Table 1.

Different type of SWCNT and their iron content.

Type SWCNT	Diameter	Length	Residual Fe Catalyst
R-SWCNT	~0.8–1.2 nm	~1000 nm	<30 wt%
P-SWCNT	~0.8–1.2 nm	~600 nm	<15 wt%
HP-SWCNT	~0.8–1.2 nm	~200–500 nm	<2 wt%