Hydrogenated nanodiamond films consisting of 300 and grain sizes were examined by high resolution electron energy loss spectroscopy. C–H stretching modes were identified at 350, 360, and . The mode at was enhanced in the case of grain size and it is stable up to in situ annealing to . Complete hydrogen desorption occurs upon annealing to . Exposure of the nanodiamond film to atomic hydrogen results in a strong quenching of the C–H mode, most likely due to preferential etching of -carbon-hydrogen at the surface and grain boundaries of the films.
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2007
American Institute of Physics
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