Production of B-Doped Diamond Films for use as Inert Electrochemical Electrodes

We have worked on the production of boron-doped CVD diamond films for use as inert electrodes in electrochemical applications, e.g. cyclic voltammetry. Boron doping is achieved using B₂H₆ gas at concentrations of a few 100 ppm in the usual CH₄/H₂ gas mixture. Diamond films can be made with conductivity ranging from highly insulating, through various degrees of semiconductivity, to fully metallic, depending upon the B-doping level we choose.

The hot filament CVD reactor used to prepare B-doped diamond films.