Figure 1. (a) SEM image, (b) TEM image, and (c)
magnified TEM image of
MANP6:6. Magnified TEM images of (d) PNP, (e)
ANP6, and (f) MNP6. The insets show
structural illustrations of the nanoparticles. (g) UV–vis spectra of
PNP, ANP6, MNP6, and
MANP6:6. (h) EDX elemental mapping images of C, Fe, O,
and S on MANP6:6, along with the merge image. (i) EDX
line scan across the center of MANP6:6, showing the
atomic relative counts of C and Fe. (j) XPS spectrum of
MANP6:6 and (k) high-resolution XPS spectrum of Fe 2p.
(l) XRD pattern of MANP6:6. (m) Hydrodynamic size
distribution of MANP6:6. (n) Zeta potential evolution of
MANP6:6 before and after carboxylation.