. 2019 Feb 21;9(11):6363–6378. doi: 10.1039/c8ra08801b

XPS deconvoluted contribution of S (sulphur) 2p of PEDOT:PSS synthesized at various conditions.

Sample code	% PEDOT	% PSS⁻ and % SO₄²⁻	% PSSNa
Effect of PSS (no surfactant)
Pure PEDOT (without PSS)	85.41	14.59	—
EDOT : PSS weight ratio of 1 : 1 and EDOT : Na₂S₂O₈ mole ratio of 1 : 1	62.96	21.23	15.89
EDOT : PSS weight ratio of 1 : 11 and EDOT : Na₂S₂O₈ mole ratio of 1 : 1	31.47	45.57	22.96
EDOT : PSS weight ratio of 1 : 13 and EDOT : Na₂S₂O₈ mole ratio of 1 : 1	36.43	39.89	23.68

Effect of oxidant (no surfactant)
EDOT : PSS weight ratio of 1 : 11 and EDOT : Na₂S₂O₈ mole ratio of 1 : 1	31.47	45.57	22.96
EDOT : PSS weight ratio of 1 : 11 and EDOT : Na₂S₂O₈ mole ratio of 1 : 2	29.05	50.59	20.36
EDOT : PSS weight ratio of 1 : 11 and EDOT : Na₂S₂O₈ mole ratio of 1 : 4	19.56	35.27	45.13

Effect of surfactant
EDOT : PSS weight ratio of 1 : 11 and EDOT : Na₂S₂O₈ mole ratio of 1 : 2 with Triton X-100 (at CMC)	27.80	49.78	22.42
EDOT : PSS weight ratio of 1 : 11 and EDOT : Na₂S₂O₈ mole ratio of 1 : 2 with Triton X-100 (at 2.5CMC)	45.40	37.52	17.08
EDOT : PSS weight ratio of 1 : 11 and EDOT : Na₂S₂O₈ mole ratio of 1 : 2 with Triton X-100 (at 5CMC)	42.53	37.42	20.05
EDOT : PSS weight ratio of 1 : 11 and EDOT : Na₂S₂O₈ mole ratio of 1 : 2 with Triton X-100 (at 10CMC)	47.81	36.46	19.22
EDOT : PSS weight ratio of 1 : 11 and EDOT : Na₂S₂O₈ mole ratio of 1 : 2 with CTAB (at 2.5CMC)	15.34	30.57	54.09
EDOT : PSS weight ratio of 1 : 11 and EDOT : Na₂S₂O₈ mole ratio of 1 : 2 with SDS (at 2.5CMC)	45.82	34.32	19.87