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. Author manuscript; available in PMC: 2016 Sep 7.
Published in final edited form as: Toxicol Appl Pharmacol. 2011 Feb 17;252(1):1–10. doi: 10.1016/j.taap.2011.02.001

Table 1.

Physico-chemical characteristics of the tested materials.

CNF (Pyrograf III) Crocidolite Asbestos SWCNT
Iron content, % 1.4 18 0.23
Surface area, m2/g 35 – 45 8.3 1040
Diameter, nm 60 – 150 210 1 – 4
Aspect ratio (median) 500 30 1000
Integral intensity ratio α R=ID/IG 0.95 N/A 0.05
Graphite mole fraction αχG = 1/(1+R) 0.51 N/A 0.95
α

Raman spectroscopy