[PtxMA]:[LMA]:[BMDO] = 0:1:2 (C0), was performed by reversible addition-fragmentation chain-transfer (RAFT) dispersion copolymerization at 20 wt % solids, as follows. In a 7-mL vial fitted with a rubber septum and a magnetic stirring bar, a mixture of LMA (0.203 g, 8.00 × 10 -4 mol, DP n,th = 150), BMDO (0.256 g, 1.58 × 10 -3 mol), T21s initiator (0.2 mg, 9.26 × 10 -4 mmol, dissolved at 0.1% w/v in DMF) and POEGMA 28 macro-CTA (0.048 g, 5.33 × 10 -3 mmol; macro-CTA/initiator molar ratio = 5.0) in anhydrous DMF (2 g, 2.1 mL) was degassed by argon bubbling for at least 15 min and then immersed in a preheated oil bath at 90 °C for 24 h. The reaction was stopped by immersing the reaction vessel in ice. LMA conversion was determined by 1 H-NMR spectroscopy by integrating the two oxymethylene protons of LMA at 5.5 and 6.0 ppm with PLMA protons at 3.8 ppm. M n and Ð were determined by SEC. The nanoparticles were poured into a pre-wetted dialysis bag (MWCO 3500, RC membrane) and dialyzed against acetone or DMF (for the fluorescent nanoparticles). The dialysate was changed twice a day for three days. After dialysis, the suspension of nanoparticles was transferred to another