Fig. 3
A FTIR spectra of Fe3O4-NH2, Fe3O4-5FU, Fe3O4-CMSC, Fe3O4-CMSC-5FU, 5-FU, CMSC infrared spectra measured between 600 and 4000 cm−1. B Zeta potential of Fe3O4-NH2 and Fe3O4-CMSC-5FU particles dispersed in water with different pH. C Particle size distribution of various formulation (F1–F7) nanoparticles and Fe3O4-NH2. D In vitro percent cumulative release of promising 5-FU formulations (F1, F2 and F3) in pH 5.4 and 7.2 buffer (n = 6 ± s.d.)