Preparation and Electrochemical Characterization of a Carbon Ceramic Electrode Modified with Ferrocenecarboxylic Acid

Skeika, Tatiane; Zuconelli, Cristiane R.; Fujiwara, Sérgio Toshio; Pessôa, Christiana Andrade

doi:10.3390/s110201361

Cited by 27 publications

(11 citation statements)

References 42 publications

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“…The inclusion of ferrocenium ions and presence of polar carboxylic groups-substituted ferrocene moieties within the polymer film improve the charge conductivity of the polymer composite and increase the charge transfer rate. Thus, enhanced kinetic process toward DA determination are attained using PEDOT/ FC1/Au composite compared to other reported composites in the literature [8,22,23,35,36].…”

Section: Electrochemistrymentioning

confidence: 85%

“…The data show that the matrix of the urine sample did not interfere with the determination of DA and relatively low limits of detection are realized. The DA assay using different modified electrodes is summarized in Table 4 and compared to the present proposed electrodes [8,12,22,33,[35][36][37][38][39][40][41][42]. Table 4 shows that the current sensors have better performance with low detection limit values.…”

Section: Determination Of Da At Pedot/mediator/au In Real Samplementioning

confidence: 99%

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Comparative Study of Metallocene Modified Gold Nanoparticles Polymer Electrodes for Effective Determination of Dopamine

Atta

Hassan

2020

Electroanalysis

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Here in we present a gold nanoparticles-poly (3,4-ethylenedioxythiophene) (PEDOT) modified with metallocene (ferrocene carboxylic acid (FC1), ferrocene (FC2) or cobaltocene (CC)) composites based electrochemical sensors for sensitive determination of dopamine (DA). Higher electron transfer and electrocatalytic activity towards DA are obtained with FC1. The presence of ferrocenium ions enhances the charge exchange rate and the carboxyl groups enhance the electronic conduction in the composite. DA is determined in presence of uric and ascorbic acids with excellent resolution and sensitivity. DA is determined in urine samples with limit of detection 19.6 nM, in the range of 4 to 160 μM.

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Section: Electrochemistrymentioning

confidence: 85%

Section: Determination Of Da At Pedot/mediator/au In Real Samplementioning

confidence: 99%

Comparative Study of Metallocene Modified Gold Nanoparticles Polymer Electrodes for Effective Determination of Dopamine

Atta

Hassan

2020

Electroanalysis

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“…This was significantly different (p = 10 −6 ) when compared to cleaned/bare electrodes. The drastic loss of current response is likely due to anion exclusion of the negatively charged FcCOO ‐ (as the anionic form of FcCOOH, pKa = 4.2)26 is electrostatically repulsed by dopant anions within the positively charged OO‐PPy film. When comparing the sensitivities of the bare electrode response to the polypyrrole coated electrode response, this ratio is approximately 12:1.…”

Section: Resultsmentioning

confidence: 99%

Bioactive Electroconductive Hydrogels Yield Novel Biotransducers for Glucose

Kotanen

Guiseppi‐Elie

2012

Macromolecular Symposia

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A class of bioactive, stimuli-responsive co-joined interpenetrating networks of inherently conductive polymers and highly hydrated hydrogels are being developed for implantable biodevice interfaces and for electric field induced release of elutable drugs. A novel microfabricated multidisc electrode array biotransducer intended for trauma management has been coated with poly(HEMA)-polypyrrole and characterized by cyclic voltammetry and chronoamperometry using ferrocene monocarboxylic acid (FcCOOH) as a probe molecule. Electrodeposition of polypyrrole (700 mV vs. Ag/AgCl) to 100 mC/cm 2 onto the hydrogel coated microdisc electrode array resulted in large and unstable background currents relative to uncoated electrodes. Overoxidation of polypyrrole (0-1.2 V vs. Ag/AgCl, 20 cylces, 100 mV/s) eliminates background current. Dose-response curves with FcCOOH showed that the transducer has good reproducibility with molecules of facile electrochemical properties. Polypyrrole provides interference screening of endogenous interferents in biosensor applications with a 12:1 rejection ratio. GOx was immobilized via electropolymerization of polypyrrole into hydrogel coated MDEA 5037s to yield biotransducers with sensitivity of 0.045 mA mM À1 cm À2 . Changes to improve biotransducer sensitivity are proposed.

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“…Furthermore, the capabilities of electron transfer on these three electrodes were also investigated by electrochemical impedance spectroscopy (EIS), and similar conclusions were drawn from cyclic voltammetry. Recently, Skeika and coworkers presented a carbon ceramic electrode prepared by the sol-gel technique and modified with ferrocenecarboxylic acid [ 60 ]. Characterization of a carbon ceramic electrode modified with ferrocenecarboxylic acid (designated as CCE/Fc) was done by electrochemical techniques and its detection ability for dopamine.…”

Section: Types Of Materials Used As Electron Mediators and Immobilizimentioning

confidence: 99%

Recent Advances in Polymeric Materials Used as Electron Mediators and Immobilizing Matrices in Developing Enzyme Electrodes

Moyo

Okonkwo

Agyei

2012

Sensors

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Different classes of polymeric materials such as nanomaterials, sol-gel materials, conducting polymers, functional polymers and biomaterials have been used in the design of sensors and biosensors. Various methods have been used, for example from direct adsorption, covalent bonding, crossing-linking with glutaraldehyde on composites to mixing the enzymes or use of functionalized beads for the design of sensors and biosensors using these polymeric materials in recent years. It is widely acknowledged that analytical sensing at electrodes modified with polymeric materials results in low detection limits, high sensitivities, lower applied potential, good stability, efficient electron transfer and easier immobilization of enzymes on electrodes such that sensing and biosensing of environmental pollutants is made easier. However, there are a number of challenges to be addressed in order to fulfill the applications of polymeric based polymers such as cost and shortening the long laboratory synthetic pathways involved in sensor preparation. Furthermore, the toxicological effects on flora and fauna of some of these polymeric materials have not been well studied. Given these disadvantages, efforts are now geared towards introducing low cost biomaterials that can serve as alternatives for the development of novel electrochemical sensors and biosensors. This review highlights recent contributions in the development of the electrochemical sensors and biosensors based on different polymeric material. The synergistic action of some of these polymeric materials and nanocomposites imposed when combined on electrode during sensing is discussed.

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Preparation and Electrochemical Characterization of a Carbon Ceramic Electrode Modified with Ferrocenecarboxylic Acid

Cited by 27 publications

References 42 publications

Comparative Study of Metallocene Modified Gold Nanoparticles Polymer Electrodes for Effective Determination of Dopamine

Comparative Study of Metallocene Modified Gold Nanoparticles Polymer Electrodes for Effective Determination of Dopamine

Bioactive Electroconductive Hydrogels Yield Novel Biotransducers for Glucose

Recent Advances in Polymeric Materials Used as Electron Mediators and Immobilizing Matrices in Developing Enzyme Electrodes

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