Fig. 2From: Programmed ROS/CO-releasing nanomedicine for synergetic chemodynamic-gas therapy of cancerThe sequential release behaviors: (i) acid-triggered release of ROS/·OH from MnO2@MSN (a, b), (ii) ·OH-triggered release of CO from FeCO@MSN (c), (iii) acid-triggered release of CO from FeCO-MnO2@MSN (d)Back to article page