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Synthesis and Layer‐by‐Layer Deposition of Spherical Poly(3,4‐ethylenedioxythiophene) Nanoparticles ‐ Toward Fast Switching Times between Reduced and Oxidized States
Author(s) -
Müller Kevin,
Park MiKyoung,
Klapper Markus,
Knoll Wolfgang,
Müllen Klaus
Publication year - 2007
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.200700142
Subject(s) - pedot:pss , nanoparticle , chemical engineering , materials science , counterion , styrene , layer by layer , polymerization , layer (electronics) , polymer chemistry , cationic polymerization , electrochromism , poly(3,4 ethylenedioxythiophene) , surface plasmon resonance , sulfonate , nanotechnology , chemistry , polymer , electrode , organic chemistry , copolymer , sodium , composite material , ion , engineering , metallurgy
A microemulsion polymerization for the synthesis of poly(3,4‐ethylenedioxythiophene) (PEDOT) nanoparticles is described. Spherical and electrically conducting PEDOT particles with diameters as small as 27 ± 8 nm were obtained by using decyltrimethylammonium bromide as a cationic surfactant. PEDOT nanoparticle multilayers, alternated with poly(styrene sulfonate), were prepared by the layer‐by‐layer deposition technique. Electrochemical surface plasmon resonance experiments revealed a ten‐fold increase in the switching time between redox states as compared with Baytron P/poly(ethyleneimine) multilayers. The enhanced charge transport can be attributed to an improved diffusion of the charge‐balancing counterions into the PEDOT nanoparticles.