Figure 3
Rayleigh ratios R ( q , c ) and hydrodynamic diameters ( D H ) obtained for PAA 2K - γ -Fe 2 O 3 complexed with PTEA 11K - b -PAM 30K copolymers. (a) Normalized Rayleigh ratios R(X)/R∞ obtained at q = 1.87 × 10−3Å−1for γ-Fe2O3-PAA2K complexed directly with copolymers and homoPEs: PTEA11K-b-PAM30K (black closed symbols), PDADMAC (red closed symbols), PEI (blue closed symbols), and PAH (green closed symbols), for the NPs-PEs charges ratioZ ranging from 10−3to 100. The total concentration is c ~ 0.1 wt.% and temperature T ~ 25°C. (b) Hydrodynamic diameter D H as a function of Z for the same system.