Abstract
Etch-decoration reveals that the rate of removal of carbon atoms exposed at monolayer steps on graphite surfaces depends on the population density of these edge atoms (the rate is higher at a low-density surface) and that carbon removal continues for a prolonged period after the oxygen supply in the gas phase has been shut off. The edge carbons are removed by both oxygen from the gas phase and oxygen in the adsorbed oxides which migrate from the neighboring basal carbon atoms.
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