Fig. 3

In vitro release profile and stability of UiO-66–VIN–PEG. A, B Cumulative release of VIN from UiO-66–VIN and UiO-66–VIN–PEG at pH 5.4 and 7.4. C–E Physical stability evaluation based on (C) particle size, D PDI, and E EE% at 4 °C and 25 °C over 30 days. Data are presented as means ± standard deviations (n = 3). Statistical significance: *P < 0.05,**P < 0.01