Table 1. Properties of SPIONs at t = 0 hours and t = 5 hours post-exposure to air.

Sample	Core size pXRD (nm)	Hydrodynamic Z-avg in 0.01 M NaCl (nm)	Zeta potential in 0.01 M NaCl (mV)	Polymer content by TGA (%)
t = 0 hours	8.8	86.7	19.9	82.1
t = 5 hours	9.1	64.4	19.0	80.2