Table 1.

Iron oxide nanoparticles (IONPs) and physical characteristics

Nanoparticle	Buffer	Size (nm)	Zeta Potential (mV)
NH2-IONPs	HEPES, 0.01 M, pH 8.5	39.64	-0.75
I-IONPs	HEPES, 0.01 M, pH 7.0	21.45	0.29
NalGYOrn(PEG4SH)R-IONPs	HEPES, 0.01 M, pH 7.0	55.49	8.06