ELECTROCHEMICAL CHARACTERISTICS BORON-DOPED POLYCRYSTALLINE DIAMOND FILM ELECTRODES

The electrochemical characteristics of boron-doped polycrystalline dia mond thin film electrodes with 4 x 4 mm(2) in size have been studied u sing cyclic voltammetry and a potentiostatic method. The diamond elect rode exhibits adequate electrochemical activity and the response curre nt changes linearly with the K3Fe(CN)(6) concentrations. The response current is proportional to the square root of the scan rate, reflectin g the mass transport controlled by planar diffusion. Stable mass trans port was quickly established within 4 s. Good stability and reproducib ility are attractive properties of the diamond electrode for sensor ap plications.