Figure 2

Time sequence of the snapshots of interactions between the nanoparticle and membranes in the presence of pH-sensitive polymers under different ionized degrees.

(a) N = 1 (i.e., pH = pK_a − 1.04); (b) N = 6 (i.e., pH = pK_a); (c) N = 11 (i.e., pH = pK_a + 1.04).