Synthesis and Layer-by-Layer Deposition of Spherical Poly(3,4-ethylenedioxythiophene) Nanoparticles - Toward Fast Switching Times between Reduced and Oxidized States
✍ Scribed by Kevin Müller; Mi-Kyoung Park; Markus Klapper; Wolfgang Knoll; Klaus Müllen
- Publisher
- John Wiley and Sons
- Year
- 2007
- Tongue
- English
- Weight
- 288 KB
- Volume
- 208
- Category
- Article
- ISSN
- 1022-1352
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✦ Synopsis
Abstract
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.
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