Voltammetric study of a cupric hexacyanoferrate monolayer immobilized on mixed dodecanethiol-glutathione self-assembled monolayer modified gold electrode

Mixed dodecanethiol-glutathinone self-assembled monolayers (DDT-GSH) were p repared on a gold electrode and further derivatized to form a monolayer of cupric hexacyanoferrate (CuHCF). Electrochemical behavior of the modified e lectrode was investigated by cyclic voltammetry. This inorganic monolayer m odified electrode is electroactive and its surface concentration is 4.2 x 1 0(-10) mol cm(-2). Tt is observed that this modified electrode shows select ivity to potassium ion and exhibits an ideal Nernstian response with a slop e of 60 mV/decade to potassium ions in the range from 10(-2) to 1.0 mol L-1 .