Fig. 7From: Regulated Surface Morphology of Polyaniline/Polylactic Acid Composite Nanofibers via Various Inorganic Acids Doping for Enhancing Biocompatibility in Tissue EngineeringXPS spectra (a) of prepared PANI/PLA composite nanofibrous scaffolds and the PANI/PLA-HA (b), PANI/PLA-SA (c), and PANI/PLA-PA (d) of the core level signal of N1sBack to article page