Spectroelectrochemical study of poly-3,4-ethylenedioxythiophene films in the presence of different supporting electrolytes

Tolstopyatova, E. G.; Pogulaichenko, Nadezhda A.; Eliseeva, Svetlana N.; Kondratiev, V. V.

doi:10.1134/s1023193509030033

Cited by 27 publications

(20 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1, curve 1). Moreover, the charging/ discharge processes of these films are reversible and not accompanied with any additional processes; both the cathodic and anodic currents increase in proportion to the potential scan rates, which is the direct evidence of reversible film charging/ discharge processes [25][26][27][28][29]. Besides, PEDOT films show a stable electrochemical response in aqueous solutions of 0.1 M sulfuric acid.…”

Section: Resultsmentioning

confidence: 91%

Electroless deposition of gold into poly-3,4-ethylenedioxythiophene films and their characterization performed in chloride-containing solutions

Kondratiev

Pogulaichenko

Suo

et al. 2011

J Solid State Electrochem

View full text Add to dashboard Cite

Au-containing polymer films were obtained by electroless deposition of gold from diluted solutions of HAuCl 4 into preliminarily reduced poly-3,4-ethylenedioxythiophene (PEDOT) films. Structural peculiarities of such pristine and composite films were characterized by scanning and transmission electron microscopy methods. It was established that the gold clusters forming under such deposition appear on the outer surface of polymer films and their pores. The clusters' sizes ranged between 30 and 100 nm depending on the time of exposition of a PEDOT film in solutions of Au(III) ions and the concentration of these ions. It was also observed that in contrast to pristine PEDOT films, cyclic voltammograms (CVs) of composite films in the presence of chloride ions show additional redox peaks resulting from oxidation of gold with formation of an insoluble product and followed by the product reduction under reversal of the potential scan direction. As a result of parallel electrochemical quartz crystal microbalance (EQCM) and CV measurements, it was also established that the number of chloride ions per one transferring electron in the gold oxidation process is near to unity. To elucidate the oxidation degree of gold in the presence of chloride ions, a special procedure of changing the electrode potential was used. It consisted of clamping the high anodic potential in the region of gold oxidation (0.97 V, Ag/AgCl) and subsequent gradual decrease of the electrode potential with a constant scan rate. Under these conditions, it was possible to completely oxidize all the gold particles containing in a composite film and find out the maximum amount of electricity consumed for the product particles' reduction. A comparison between such data and the results obtained in EQCM determinations of the gold content in the same film led to the conclusion that the oxidation state of gold in the complexes formed is Au(III). The effects of chloride ion concentration and scan rate of the electrode potential on current responses of PEDOT-Au films were investigated. Some primary conclusions on the kinetics of the studied processes are made.

show abstract

Section: Resultsmentioning

confidence: 91%

Electroless deposition of gold into poly-3,4-ethylenedioxythiophene films and their characterization performed in chloride-containing solutions

Kondratiev

Pogulaichenko

Suo

et al. 2011

J Solid State Electrochem

View full text Add to dashboard Cite

show abstract

“…As illustrated in Figure 9c for the PEDOT–Au sample, an extra pattern is also observed during the measurement of dA/d t in the near infrared (NIR) region (900 nm) 92. This observation is correlated to the concentration of the p ‐type polaronic carriers during the oxidation of PEDOT, these species being more or less delocalized over the polymer backbone.…”

Section: Introductionmentioning

confidence: 75%

Hybrid PEDOT–Metal Nanoparticles – New Substitutes for PEDOT:PSS in Electrochromic Layers – Towards Improved Performance

et al. 2012

View full text Add to dashboard Cite

International audienceHybrid organicinorganic nanocomposites of poly(3,4-ethylenedioxythiophene) (PEDOT) and silver or gold {PEDOTmetal (PEDOTM) nano-objects (M = Ag, Au) (particle diameter down to 60 nm)} were prepared by a one-pot oxidative aqueous dispersion polymerization using ammonium persulfate as an oxidant and the corresponding metal salts as co-oxidant (HAuCl4 and AgNO3) in the presence of pyrrole-modified-poly(N-vinylpyrrolidone-co-vinyl alcohol) (PVP-co-PVAL-mod-Py) stabilizer. The hydrophilic character of such a stabilizer enhances the polymer layer through hydrophilic interactions, which leads to a smooth surface with high wetting properties for subsequent electropolymerizations. PEDOTM is more conducting than the commercially available PEDOT:PSS, in which the PSS acts as an insulating agent (electrical conductivities up to 1.25 Scm(-1)). These nanocomposites were used to replace PEDOT:PSS as anchoring layer for further EDOT monomer polymerization, providing an improvement of the electrochromic properties of PEDOT in terms of not only contrast ratio and coloration efficiency but also switching time respons

show abstract

“…By increasing the potential, the intensity of the 610‐nm band decreases, and a new broad band appears at 900 nm and gains its intensity, suggesting the increased fraction of polarons and/or π‐dimers in the PEDOT:S‐PHE film. When the applied potential was increased further, both the 610‐ and 900‐nm bands disappeared and only absorption band in the NIR due to bipolarons was observed …”

Section: Resultsmentioning

confidence: 99%

Thermoelectric properties of PEDOT films prepared by electrochemical polymerization

Zhang

Goto

Imae

et al. 2017

J Polym Sci B Polym Phys

View full text Add to dashboard Cite

Thermoelectric (TE) properties of flexible and freestanding poly(3,4-ethylenedioxythiophene) (PEDOT) films synthesized via galvanostatic polymerization of 3,4-ethylenedioxythiophene in propylene carbonate containing sulfated poly(bhydroxyethers) (S-PHE) as polymer electrolyte were elaborately studied. Both electrical conductivities (r) and Seebeck coefficients (S) of the PEDOT:S-PHE films were increased by decreasing the temperature (T) or by increasing the current density (J) during electrosynthesis. Possible reasons for the lack of a trade-off relation commonly observed between r and S are discussed on the basis of SEM and oxidation-level measurements. Preparation of the PEDOT:S-PHE films was optimized with respect to T and J. In addition, the oxidation level of the PEDOT:S-PHE films was controlled by potential and the change of their TE performances was discussed in conjunction with the change of chemical species involved. The power factor (PF 5 rS 2 ) of the PEDOT:S-PHE films reached 7.9 lW m 21 K 22 , leading to a dimensionless TE figure-ofmerit (ZT) of 0.013.

show abstract

Spectroelectrochemical study of poly-3,4-ethylenedioxythiophene films in the presence of different supporting electrolytes

Cited by 27 publications

References 13 publications

Electroless deposition of gold into poly-3,4-ethylenedioxythiophene films and their characterization performed in chloride-containing solutions

Electroless deposition of gold into poly-3,4-ethylenedioxythiophene films and their characterization performed in chloride-containing solutions

Hybrid PEDOT–Metal Nanoparticles – New Substitutes for PEDOT:PSS in Electrochromic Layers – Towards Improved Performance

Thermoelectric properties of PEDOT films prepared by electrochemical polymerization

Contact Info

Product

Resources

About