Research Article

Biodegradable Polymer/TiO2 Nanotubes Loaded Roxithromycin as Nanoarray Capsules for Long-Lasting Antibacterial Properties of Titanium Implant

Figure 3

The XPS spectra of O 1s and C 1s of different samples: (a) O 1s spectrum; (b)–(d) C 1s spectrum of TNT samples (b), PEG layer coated on the TNT surface (c), and chitosan layer coated on the TNT surface (d).
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