Fig. 1From: Fabrication of methylene blue-loaded ovalbumin/polypyrrole nanoparticles for enhanced phototherapy-triggered antitumour immune activationCharacterization of the MB@OVA/PPY NPs. A, B TEM image. C Particle size distribution. D UV–Vis absorbance spectra. E FTIR spectra. F EDX spectrum. G XRD spectrum. H Content of OVA. I Release of OVA at different pH valuesBack to article page