AFM images of (a) as-cleaned ITO surface and (b) 25-min-irradiated ITO surface.
(Color online). Observed SWF image of ITO films by KP. [(a) as-cleaned ITO; (b) 25-min-irradiated ITO; : the difference in work function between the tip and the observed object].
XPS spectra of O 1 core level for (a) as-cleaned and (b) 25-min-irradiated ITO samples. (c) The difference energy spectrum (25-min-irradiated minus as cleaned).
Change of relative atomic ratio on the ITO surfaces as a function of detection angle.
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