Characterization of Carbon Film Electrodes for Electroanalysis by Electrochemical Impedance

Filipe, Olga M.S.; Brett, Christopher M.A.

doi:10.1002/elan.200402911

Cited by 62 publications

(73 citation statements)

References 17 publications

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“…Carbon film resistors were used to prepare carbon film electrodes with an exposed geometric area of 0.16 cm 2 using the procedure described in [23]. All bare electrodes were first pre- A c c e p t e d M a n u s c r i p t 6 NaPSS) at a scan rate of 100 mV s -1 ten times until a stable voltammogram was achieved.…”

Section: Carbon Film Electrode Pre-treatmentmentioning

confidence: 99%

“…Before using the carbon film electrodes, they were subjected to electrochemical pre-treatment by cycling the potential as described in the experimental section. The background current decreases with each cycle due to the decrease of the number of the functional groups on the surface of the carbon film electrode [23].…”

Section: Electrode Modification By Edot Polymerisationmentioning

confidence: 99%

“…This circuit consists of a cell resistance R Ω and a constant phase element CPE 1 in parallel with a charge transfer resistance R 1 ; CPE 1 is assumed to be a non-ideal capacitance with roughness factor , where is equal to 1 for a perfectly smooth surface and 0.5 for a porous electrode [23]. For the PEDOT-Pot modified electrode at +0.4 V a straight line was obtained ( Figure 3B), so the circuit was R Ω in series with a constant phase element, consistent with no electron Amperometric experiments at a constant potential of -0.50V and +0.55V were conducted with each type of coated electrode.…”

Section: Electrochemical Impedance Spectroscopymentioning

confidence: 99%

“…In the present work we describe, for the first time, the polymerisation of EDOT on carbon film electrodes (CFE) made from carbon film electrical resistors of 2 [23] that have been used successfully in various sensor and biosensor applications [17,24]. PEDOT modified electrodes were prepared in aqueous solution by potential cycling, potentiostatic and galvanostatic methods.…”

Section: Introductionmentioning

confidence: 99%

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Preparation and characterisation of poly(3,4-ethylenedioxythiophene) and poly(3,4-ethylenedioxythiophene)/poly(neutral red) modified carbon film electrodes, and application as sensors for hydrogen peroxide

Gonçalves

Ghica

Brett

2011

Electrochimica Acta

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Please cite this article as: A.R. Gonçalves, M.E. Ghica, C.M.A. Brett, Preparation and characterisation of poly (3,4-ethylenedioxythiophene) and poly(3,4-ethylenedioxythiophene)/poly(neutral red) modified carbon film electrodes; and application as sensors for hydrogen peroxide, Electrochimica Acta (2010Acta ( ), doi:10.1016Acta ( /j.electacta.2010 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. carbon-film electrodes (CFE) in aqueous solution using electropolymerisation by potential cycling, potentiostatically and galavanostatically. Characterisation of the modified electrodes was done by cyclic voltammetry and electrochemical impedance spectroscopy and the stability of the polymer films was probed. The coated electrodes were tested for application as hydrogen peroxide sensors, by oxidation and reduction. A novel polymer film was also formed by modification of CFE by co-electropolymerisation of EDOT and the phenazine dye neutral red (NR) -(PEDOT/PNR) with a view to enhancing the properties for sensor applications. It was found that hydrogen peroxide reduction at the PEDOT/PNR coated electrodes could be carried out at a less negative potential, the sensor performance comparing very favourably with that of other polymer-modified electrodes reported in the literature.

