IDENTIFICATION OF SYNTHETIC METALS FROM THE SHAPE OF THE CARBON KLL SPECTRA BY THE PATTERN-RECOGNITION METHOD

The aim of the work was to verify the possibility of application of Auger electron spectroscopy in connection with the pattern recognition method to study the polymer surfaces. Synthetic metals were chosen for investigation. The carbon KLL spectra were analyzed using the so-called k-nearest neighbor rule. Analysis was performed for polyacetylene and polypyrrole doped with Fe(CN)64- and FeCl44- ions. On the basis of the standard spectra recorded for all polymers the effective recognizing procedure was developed. Notieable changes of spectra were observed on electrochemical removal of dopants. The analysis made after 90 days of ageing in vacuum revealed some spectra changes in doped polymers. These changes made after 90 days of ageing in vacuum revealed some spectra changes in doped polymers. These changes may be due to the disappearance of dopants or to the deposition of contaminants. An electron beam of 300 nA at 1000 ev was found to affect the surface polyacetylene.