Abstract
Cathodoluminescence spectra of clean and oxidized Cu(100) and Ni(100) surfaces, using 60–1000 eV electron bombardment, has been measured. A broad peak at 310 nm has been observed for both clean Cu and Ni surfaces. This peak is attributed to radiative recombination of electrons from the point X' 4 with holes at the point X 5 of the energy band diagram. A narrow peak at 520 nm has been found to correlate with the growth of oxide on the Cu and Ni surfaces. This peak can be attributed to electronic transitions involving energy levels of the O 2- ions. The cathodoluminescence technique appears useful for studying the initial growth of metal oxides.
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