Figure 4: Physicochemical characterization of fluorescent PLGA NPs. (A, C, E)size distribution, zeta potential, and morphology (TEM, original magnification 31.000x) of 6-coumarin loaded PLGA nanoparticles. B, D, F) size distribution, zeta potential, and TEM (original magnification 31.000x) of cetuximab conjugated 6-coumarin loaded PLGA nanoparticles.