Table 1.

Characteristics of the six types of SWCNTs used in this study.

	S-L	S-L-COOH	S-L-OH	S-S	S-S-COOH	S-S-OH
Length (μm)	5–30	5–30	5–30	1–3	1–3	1–3
Outer diameter (nm)	1–2	1–2	1–2	1–2	1–2	1–2
Inner diameter (nm)	0.8–1.6	0.8–1.6	0.8–1.6	0.8–1.6	0.8–1.6	0.8–1.6
-COOH content (wt%)		2.73			2.73
-OH content (wt%)			3.96			3.96