Figure. 7. The concentration effect of nanoparticles: A. Cooperative nanoparticle internalization effect of nanoparticles with different surface properties, reproduced from Reference67 with permission from The Royal Society of Chemistry. B. The effect of properties of dual-polymer-tether linked nanoparticles on the degree of cell membrane encapsulation, reproduced from Reference77 with permission from Copyright © 2019, American Chemical Society.