Fig. 2

Characterization of OPuC (a) Zeta potential of pullulan and OPuC at 1 mg mL^− 1 (b) Singlet oxygen generation (¹O₂) measurement of free Ce6, and OPuC at 10 μ mL^− 1 of Ce6 by mixing with singlet oxygen sensor green (SOSG, conc; 10 μM) in deionized water (DI water). All light irradiations were performed at 670 nm. (4 J cm^− 2, 20 mW cm^− 2, 200 s)