Fig. 2
Characterization of nanoparticles: a UV–Vis absorption spectra of cRGD, PAA-cRGD and PAA in water, b N2 adsorption (hollow)–desorption (solid) isotherms (inset: pore size distribution from adsorption branch) of Fe3O4@SiO2@PAA-cRGD NPs, c FT-IR spectra of Fe3O4@SiO2 NPs, Fe3O4@SiO2@PAA-cRGD NPs and PAA, d Magnetization vs. applied magnetic field for Fe3O4, Fe3O4@SiO2, and Fe3O4@SiO2@PAA-cRGD NPs at 300 K