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).

(a)

(b)

(c)

(d)