The open archive for STFC research publications

Full Record Details

Persistent URL http://purl.org/net/epubs/work/47571990
Record Status Checked
Record Id 47571990
Title Interchain Spacing and Screening Length Modification of PSS Backbone Chains in Zwitterion-Doped Poly(3,4- Ethylenedioxythiophene):Polystyrene Sulfonate
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.
Organisation ISIS , ISIS-LOQ , STFC
Funding Information Mexico Secretary of Energy (SENER) (CVU 693809); Consejo Nacional de Ciencia y TecnologĂ­a (580 474/411378); EPSRC, Supergen Solar Challenge Grant (EP/M025020/1)
Related Research Object(s):
Licence Information:
Language English (EN)
Type Details URI(s) Local file(s) Year
Journal Article J Surf Invest-X-ray+ 14, no. 1 (2020): S60-S68. Is in proceedings of: European Conference on Neutron Scattering 2019 (ECNS 2019), St Petersburg, Russia, 30 Jun 2019 - 5 Jul 2019. doi:10.1134/S102745102007037X 2020