Synthesis and characterization of optical transmissive, electrically conductive platinum and platinum oxide semiconductor thin films

The surface of "unprotected" nanoscale platinum clusters (1 similar to 3nm) were modified with PPh3,and the obtained PPh3 - Pt nanoclusters were extra cted into toluene. The resulted colloidal dispersion of the PPh3 - Pt nanoc lusters can spontaneously form homogeneous, optical transmissive thin films on the surface of glass under air. After heated under air at 400 degrees C ,the platinum nanocluster thin films were transformed to optical transmissi ve, electrically conductive platinum oxide semiconductor thin films. The fi lm formation process was followed by UV - vis spectra measurements. The mor phological structure of the films was characterized by using SEM and TEM. T he relationship between the electrical conductivity of the thin films and t he conditions for the film treatments was studied. Changes in the component s of the thin films treated under different conditions were studied try usi ng XPS. It has been revealed that oxygen dissolved in the colloidal solutio n takes an important role in the film formation process of the PPh3 - Pt na noclusters.