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Conducting PEDOT nanoparticles: controlling colloidal stability and electrical properties
Date
2018
Abstract
The synthesis of conducting polymer nanoparticles by oxidative polymerization can be a challenge, because the addition of oxidizers may compromise the colloidal stability of the system. In this work, we report the successful synthesis poly(3,4-ethylenedioxythiophene) (PEDOT) nanoparticles by means of miniemulsion polymerization. We study the role of oxidizing agents (iron(iii) p-toluenesulfonate and hydrogen peroxide) during the parti- cle formation particles and in the electric properties. The presence hydrogen peroxide is demonstrated to be crucial in the macroscopic stability of the suspensions and the mor- phology of the resulting nanoparticles. The obtained suspensions, containing particles of diameters of around 30 nm, are stable for several months. The electrical conductiv- ity increases with increasing the content of iron(iii) p-toluenesulfonate, but it decreases with addition of hydrogen peroxide, which can be explained by secondary reactions in the polymerization process.
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Description
peer-reviewed
Publisher
American Chemical Society
Citation
Journal of Physical Chemistry C;122 (33), pp. 19197-19203
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Funding Information
Dirección General de Investigación Cientà ca y Técnica, Max Planck Society, Spanish Ministry of Education, Culture and Sport, Spanish Ministry of Economy and Competitiveness