Figure 4
From: Controlling Cellular Uptake of Nanoparticles with pH-Sensitive Polymers
Phase diagrams describing the equilibrium state of the particle-membrane systems.
(a) the receptor-ligand interaction strength verse the ionized degree N, where rcut = 1.0 nm and σP = 2.5 e/nm2; (b) the receptor-ligand interaction range verse the ionized degree N, where 
and σP = 2.5 e/nm2; (c) the surface charge density verse the ionized degree N, where rcut = 1.0 nm and 
. In (a)–(c), the membrane is neutrally charged. (d) Negative lipid fraction (i.e., the number of negative lipids/the total number of lipids and receptors) verse the ionized degree N, where 
, σP = 2.5 e/nm2 and rcut = 1.0 nm.
