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. Author manuscript; available in PMC: 2009 May 11.
Published in final edited form as: Nanotechnology. 2008 Jul 15;19(34):1–10. doi: 10.1088/0957-4484/19/34/345102

Figure 1.

Figure 1

(a) Carbon nanotube array grown by plasma enhanced chemical vapor deposition. The length of a nanotube marked by arrow is 1 μm. The white-lined square covers an area of 2 μm × 2 μm that contains 126 nanotubes. (b) Carbon nanotubes collected on the sidewall by a magnet. (c) UV–vis measurement of carbon nanotube suspensions in culture medium. The absorbance values at λ460 is correlated to the concentration of CNTs. The inset is a typical spectrum of CNT at 4 pM scanning from 190 to 800 nm.