Pérez, G.E., Alkorbi, A., Iraqi, A. orcid.org/0000-0003-3060-6663 et al. (4 more authors) (2020) Interchain spacing and screening length modification of PSS backbone chains in zwitterion-doped poly(3,4-ethylenedioxythiophene):polystyrene sulfonate. Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques, 14 (S1). S60-S68. ISSN 1027-4510
Abstract
The interchain spacing and screening length modification of deuterated PSS (d-PSS) backbone chains in zwitterion-doped PEDOT:d-PSS were studied as a function of the doping concentration using small angle neutron scattering. Results suggest that the dopant, 3-(N,N-Dimethylmyristylammonio)propanesulfonate (DYMAP), forms worm-like micelle structures in the PEDOT:d-PSS dispersion that grow in size as the doping concentration increases. The interchain spacing between negatively charged d-PSS remains unaffected by DYMAP up to 15 mM doping concentration. However, from 15 to 25 mM doping concentration, the interchain spacing increases due to steric interactions of grown DYMAP worm-like micelles with the d-PSS chains. At 30 mM doping concentration, the interchain distance between negatively charged d-PSS chains is reduced due to the gelation of the PEDOT:d-PSS dispersion caused by the crosslinking between long DYMAP worm-like micelles and d-PSS chains. Meanwhile, the screening length of the neutralized d-PSS segments attached to the PEDOT oligomers increases as the DYMAP concentration increases form 5 to 30 mM due to the neutralization of the negatively charged d-PSS segments by their Coulomb interaction with the cation in DYMAP.
Metadata
Item Type: | Article |
---|---|
Authors/Creators: |
|
Copyright, Publisher and Additional Information: | © Pleiades Publishing, Ltd., 2020. This is an author-produced version of a paper subsequently published in Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | PEDOT:PSS; small angle neutron scattering; zwitterion; deuteration; correlation length; charge screening; interchain spacing |
Dates: |
|
Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Chemical and Biological Engineering (Sheffield) The University of Sheffield > Faculty of Science (Sheffield) > Department of Chemistry (Sheffield) |
Funding Information: | Funder Grant number ENGINEERING AND PHYSICAL SCIENCE RESEARCH COUNCIL EP/M025020/1 |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 21 Jan 2021 11:33 |
Last Modified: | 23 Jan 2021 11:54 |
Status: | Published |
Publisher: | Pleiades Publishing Ltd |
Refereed: | Yes |
Identification Number: | 10.1134/s102745102007037x |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:170237 |