spe cific structure. Notable quantum size effects have been shown through their absorption spectra. By changing the reaction conditions, the wav elength edge of the absorption can be blue-shifted from 470 to 375 nm.