Interaction of Thermally Activated and Molecular Oxygen with Hydrogenated and Hydrogen-Free Diamond Film Surfaces: Chemical Reactivity and Electron Emission Properties

Photon stimulated desorption of hydrogen from diamond surfaces via core-level excitations: fundamental processes and applications to surface studies

“…The existence of such a process was proved by high resolution electron energy loss spectroscopy measurements [45][46][47][48]. This reaction seems to occur in our case as well, as can be deduced from the presence of the 286.6 eV peak in the corresponding NEXAFS spectrum (see curve c in figure 22) due to the C (1s)-π * resonance in C=O (ads), but it is not a dominant process, as it can be concluded on the basis of NEXAFS spectra of oxidized diamond surfaces near the oxygen K edge [49]. (iii) Formation of C-O-H surface bonds.…”

“…It can be observed that the normalized integral intensity of the PSID spectrum taken after exposure of the film to thermally activated oxygen decreases only by ∼20% as compared to the as-hydrogenated surface. Considering that the H + PSID processes are partially due to valence band excitations driven by secondary electrons and that the SEE yield decreases by ∼20% following oxidation [49], it is concluded that the absolute amount of adsorbed hydrogen does not substantially decrease following the interaction of activated oxygen with the hydrogenated surfaces. The question that can be asked at this point is what the bonding configuration is of hydrogen following adsorption of activated oxygen.…”

Chemical Bonding of Fullerene and Fluorinated Fullerene on Bare and Hydrogenated Diamond

“…The purpose of this study is to assess the air stability of the C 60 –diamond interface. Normally, a bare dehydrogenated diamond surface will be partially oxidized by molecular oxygen36–37 and moisture38–39 upon exposure to ambient conditions, and the dangling bonds will be quickly saturated. Thus, very strong and broad CH bands (as well as unresolved OH signals) are observed (see Figure 4 c), which agrees well with previous reports 37–38.…”