Photochemical modification of diamond surfaces
1996
Photochemical and thermal surface modifications of diamonds powders and (100), (110), and (111) oriented single crystals were achieved. Clean, hydrogen-terminated diamond was chlorinated by heating in Cl{sub 2}(g) or by UV irradiation in Cl{sub 2}(g). The surface chlorine titer was shown to correlate with the dangling bond density on the single-crystal faces. Aminated diamond was produced by irradiating the chlorinated diamond in NH{sub 3}(g). Surface nitrogen loading correlated with the dangling bond density. The structural features of the amine-terminated surface led to a decrease in the vibrational frequencies of the surface amine groups. 11 refs., 10 figs., 4 tabs.
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