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Preparation and Charge-Transfer Study in a Single-Walled Carbon Nanotube Functionalized with Poly(3,4-ethylenedioxythiophene)
journal contribution
posted on 2015-09-17, 00:00 authored by Hana Hajova, Zuzana Kominkova, Ana Santidrian, Otakar Frank, Lubomir Kubac, Frantisek Josefik, Martin KalbacConductive and biocompatible coatings
are currently in great demand.
Poly(styrenesulfonic acid) (PSS)-stabilized poly(3,4-ethylenedioxythiophene)
(PEDOT) is probably the most successful representative of this class
of materials. For many of these applications, the PEDOT needs to be
stabilized in the charged state by PSS, which compromises the biocompatibility
of this polymer. Here, we propose an alternative stabilization of
PEDOT by functionalized single-wall carbon nanotubes (SWCNTs). We
functionalized SWCNTs using the 4-chlorobenzene-3-sulfonic acid group
and prepared the composite by directly performing the polymerization
of 3,4-ethylenedioxythiophene in the presence of functionalized SWCNTs.
A study of the electronic structure of the SWCNTs, functionalized
SWCNTs, and the composite by in situ Raman spectroelectrochemistry
showed that the electronic structure of the SWCNTs and the behavior
of SWCNTs are not significantly altered by functionalization or embedding
into the composite, and the charged state of the nanotubes can be
tuned efficiently by electrochemical doping. The films prepared from
the composite exhibit conductivity similar to that of the PEDOT stabilized
by PSS; hence, the proposed new composite can be suggested as a biocompatible
alternative to PEDOT/PSS, for example, in bioelectrodes or in biocompatible
sensors.