Abstract
The electrochemical activity of [open quotes]as grown[close quotes] boron-doped polycrystalline diamond thin film electrodes has been studied using cyclic voltammetry, chronoamperometry, and ac impedance without external illumination. The resistivity of these materials after doping is ca. 10 ohm-cm. The diamond electrodes possess a low double layer capacitance and a relatively high polarization resistance toward surface oxidation. Slow electrode kinetics are observed for Fe(CN)[sub 6][sup 3[minus]/4[minus]] at the [open quotes]as grown[close quotes] surface; however, the electrode response was observed to be extremely stable over a 2-month period as compared with freshly polished glassy carbon. The results suggest that diamond electrodes may have suitable properties as an electrode material for use in electroanalysis. 30 refs., 8 figs., 4 tabs.
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