Table 1 Physical parameters of the nC₆₀

Feasible concentration^a

~1 mg/ml

Average size (nm)

80–100 nm

PDI (polydispersity index)

0.175 ± 5

Zeta potential (mV)

–27/30

UV–Vis major absorption peaks (nm)

219 (s), 265 (s), 344 (s), 450 (bw)

FTIR spectra (cm⁻¹)

525, 1000–1100, 1182, 1428, 1650–1660, 3200–3500

Mol. ratio C₆₀:NMP

~1

Mol. ratio C₆₀:H₂O

5–10