Transport of alkali metal cations in poly(3,4-ethylenethiophene) films

Lisowska-Oleksiak, Anna; Kupniewska, A.

doi:10.1016/s0167-2738(02)00216-3

Cited by 24 publications

(13 citation statements)

References 11 publications

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“…31 It has been reported that degradation processes are neither enhanced nor accelerated by interaction with aqueous saline solutions, as compared to contact with ambient oxygen. [35][36][37] For biological applications, specific adhesion proteins are often employed, which create charged nm-sized regions and may possibly change the overall interfacial behavior. 33 In general, however, while it has been well established that the bulk optoelectronic properties of organic semiconductors are not seriously affected by contact with water, the specific properties of the conjugated polymer/electrolyte interface are by far much less characterized.…”

Section: Introductionmentioning

confidence: 99%

The study of polythiophene/water interfaces by sum-frequency generation spectroscopy and molecular dynamics simulations

et al. 2015

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Semiconducting polymer/water interfaces are gaining increasing attention due to a variety of promising applications in the fields of biology and electrochemistry, such as electrochemically-gated transistors and photodetectors, which have been used for biosensing and neuroscience applications. However, a detailed characterization of the polymer surface in the presence of an aqueous environment is still lacking. In this work, we employed sum-frequency generation vibrational spectroscopy, a surface-specific technique compatible with electrochemical/biological conditions, to demonstrate that the surface of thin films of regio-regular poly-3-hexylthiophene (rr-P3HT) undergoes a molecular reorientation when exposed to aqueous electrolytes, with respect to their surface structure in air. Experimental results are corroborated by molecular dynamics simulations. Since surface molecular orientation is believed to play a fundamental role in electrochemical and environmental stability of conjugated polymers, the reported findings not only contribute to the fundamental understanding of conjugated polymer/water interfaces, but they may also have implications in the design of conjugated polymers for enhancing their performance in electrolytic environments. † Electronic supplementary information (ESI) available: Sum-frequency generation theory and P3HT molecular modelling; analysis of thick samples; surface energy calculation from molecular dynamics simulations; Fig. S1-S7. See Fig. 7 (top panels) Averaged formation energy for the P3HT surface in vacuo (left) and in water (right). (bottom panels) Atomistic configurations corresponding to the minimum energy. Journal of Materials Chemistry B Paper

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Section: Introductionmentioning

confidence: 99%

The study of polythiophene/water interfaces by sum-frequency generation spectroscopy and molecular dynamics simulations

et al. 2015

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“…The selection of suitable water-soluble polyelectrolytes has recently allowed also studies in aqueous solutions, making the electropolymerisation reaction in such media easier, since suitable surfactant species lower the oxidation potential of EDOT [22,23]. The first and most used of all surfactants is poly(4-styrenesulfonate), which allows a highly conducting and stable polymer to be obtained [24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Electropolymerisation of 3,4-ethylenedioxythiophene in aqueous solutions

Pigani

Heras

Colina

et al. 2004

Electrochemistry Communications

101

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The potentiostatic electrosynthesis of poly(3,4-ethylenedioxythiophene) (PEDOT) in aqueous media without addition to the solution of any kind of surfactant has been studied by electrochemical quartz crystal microbalance (EQCM) and by spectroelectrochemistry. These tandem techniques have given valuable new information about the electropolymerisation process, allowing us to relate absorbance-charge and frequency-charge relationships to: (i) oligomers generation and chain propagation, as far as the length leading to precipitation is reached; (ii) growing of the polymer deposit and concomitant p-doping, and even (iii) overoxidation of the polymer film. An analysis of the whole of the data, in fact, shows that the charge spent is not necessarily totally involved in the polymer deposit formation, growth, and p-doping, so that it is necessary to be particularly careful in the fitting of the experimental data to linear models.

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“…The counter anion incorporated into the polymer to compensate the positively charged PEDOT plays a key role in defining PEDOT properties: when the polystyrene sulphonate (PSS) polyanion is used the PEDOT:PSS system has proven to produce films and micro-structured systems with facile electrochemistry, high-ionic conductivities, good electrochemical stability and a capacitance suitable for practical use in electrochemical supercapacitors 14 15 16 17 18 . Moreover, thanks to its favorable features, PEDOT:PSS has been recently employed for the fabrication of all-plastic OECT 19 20 21 .…”

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confidence: 99%

Selective detection of dopamine with an all PEDOT:PSS Organic Electrochemical Transistor

Gualandi

Tonelli

Mariani

et al. 2016

Sci Rep

145

110

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An all PEDOT:PSS Organic Electrochemical Transistor (OECT) has been developed and used for the selective detection of dopamine (DA) in the presence of interfering compounds (ascorbic acid, AA and uric acid, UA). The selective response has been implemented using a potentiodynamic approach, by varying the operating gate voltage and the scan rate. The trans-conductance curves allow to obtain a linear calibration plot for AA, UA and DA and to separate the redox waves associated to each compound; for this purpose, the scan rate is an important parameter to achieve a good resolution. The sensitivities and limits of detection obtained with the OECT have been compared with those obtained by potential step amperometric techniques (cyclic voltammetry and differential pulse voltammetry), employing a PEDOT:PSS working electrode: our results prove that the all-PEDOT:PSS OECT sensitivities and limits of detection are comparable or even better than those obtained by DPV, a technique that employs a sophisticate potential wave and read-out system in order to maximize the performance of electrochemical sensors and that can hardly be considered a viable readout method in practical applications.

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Transport of alkali metal cations in poly(3,4-ethylenethiophene) films

Cited by 24 publications

References 11 publications

The study of polythiophene/water interfaces by sum-frequency generation spectroscopy and molecular dynamics simulations

The study of polythiophene/water interfaces by sum-frequency generation spectroscopy and molecular dynamics simulations

Electropolymerisation of 3,4-ethylenedioxythiophene in aqueous solutions

Selective detection of dopamine with an all PEDOT:PSS Organic Electrochemical Transistor

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