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. Author manuscript; available in PMC: 2015 Nov 28.
Published in final edited form as: J Control Release. 2014 Aug 21;194:1–19. doi: 10.1016/j.jconrel.2014.08.015

Fig. 8.

Fig. 8

UV-responsive amphiphilic TiO2 nanotube arrays for controlled drug delivery: (A) Scheme of amphiphilic TiO2 nanotube layer fabrication. (B) Four methods for HRP loading. (C) Schematic illustration of HRP release under UV illumination. (D) Relative intensity of reflected light over time of HRP loaded TiO2 nanotubes after exposure to PBS without illumination (a), 50% UV illumination (b), and full UV illumination (c). Curve d shows the release of HRP from TiO2 nanotubes without surface modification. Adapted with permission from Ref. [98].