A–C. Loading of NP (liposomes, quantum dots) into MSN. A,B. Flow cytometry of loading comparing the fluorescence of MSN, either unloaded (black) or with NP-loaded (A, green, liposomes; C, red, quantum dots). C. Fluorescent image of MSN containing FITC labeled nanoliposomes. D. Release profiles of quantum dots from oxidized (blue) and APTES modified (red) MSN.