Biomedical Engineering Reference
In-Depth Information
sensors. Nanostructuring electrodes with carbon nanotubes for its
sensing applications have been reviewed [195]. Glucose oxidase,
the most popular oxidase enzyme, can be immobilized onto CNTs by
electrodeposition within conducting polymers [196].
Electrochemical functionalization of single-walled carbon
nanotubes (SWNTs) with PANI has also been done in ionic
liquids [197]. SWNTs are covalently functionalized during the
electropolymerization of aniline in ionic liquids. This methodology
provides a novel way by which large amount of SWNTs (15 mg/ml)
can be modified by aniline electrochemically.
Figure 1. 17
SEM images of (a) aligned nanotubes after transfer onto a gold
foil (a small piece of the as-synthesized aligned nanotube film is included
at the bottom-left corner to show the amorphous carbon layer as well)
and (b) the conducting polymer-CNT coaxial nanowires produced by cyclic
voltammetry (25 mV/s) on the aligned carbon nanotube electrode in an
aqueous solution of 0.1 M NaClO
containing 0.1 M pyrrole. TEM images of
the CP-CNT coaxal nanowire formed from the cyclic voltammetry method.
The images ( c ) are in the tip region and (d) on the wall [194]. Reproduced
by kind permission from the publisher.
4
 
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