Abstract
A low pressure radio-frequency discharge in methane or a methane-oxygen mixture is used to deposit carbon species on the surface of compacted ZnO powder at 400° C. The carbon composition of the treated samples is examined in a separate Auger spectrometer system as the samples are heated in vacuum to 400° C, exposed at 400° C to oxygen, reannealed at the same temperature and subjected to argon ion bombardment. Evidence is presented that in the case of ZnO treated in methane-oxygen discharges, volume incorporation of carbon occurs and that this carbon moves to the surface of the sample in the course of subsequent vacuum heat treatment.
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Cope, J.O., Lynch, D.F. Plasma deposition and Auger studies of carbon impurities in zinc oxide. J Mater Sci 18, 3331–3336 (1983). https://doi.org/10.1007/BF00544158
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DOI: https://doi.org/10.1007/BF00544158