Fig. 3From: A novel macrophage-mediated biomimetic delivery system with NIR-triggered release for prostate cancer therapya Drug release curves of DOX from DOX/PEG-BPEI-rGO with or without NIR irradiation. b The zeta potential of GO, BPEI-GO and PEG-BPEI-rGO. c Fluorescence spectra of DOX after adsorption on PEG-BPEI-rGO in water and ethanolBack to article page