SIMULTANEOUS UV-VISIBLE SPECTROELECTROCHEMICAL AND QUARTZ-CRYSTAL MICROGRAVIMETRIC MEASUREMENTS DURING THE GROWTH OF POLY(1-NAPHTHYLAMINE) FILM

Piezoelectric fibre optic reflection spectroelectrochemistry (SEC), a new technique of SEC in combination with quartz crystal microbalance ( QCM) detection by using a fibre optic bundle, is proposed. The simulta neous measurements have been performed during the growth of polynaphth ylamine film on the platinum electrode of the QCM in acetonitrile. Res ults show that this technique can provide substantial in situ informat ion of the electrochemical process from SEC and QCM. This novel techni que is recommended to find wider applications in the electrochemical s tudy on surface phenomena. In addition, a pH fibre optic sensor based on the polynaphthylamine film as a sensitive membrane is developed.