Bulletin of the American Physical Society
APS March Meeting 2011
Volume 56, Number 1
Monday–Friday, March 21–25, 2011; Dallas, Texas
Abstract: C1.00046 : Exploiting redox chemistries to manipulate structure and electrical conductivity in polymer acid-doped polyaniline
Author:
Template synthesis of polyaniline on
poly(2-acrylamido-2-methyl-1-propanesulfonic acid) yields electrostatically
stabilized particles that can be aqueously dispersed and cast into thin
films; electrical conductivity in these films scales with inter-particle
connectivity. Previous research has shown that solvent annealing with
dichloroacetic acid (DCA) induces structural rearrangement of polymer chains
and consequently enhances the electrical conductivity by up to two orders of
magnitude (from 0.4 to 40 S/cm). Alternatively, the electrostatic
interactions between polyaniline and its template can be neutralized through
chemical reduction with hydrazine monohydrate, after which the polymer
undergoes extensive structural rearrangement; subsequent exposure to nitric
oxide leads to reassociation of polyaniline and its polymer acid dopant.
Enhanced conductivity is observed following this chemical redox process, and
is attributed to extensive polymer chain relaxation and concurrent
elimination of the particulate nature of template-synthesized polyaniline.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2011.MAR.C1.46
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