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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

Figure 1.

Figure 1

Characterization of fibrous nanomaterials. Raman spectra from CNF (A), SWCNT (B), and crocidolite asbestos (C). For the graphite-based materials CNF and SWCNT there are two common features: D band at 1350 cm−1 due to amorphous carbon, impurities, and structural defects and G band at 1590 cm−1 due to high-ordered graphite structure. Low-frequency bands called radial breathing mode (RBM) are seen only in the SWCNT spectrum. The crocidolite spectrum shows specific bands due to metal – oxygen vibrations, below 500 cm−1 and to silicon – oxygen vibrations in the rest of the spectrum.