OPTICAL-SPECTRA OF A CONDUCTING POLYMER (POLYMETHYL-3-THIOPHENE) AT SEVERAL STAGES OF THE ELECTRODEPOSITION PROCESS

The electrodeposition of polymethyl-3-thiophene on a platinum electrod e was carried out potentiostatically. The variation in optical paramet ers was followed in situ in real time, by modulated ellipsometry at a fixed wavelength. On the contrary, ex-situ spectra were determined by spectroscopic ellipsometry, for doped and undoped films, at several st ages of the film growth. The structure of the film for each stage was observed by atomic force nanoscopy. Nucleation, first monolayer, thin dense fibrous layers and thicker granular layers were successively stu died.