30 HIGH PERFORMANCE POLYMERS
rigidly with the surface due to the strong polarity of
the glass surface.
Only a few DNA molecules are fixed on a poly-
(vinyl butyral)-coated glasses. PVK and poly(phenaz-
asiline)-coated surfaces sufficiently fix and stretch
the DNA molecules. Such coated surfaces provide
an adequate AFM observation of the stretched DNA
molecules. A specific interaction is attributed to the π-
stacking between the aromatic amines in the polymers
and the base pairs in the DNA molecules [215].
1.4.9 Analytical Applications
In order to form dopamine sensing devices, N-
vinylcarbazole polymers were electrochemically
coated onto µm sized carbon fibers [216]. As
solutions, lithium perchlorate/acetonitrile, sodium
perchlorate/acetonitrile, and tetraethylammonium ...