Diseases therapy performance of PEN-derivate particle systems. (a) Schematic illustration of DC binding, phagocytosis, and digestion of tumor cells treated with PDL1-loaded PDA nanoparticles (PDL1Ab-IQ/PN) under NIR irradiation. (b) TEM images of the phagocytosis of tumor cells upon coculture with DCs. Scale bar: 2 μm. (c) Enlarged images of corresponding blue-lined box areas in (b). Scale bar: 200 nm. Reproduced with permission. Copyright 2019, American Chemical Society. (d) Schematic illustration of lipopolysaccharide (LPS)-induced periodontal disease and design of ROS scavenging. (e) Photographic images of Kunming mice 3 days after various treatments. (d and e) Reproduced with permission. Copyright 2018, American Chemical Society. (f) Schematic illustration of the protocol for a test including the grafting coumarin probe, bacterium (MDR KP) fluorescence detection, and photothermal treatment. (g) Time-lapse PA images captured at an interval of 10 min with an 808 nm NIR light. Scale bar: 2 mm. (h) Thermal images of the infection regions irradiated with 808 nm NIR irradiation. (i) Photographs of the MDR KP colonies on the plate count agar plates. (f–i) Reproduced with permission. Copyright 2020, American Chemical Society.