Figure 3

(a) FTIR spectra with some detailed bond peaks for bare IONPs, Arg@IONPs, PEG-Arg@IONPs, and mPEG. (b) UV-visible absorbance at 450 nm to screen dispersion stability of solutions containing PEG-Arg@IONPs in water, DMEM, and saline (c) Hydrodynamic size of PEG-Arg@IONPs.