Fig. 5. (A) ZnPcS₄⁻ mediated dispersion photopolymerization of HPMA by varying target DPs from 100 to 450 at 20 wt% total solids content. Polymerizations were conducted under the irradiation of NIR light (λ_max = 730 nm; 60 mW cm⁻²) for 24 hours without prior deoxygenation in water at a fixed reaction stoichiometry of [PEG₁₁₃-CDTPA] : [TEOA] : [ZnPcS₄⁻] = 1 : 4 : 0.02. (B) Digital photos of photo-RAFT dispersion polymerization of HPMA with varying target DPs from the same reaction in (A). (C) Corresponding TEM images showing the major and minor morphologies of self-assembled polymeric nanoparticles (S: sphere, W: worms, and V: vesicles).