Abstract

ABSTRACTThe structure and chemistry of annealed and oxygen or hydrogen-terminated low-index (100, 110) diamond surfaces was determined with high resolution electron energy loss spectroscopy (HREELS), low energy electron diffraction (LEED) and other techniques. HREELS revealed carbonyl, hydroxyl and bridge-bonded oxygen groups on oxidized C(100) and C(110) surfaces. The surface chemistry was correlated with secondary electron emission spectra and other data. The oxidized and annealed (reconstructed) surfaces exhibited larger work functions and electron affinity than hydrogenated surfaces, which we attribute to both band-bending and dipole layer effects due to surface oxygen.

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