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. Author manuscript; available in PMC: 2009 Sep 16.
Published in final edited form as: J Biomed Nanotechnol. 2005 Mar 1;1(1):3–17. doi: 10.1166/jbn.2005.004

Fig. 8.

Fig. 8

(a) Schematic of a carbon nanotube wrapped with single stranded DNA.76 (b) Absorption spectra of two different fractions (f47 and f49) of SWNTs wrapped with DNA after chromatographic ion exchange separation. Fraction 47 has a more pronounced absorption in the metallic interband transition, M11 (400 to 600 nm), with weaker absorption in the semiconducting interband transition, S11 (900 to 1600 nm) indicating that f47 is enriched in metallic nanotubes.76 Data courtesy of Ming Zheng, DuPont. Reproduced with permission of Nature Publishing Group.