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O 1s X-ray photoelectron spectroscopy (XPS) spectra of the untreated grade IV (a) and the treated grade IV surfaces (b). C1s spectra of the untreated grade IV (c), and the treated grade IV (d) surfaces. (GR IV: Titanium grade IV; GR V: Titanium grade V; T: SLA treated; NT: SLA non-treated).
