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. Author manuscript; available in PMC: 2014 Sep 19.
Published in final edited form as: Analyst. 2011 Mar 4;136(17):3557–3565. doi: 10.1039/c0an00854k

Figure 3.

Figure 3

Representative cyclic voltammograms from electrodes before (dashed lines) and after modification with carbon nanotubes (solid line). Vertical columns compare types of functionalized nanotubes: amide-CNTs (panels A–C), carboxylic acid-CNTs (panels D–F) and octadecylamine-CNTs (panels G–I). Horizontal rows compare different compounds 10 μM serotonin (panels A, D, G), 10 μM dopamine (panels B, E, H), and 200 μM ascorbic acid (panels C, F, I). The insets for ascorbic acid show the reduction peaks.