Studies on ferrocene organothiol monolayer as an intermediate phase of potentiometric sensors with gold inner contact

Newly designed miniaturized potentiometric ion-selective sensors consisting of silicon-based transducers with Au contact, monolayers of redox-active organothiols and ion-selective polymeric membranes are presented. The purpose of incorporation of self-assembled monolayers is to improve sensors’ EMF stability. The influence of the chemical structure of intermediate layer on the electrochemical characteristics of sensors and the resistance to O2 and CO2 interferences of sensors is described.