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Section: Carbon Film Electrode Pre-treatmentmentioning

confidence: 99%

Section: Electrode Modification By Edot Polymerisationmentioning

confidence: 99%

Section: Electrochemical Impedance Spectroscopymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Preparation and characterisation of poly(3,4-ethylenedioxythiophene) and poly(3,4-ethylenedioxythiophene)/poly(neutral red) modified carbon film electrodes, and application as sensors for hydrogen peroxide

Gonçalves

Ghica

Brett

2011

Electrochimica Acta

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“…The objective of this work was to develop an electrochemical enzyme biosensor, based on low-cost carbon-film resistor electrodes [23][24][25], for use in flow analysis. The redox mediators cobalt and copper hexacyanoferrates and poly(neutral red) were tested together with enzyme immobilisation by cross-linking with glutaraldehyde in the presence of bovine serum albumin or by a novel sol-gel GOx encapsulated biosensor with PNR mediator using a combination of oxysilane sol-gel precursors.…”

Section: E-mail Address: Brett@ciucpt (Cma Brett)mentioning

confidence: 99%

Design and application of a flow cell for carbon-film based electrochemical enzyme biosensors

Bârsan

Klincar

Batič

et al. 2007

Talanta

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A flow cell has been designed for use with an electrochemical enzyme biosensor, based on low-cost carbon-film electrodes. Three types of mediators were used: cobalt and copper hexacyanoferrates and poly(neutral red) (PNR), covered with glucose oxidase (GOx) immobilised by cross-linking with glutaraldehyde in the presence of bovine serum albumin or inside a oxysilane sol-gel network. Mixtures of sol-gel precursors were made from 3-aminopropyl-triethoxysilane (APTOS) together with methyltrimethoxysilane (MTMOS), methyltriethoxysilane (MTEOS), tetraethyloxysilane (TEOS) or 3-glycidoxypropyl-trimethoxysilane (GOPMOS), and the best chosen for encapsulation. Optimisation in batch mode, using amperometric detection at fixed potential, showed the PNR-GOx modified carbon-film electrodes to be best for flow analysis for both glutaraldehyde and sol-gel enzyme immobilisation. Both types of enzyme electrode were tested under flow conditions and the reproducibility and stability of the biosensors were evaluated. The biosensors were used for fermentation monitoring of glucose in grape must and interference studies were also performed.

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Development of redox‐mediated oxysilane sol–gel biosensors on carbon‐film electrode substrates

Pauliukaitė

Gouveia‐Caridade

Liess

et al. 2009

J of Applied Polymer Sci

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Three types of carbon-film electrodes, made from electrical resistors with 1.5-, 15-, and 140-X nominal resistances, were used to develop redox-mediated sol-gel biosensors, and the results were compared with those from previously investigated 2-X carbon-film electrodes. Two different redox mediators, copper hexacyanoferrate and poly(neutral red), were deposited onto the carbon-film electrodes, with the latter showing good electrochemical properties for electroanalytical applications, which were best on electrodes made from 15-X carbon-film resistors. It was not possible to deposit mediator film on the carbon-film resistor electrodes of 140-X nominal resistance. Glucose oxidase was immobilized on poly(-neutral red) modified electrodes with sol-gel encapsulation from a mixture of 3-glycidoxypropyltrimethoxysilane and methyltrimethoxysilane precursors at a volume ratio of 2 : 1. The best sensor electrochemical properties and response to glucose in model solution were found with electrodes constructed from 15-X resistors, although the stability under the same conditions was better in the biosensors constructed with 2-X nominal resistance electrodes.

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Characterization of Carbon Film Electrodes for Electroanalysis by Electrochemical Impedance

Cited by 62 publications

References 17 publications

Preparation and characterisation of poly(3,4-ethylenedioxythiophene) and poly(3,4-ethylenedioxythiophene)/poly(neutral red) modified carbon film electrodes, and application as sensors for hydrogen peroxide

Preparation and characterisation of poly(3,4-ethylenedioxythiophene) and poly(3,4-ethylenedioxythiophene)/poly(neutral red) modified carbon film electrodes, and application as sensors for hydrogen peroxide

Design and application of a flow cell for carbon-film based electrochemical enzyme biosensors

Development of redox‐mediated oxysilane sol–gel biosensors on carbon‐film electrode substrates

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