COMBINATION OF THE QUARTZ-CRYSTAL MICROBALANCE AND THE ELECTROCHEMICAL TECHNIQUE FOR THE CHARACTERIZATION OF SELF-ASSEMBLED MONOLAYERS OF OCTADECYLMERCAPTAN ON GOLD SURFACES

Quartz crystal microbalance (QCM) technique has been applied to the di rect mass measurement of a self-assembled monolayer of octadecylmercap tan (OM) on a gold surface deposited onto a quartz-crystal. Repeated r insing of the modified electrodes with used solvent was conducted to g et self-assembled monolayers of OM. From the resonance frequency chang e, 2.5 nm molecular occupied area of OM on gold was obtained, The adva ntage of the combination of QCM and electrochemical methods was emphas ized for the characterization of self-assembled monolayers.