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(a) Ppa release curves in buffer with NIR light irradiation at 24 h for the generation of 1O2. (b) 1O2 generation of nanoparticles determined by DPBF as a detector. (c) Confocal laser scanning microscopy images of cellular internalization of Ppa, VSP and OCP nanoparticles treated with or without 1 min light radiation.
