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Morphology and ion diffusion in PEDOT:Tos. A coarse grained molecular dynamics simulation
Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska fakulteten. Ferdowsi Univ Mashhad, Iran.
Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska fakulteten.
Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska fakulteten.
2018 (engelsk)Inngår i: Physical Chemistry, Chemical Physics - PCCP, ISSN 1463-9076, E-ISSN 1463-9084, Vol. 20, nr 25, s. 17188-17198Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

A Martini coarse-grained Molecular Dynamics (MD) model for the doped conducting polymer poly(3,4-ethylenedioxythiophene) (PEDOT) is developed. The morphology of PEDOT:Tos (i.e. PEDOT doped with molecular tosylate) and its crystallization in aqueous solution for different oxidation levels were calculated using the developed method and compared with corresponding all atomistic MD simulations. The diffusion coefficients of Na+ and Cl- ions in PEDOT:Tos are studied using the developed coarse-grained MD approach. It is shown that the diffusion coefficients decrease exponentially as the hydration level is reduced. It is also predicted that the diffusion coefficients decrease when the doping level of PEDOT is increased. The observed behavior is related to the evolution of water clusters and trapping of ions around the polymer matrix as the hydration level changes. The predicted behavior of the ionic diffusion coefficients can be tested experimentally, and we believe that molecular picture of ionic diffusion in PEDOT unraveled in the present study is instrumental for the design of polymeric materials and devices for better and enhanced performance.

sted, utgiver, år, opplag, sider
Royal Society of Chemistry, 2018. Vol. 20, nr 25, s. 17188-17198
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URN: urn:nbn:se:liu:diva-149855DOI: 10.1039/c8cp02902dISI: 000436571800033PubMedID: 29900440OAI: oai:DiVA.org:liu-149855DiVA, id: diva2:1236443
Merknad

Funding Agencies|Troedssons foundation [896/16]; Knut and Alice Wallenberg Foundation through the project The Tail of the Sun; Swedish Research Council [201605990]; Advanced Functional Material center at Linkoping University

Tilgjengelig fra: 2018-08-02 Laget: 2018-08-02 Sist oppdatert: 2018-08-20

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