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Title of Journal: J Solid State Electrochem

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Abbravation: Journal of Solid State Electrochemistry

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Springer-Verlag

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DOI

10.1016/0169-4332(86)90123-6

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1433-0768

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Characterisation of poly(neutral red) modified carbon film electrodes; application as a redox mediator for biosensors

Authors: Rasa Pauliukaite, Mariana Emilia Ghica, Madalina Barsan, Christopher M. A. Brett,

Publish Date: 2007/03/16
Volume: 11, Issue:7, Pages: 899-908
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Abstract

The polymer redox mediator, poly(neutral red) (PNR), has been synthesised and characterised electrochemically to investigate the best electropolymerisation and mediation conditions for application in enzyme biosensors and to clarify the mechanism of action. Neutral red was electropolymerised by potential cycling on carbon film electrode substrates by allowing the monomer to be oxidised during the full 20 cycles of polymerisation or reducing the positive limit of the potential window after the first 2 cycles to impede monomer oxidation with a view to obtaining longer polymer chains and a lesser degree of branching. Comparison was made with glassy carbon substrates. The PNR films on carbon film electrodes were characterised using cyclic voltammetry and electrochemical impedance spectroscopy, as well as in glucose biosensors prepared with PNR. Glucose oxidase enzyme was immobilised by encapsulation in silica sol-gel and compared with that obtained by cross-linking with glutaraldehyde. The biosensors were evaluated by chronoamperometry in 0.1 M phosphate buffer saline solution, pH 7.0, and showed evidence of electron transfer between the enzyme cofactor flavin adenine dinucleotide and PNR dissolved in the enzyme layer competing with PNR-mediated electrochemical degradation of H2O2 formed during the enzymatic process.Financial support from Fundação para Ciência e Tecnologia (FCT) Portugal. R.P. thanks FCT for a Postdoctoral fellowship (SFRH/BPD/14518/2003) and M.E.G. for a Ph.D. grant (SFRH/BD/14014/2003). Prof. H.-D. Liess is thanked for the gift of the electrical resistors.


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Other Papers In This Journal:

  1. Characterisation of poly(neutral red) modified carbon film electrodes; application as a redox mediator for biosensors
  2. A modified hierarchical porous carbon for lithium/sulfur batteries with improved capacity and cycling stability
  3. Electrocatalytic properties of platinum nanocenters electrogenerated at ultra-trace levels within zeolitic phosphododecatungstate cesium salt matrices
  4. Effect of oxidative stabilization on the electrochemical performance of carbon mesophases as electrode materials for lithium batteries
  5. In situ optical spectroelectrochemistry of single-walled carbon nanotube thin films
  6. Sulfonated poly(ether ether ketone)/poly(vinylidene fluoride)/graphene composite membrane for a vanadium redox flow battery
  7. Electrophoretic deposition of nickel
  8. Overlap of the oxide and hydrogen regions of platinum electrodes in aqueous acid solution
  9. Dealloying technique in the synthesis of lithium-ion battery anode materials
  10. Influence of cationic gemini surfactants on the electrochemical behavior of 2-thiouracil at silver electrodes
  11. Simultaneous voltammetric detection of dopamine and uric acid in the presence of high concentration of ascorbic acid using multi-walled carbon nanotubes with methylene blue composite film-modified electrode
  12. Indicator-free impedimetric detection of BCR/ABL fusion gene based on ordered FePt nanoparticle-decorated electrochemically reduced graphene oxide
  13. Thermal expansion
  14. Electrodeposition of nanocrystalline zinc from acidic sulfate solutions containing thiourea and benzalacetone as additives
  15. Modeling of surface exchange reactions and diffusion in composites including transport processes at grain and interphase boundaries
  16. The electrooxidation of small organic molecules on platinum nanoparticles supported on gold: influence of platinum deposition procedure
  17. Lignite-derived mesoporous N- and O-enriched carbon sheet: a low-cost promising electrode for high-performance electrochemical capacitors
  18. Phase composition of electrodeposited silver-indium alloys
  19. Structural and optical properties of tripod-like ZnO thin film and its application in dye-sensitized solar cell
  20. Electrochemical characterization of carbon paste electrodes modified with MgZnGa and ZnGaAl hydrotalcite-like compounds
  21. On the open-circuit interaction between methanol and oxidized platinum electrodes
  22. Experimental and theoretical studies on the corrosion properties of some conducting polymer coatings
  23. Changing face of electrochemistry
  24. Effect of sonochemistry: Li- and Mn-rich layered high specific capacity cathode materials for Li-ion batteries

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