Filmforming electropolymerization of pyrrole on iron in aqueous oxalic acid

Beck, F.; Michaelis, R.; Schloten, F.; Zinger, Baruch

doi:10.1016/0013-4686(94)80058-8

Cited by 227 publications

(96 citation statements)

References 14 publications

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“…an average polymer density of 1.5 g/cm 3 and the involvement of 2 electrons in the polymerization reaction. 31 The calculated average thickness of the obtained PPy film in the presence of small counter-ions was 44 nm ± 1 nm (s.e.m. ; n=24), while in the case of large counter-ions the estimated thickness was 82 nm ± 5 nm 80 (s.e.m.…”

Section: -12mentioning

confidence: 97%

Doped overoxidized polypyrrole microelectrodes as sensors for the detection of dopamine released from cell populations

Sasso

Heiskanen

Diazzi

et al. 2013

Analyst

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A surface modification of interdigitated gold microelectrodes (IDEs) with a doped polypyrrole (PPy) film for detection of dopamine released from populations of differentiated PC12 cells is presented. A thin PPy layer was potentiostatically electropolymerized from an aqueous pyrrole solution onto electrode surfaces. The conducting polymer film was doped during electropolymerization by introducing counter-ions in the monomer solution. Several counter-ions were tested and the resulting electrode modifications were characterized electrochemically to find the optimal dopant that increases sensitivity in dopamine detection. Overoxidation of the PPy films was shown to contribute to a significant enhancement in sensitivity to dopamine. The changes caused by overoxidation in the electrochemical behavior and electrode morphology were investigated using cyclic voltammetry and SEM as well as AFM, respectively. The optimal dopant for dopamine detection was found to be polystyrene sulfonate anion (PSS-). Rat pheochromocytoma (PC12) cells, a suitable model to study exocytotic dopamine release, were differentiated on IDEs functionalized with an overoxidized PSS--doped PPy film. The modified electrodes were used to amperometrically detect dopamine released by populations of cells upon triggering cellular exocytosis with an elevated K+ concentration. A comparison between the generated current on bare gold electrodes and gold electrodes modified with overoxidized doped PPy illustrates the clear advantage of the modification, yielding 2.6-fold signal amplification. The results also illustrate how to use cell population based dopamine exocytosis measurements to obtain biologically significant information that can be relevant in, for instance, the study of neural stem cell differentiation into dopaminergic neurons

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Section: -12mentioning

confidence: 97%

Doped overoxidized polypyrrole microelectrodes as sensors for the detection of dopamine released from cell populations

Sasso

Heiskanen

Diazzi

et al. 2013

Analyst

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“…Classification of anions dopants according their size it is not done in accordance to the size of the solvated ions, but based on the similarity in in redox behavior of PPy films (shape of voltammograms, kinetics parameters, etc. [49,50]. The nature of a dopant also impacts mechanical properties of polymer films, thus, PPy films containing toluenesulfonate, perchlorate, and fluoroborate anions showed significant mechanical strength, but low elasticity [19].…”

Section: Scheme 1 -Electrochemical Polymerization Of Pyrrolementioning

confidence: 99%

Electroconducting materials based on polypyrrole

Porjazoska-Kujundziski¹,

Chamovska²,

Grchev³

2016

Zas Mat

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“…In recent times, conducting polymers have received considerable attention as corrosion protective coatings for oxidizable metals. It is now well-known that electrochemical polymerization is an effortless and most suitable method for corrosion protection [13][14][15][16] . The present work deals with the electro polymerization of PICA coating on LN SS in 0.5 M H 2 SO 4 medium.…”

Section: Introductionmentioning

confidence: 99%

Anti-Corrosion Application of Poly(indole-5-carboxylic Acid) Coating on Low Nickel Stainless Steel in Acidic Medium

2016

Chem Sci Trans

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Poly(indole-5-carboxylic acid) (PICA) has been synthesized by electrochemical polymerization technique from different concentration of poly(indole-5-carboxylic acid) using lithium per chloride as oxidation agent at different scan rate. The as-synthesized PICA was characterized using Fourier transform infrared spectroscopy (FT-IR) and Proton nuclear magnetic resonance spectroscopy ( 1 H-NMR). Thermal analysis of the PICA was performed by Thermo gravimetric analysis (TGA). The corrosion protection performance of low nickel stainless steel (LN SS) specimens coated with 0.1 M concentration of PICA was investigated in 0.5 M H 2 SO 4 medium using potentiodynamic polarization and electrochemical impedance spectroscopic (EIS) methods. The morphological properties of the polymer were characterized by scanning electron microscopy (SEM). The as-synthesized PICA has been used in order to achieve adherent, as well as environmentally preferential good anti-corrosive coating. Electrochemical corrosion tests and surface analysis results evidently showed that PICA coating served as a stable mass matrix on LN SS against corrosion. It was also revealed that the coating of PICA at 0.1V scan rate with 0.1M indole-5-carboxylic acid exhibited the best corrosion resistance among all concentrations.

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Filmforming electropolymerization of pyrrole on iron in aqueous oxalic acid

Cited by 227 publications

References 14 publications

Doped overoxidized polypyrrole microelectrodes as sensors for the detection of dopamine released from cell populations

Doped overoxidized polypyrrole microelectrodes as sensors for the detection of dopamine released from cell populations

Electroconducting materials based on polypyrrole

Anti-Corrosion Application of Poly(indole-5-carboxylic Acid) Coating on Low Nickel Stainless Steel in Acidic Medium

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