TABLE 1.

Physical Characterization of C₆₀ and Vehicle Samples

	Hydrodynamic diameter (Z-average, nm) PDI and zeta values, mean ± SD
	As-prepared sample (sample 1)			Sample 1 after 8 min			Sample 1 after 38 min
	Z-average, nm	PDI	Zeta, mV	Z-average, nm	PDI	Zeta, mV	Z-average, nm	PDI	Zeta, mV
PVP	34.95 ± 1.91	1.0	−1.7	34.94 ± 1.97	ND	3.11	ND	ND	ND
PVP/C60	371.3 ± 1.20	0.34 ± 0.02	1.78	371.3 ± 1.2	ND	1.78	369.6 ± 3.3	0.33 ± 0.01	1.5

ND, Not determined