Diffuse reflectance infrared Fourier-transform study of the plasma hydrogenation of diamond surfaces

Plasma hydrogenation of diamond surfaces was investigated using a diffuse reflectance infrared Fourier-transform (DRIFT) technique. Hydrogenation was carried out under microwave plasma conditions similar to those used for the chemical vapour deposition of diamond. Surface species chemisorbed on the diamond surface were characterized by DRIFT spectroscopy. The number of hydrogen–carbon bonds increased and the structure of the chemisorbed species on the diamond surfaces changed on increasing the temperature of the plasma hydrogenation.