Figure 3.

DLS results showing the effect of block copolymer:core (by mass) on tannic acid (TA)-chitosan nanoparticle size at a 1:1 ratio of TA:chitosan. Water was used as the solvent. Increasing the relative amount of block copolymer, i.e., changing the ratio from 1:2 (red) to 1:1 (blue) reduced particle size. Further increasing the relative amount of block copolymer ratio from 1:1 (blue) to 5:4 (green) resulted in the formation of TA-chitosan nanoparticles and empty micelles. The mass ratio of TA:chitosan was held constant at 1:1.