Fig. 3.
Characterization of HP-MTi. (A) Representative TEM mapping images of AB@mPDA NPs. Scale bar, 100 nm. (B) Zeta potentials of mPDA NPs and AB@mPDA NPs. (C) Representative SEM images of HP-MTi. Scale bar, 5 μm. (D) High-resolution XPS spectrum of mPDA NPs and AB@mPDA NPs and the corresponding resolution spectrum for (E) N 1s. (F) Quantitative analysis of water contact-angle measurements and the representative images inserted on the top of each column. (G) Quantitative analysis of roughness, and (H) representative AFM images of HP-MTi. (I) Cumulative release curve of H2 from AB and HP-MTi in pH6.8, pH7.0, and pH7.4 for 72 h. (J) Quantitative analysis of the •OH scavenging ratio of MTi, P-MTi, and HP-MTi in pH6.8, pH7.0, and pH7.4. (∗P < 0.05, ∗∗P < 0.01, and ∗∗∗∗P < 0.0001.)