The topic of this thesis is the electrochemical characterization of oxygen-terminated single-crystal- and nanocrystalline diamond electrodes. Diamond is a very attractive material for bio- and electrochemical applications due to its exceptional stability, its biocompatibility, and its electrochemical properties like wide potential window of water dissociation and low background current. Therefore, diamond electrodes can operate even in harsh environments and under strongly oxidizing conditions, where electrochemical devices based on silicon or metals are corroded. Such applications can be e.g. pH sensing in strong acids and bases or the detection of organic molecules.
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