Fig. 1.
Characterization of PC/Fe@c(RGDfc). (a) The thickness of c(RGDfc) adsorbed on (PC/Fe)5-MPNs. (b) The total XPS spectra of the PC/Fe-MPNs and the PC/Fe@c(RGDfc) coatings, along with the elemental molar ratio obtained by XPS analysis in (c). (d) Zeta potential changes of coating surface resulting from c(RGDfc) adsorption at different concentrations on (PC/Fe)5-MPNs, while surface hydrophilicity changes of both types of composite coatings are shown in (e). (f) The variation of coating thickness with treatment time in PBS, 0.9%NaCl, DEME with or without 0.25% trypsin. (g) Optical photographs of PC/Fe-MPNs and PC/Fe@c(RGDfc) composite coatings on different substrates. (h) SEM photos and ImageJ roughness fitting of these coatings adhering to silicon substrate. N = 3, no significance noted as "ns," *p < 0.05, **p < 0.01, ***p < 0.001, using t-test. (For interpretation of the references to color in this figure legend, the reader is referred to the Web version of this article.)