Figure 2.
Characterization of the “gates” engineered substrates and the pH-switchable ability of Ti-NTs-P. (A-B) High-resolution XPS N 1s (A) and Ti 2p (B) spectra of the indicated surfaces. (C) Schematic diagram of the integration of AIEgens (TPE-NH2) on Ti-NTs-P. (D) Mean fluorescent intensity (MFI) of the surface with AIEgens at different pH values (5.0 ~ 7.4). Scale bar, 50 μm. (E) Water contact angles of the indicated surfaces at different pH values between 7.4 and 5.0. * denotes p < 0.01. (F) The contact angle variation of Ti-NTs-P with the changes in pH between 7.4 and 6.0. All error bars denote the standard deviations over triplicate measurements with separately implants.