Table 1.

Technical characteristics of carbon nanotubes

Carbon nanotubes	Length	Diameter	Purity	Chemical functionalization	Fabrication method
COOH–SWCNTs	1–5 μm	1.5 nm	95%	COOH–	CVD
COOH–MWCNTs	5–20 μm	25 nm	95%	COOH–	CVD

Abbreviations: CNTs, carbon nanotubes; COOH–SWCNTS, carboxyl-modified single-walled nanotubes; COOH–MWCNTs, carboxyl-modified multi-walled nanotubes, CVD, chemical vapor deposition.