Table 2. Physiochemical properties of non-adhesive polystyrene nanoparticles.

Estimated particle diameter (nm)	Measured particle diameter (nm)a	ζ-potential (mV)b	Polydispersity index
70	71.5 ± 0.2	-6.7 ± 0.4	0.18
200	224.0 ± 1.7	-3.4 ± 0.2	0.03
700	682.4 ± 4.2	-3.2 ± 0.3	0.04

^a Diameter (number mean) measured via dynamic light scattering. Data represents the average of 3 independent measurements ± SEM, with n ≥ 100 particles per measurement.

^b Measured at 25°C in 15× diluted PBS (10mM NaCl; pH 7.4). Data represents the average of 3 independent measurements ± SEM, with n ≥ 100 particles per measurement.