Table 1. Z-Average Size and Z-Potential of NC and Modified NC.

sample	Z-average (nm)	polydispersive index	Z-potential (mV)
NC	130 ± 2	0.189 ± 0.008	–54 ± 2
oxidized NC	121.0 ± 0.7	0.18 ± 0.01	–58 ± 1
NC–Jeffamine	190 ± 2	0.243 ± 0.05	–33 ± 1