Table 1.

Characterization of MWCNTs

	Pristine MWCNTs	MWCNTs-COOH	MWCNTs-PEG
Diameter (nm)	10–20	10–20	10–20
Length (µm)	5–15	0.3–0.6	0.3–0.6
Zeta potential (mV)
In H2O	−14.97	−31.93	−15.60
In H2O (BSA-dispersed)	−15.83	−13.90	−19.03
In H2O (IgG-dispersed)	−13.83	−11.72	−17.21
Hydrodynamic size by DLS (nm)
In H2O	523.7	116.50	87.13
In H2O (BSA-dispersed)	320.27	108.40	87.10
In H2O (IgG-dispersed)	287.32	102.59	86.91

Abbreviations: DLS, dynamic light scattering; IgG, immunoglobulin G; MWCNTs, multiwalled carbon nanotubes; MWCNTs-COOH, carboxylated MWCNTs; MWCNTs-PEG, polyethylene glycol MWCNTs.