X-ray photoelectron spectroscopy was used to characterize a highly oriented pyrolytic graphite (HOPG) sample. The HOPG was freshly cleaved using Scotch tape prior in the entry lock of the spectrometer and subsequently cleaned using an argon cluster source. This method of cleaning has led to an improved definition of the C KLL Auger signal used for differentiation in the determination of sp2/sp3 ratios according to the method of Lascovich et al. [Appl. Surf. Sci. 78, 17 (1994)].
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2017
American Vacuum Society
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