Oxygen surface studies in ultra-thin diamond using a resonance reaction and transmission channelled Rutherford forward scattering

Polished low-index diamond planes are often taken to be hydrogen terminated . Previous work has shown a partial monolayer of oxygen on the surface. We have made use of the O-16(alpha, alpha)O-16 resonance at 3.045 MeV to study the oxygen on the diamond surface with increased sensitivity. With a metho d fdr producing ultra-thin diamonds, new research in diamond is possible. U ltra-thin diamonds were made by damaging thick diamonds with MeV carbon ion s, annealing the damage out of the surface region leaving a graphitised (Br agg peak) layer below, and electrochemical etching with de-ionised water. T his produced a few mu m thick and a few mm diameter sized samples. Transmis sion channelling, with a 4 MeV alpha-microbeam was used to determine the po sition of the surface oxygen on a (1 0 0) oriented diamond. (C) 1999 Elsevi er Science B.V. All rights reserved.