Diamond has exceptional material properties, including chemical inertness, extreme hardness, a broad range of optical transparency in the IR and UV-visible ranges, and advantageous electrochemical properties when boron-doped. Very few materials are both optically transparent and electrically conductive; this combination makes conductive diamond an attractive electrode material for spectroelectrochemical application. Spectroelectrochemistry is a powerful detection technique coupling electroanalytical and spectroscopic measurement, to quantitatively study in situ chemical concentrations "near" and at an electrode/electrolyte interface. We present here our progress in fabrication and application of conductive, nanocrystalline diamond films as optically transparent electrodes, with specific focus on internal reflection, infrared spectroscopic detection.
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