Large-Area Cylindrical Diamond Electrodes

Abstract

Cylindrical boron-doped diamond (c-BDD) electrodes were prepared onto several substrates materials with areas up to 35 cm2. The deposition of well-adherent diamond films onto the outer surface of cylindrical substrates was performed. Several diameter sizes and different substrates materials were studied. Diamond films adherence was improved by increasing the substrate surface roughness and by pyrolising castor oil or polyaniline polymer on substrate surface to accelerate the formation of diamond initial nuclei. Profilometry and scanning electron microscopy were used respectively to measure roughness of surface and to characterize the morphologies of the diamond films. The residual stress in the diamond films was characterized by Raman spectroscopy with depth series analysis. Voltammetric analysis using c-BDD electrodes were performed in acid media, revealing high quality diamond behavior. © 2012 The Electrochemical Society.