Tyrosinase biosensor based on a glassy carbon electrode modified with multi-walled carbon nanotubes and 1-butyl-3-methylimidazolium chloride within a dihexadecylphosphate film

Vicentini, Fernando Campanhã; Janegitz, Bruno C.; Brett, Christopher M.A.; Fatibello‐Filho, Orlando

doi:10.1016/j.snb.2013.07.109

Cited by 92 publications

(44 citation statements)

References 49 publications

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“…For example, dihexadecylphosphate (DHP) is a hydrophobic surfactant which has two long hydrocarbon chains linked to a phosphate group that self-assemble into multiple bilayer structures similar to lipid bilayers and this structure allows stable films to be immobilised onto surface electrodes [28][29][30]. Also another common reticulant agent used is chitosan which produces films with high chemical stability and mechanical resistance; these chitosan films show other attractive characteristics such as excellent filmforming ability, high permeability, good adhesion, non-toxicity and susceptibility to various modifications with various chemical agents [31] and facilitates electron transfer due to their hydrophilic nature [32,33].…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Imparting improvements in electrochemical sensors: evaluation of different carbon blacks that give rise to significant improvement in the performance of electroanalytical sensing platforms

Vicentini

Ravanini

Figueiredo-Filho

et al. 2015

Electrochimica Acta

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125

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Imparting improvements in electrochemical sensors: evaluation of different carbon blacks that give rise to significant improvement in the performance of electroanalytical sensing platforms, Electrochimica Acta http://dx.doi.org/10.1016/j.electacta. 2014.11.204 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. Graphical abstract Imparting improvements in electrochemical sensorsThree different carbon black materials have been evaluated as a potential modifier, however, only one demonstrated an improvement in the electrochemical properties. The carbon black structures were characterised with SEM, XPS and Raman spectroscopy and found to be very similar to that of amorphous graphitic materials. The modifications utilised were constructed by three different strategies (using ultrapure water, chitosan and dihexadecylphosphate). The fabricated sensors are electrochemically characterised using N,N,N',N'-tetramethyl-para-phenylenediamine and both inner-sphere and outer-sphere redox probes, namely potassium ferrocyanide(II) and hexaammineruthenium(III) chloride, in addition to the biologically relevant and electroactive analytes, dopamine (DA) and acetaminophen (AP).Comparisons are made with an edge-plane pyrolytic graphite and glassy-carbon electrode and the benefits of carbon black implemented as a modifier for sensors within electrochemistry are explored, as well as the characterisation of their electroanalytical performances. We reveal significant improvements in the electrochemical performance (excellent sensitivity, faster heterogeneous electron transfer rate (HET)) over that of a bare glassy-carbon and edge-plane pyrolytic graphite electrode and thus suggest that there are substantial advantages of using carbon black as modifier in the fabrication of electrochemical based sensors. Such work is highly important and informative for those working in the field of electroanalysis where electrochemistry can provide portable, rapid, reliable and accurate sensing protocols (bringing the laboratory into the field), with particular relevance to those searching for new electrode materials.

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Section: Accepted Manuscriptmentioning

confidence: 99%

Imparting improvements in electrochemical sensors: evaluation of different carbon blacks that give rise to significant improvement in the performance of electroanalytical sensing platforms

Vicentini

Ravanini

Figueiredo-Filho

et al. 2015

Electrochimica Acta

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125

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“…This mixture was stirred for 12 h and then washed with deionized water until reaching pH 6.5-7.0. Afterwards, the MWCNTs were dried by heating at 70 C for 12 h [28].…”

Section: Functionalization Of the Mwcntsmentioning

confidence: 99%

Development of an Electrochemical Sensor Modified With MWCNT-Cooh and Mip for Detection of Diuron

Wong

Foguel

Khan

et al. 2015

Electrochimica Acta

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A B S T R A C TAn electrochemical sensor modified with a molecularly imprinted polymer (MIP) and carboxylfunctionalized multi-walled carbon nanotubes (MWCNT-COOH) was developed for the sensitive and selective detection of diuron in river water samples. An MIP was obtained by bulk polymerization using the best monomer (methacrylic acid) selected by computational simulation. The surface characteristics of the MIP and NIP (control polymer) samples were evaluated by means of surface area and pore volume determinations, using the BET method. The adsorption efficiency of the MIP was determined in adsorption tests that revealed high adsorption, relative to the control polymer. In addition, MWCNTs functionalized with carboxyl groups were used to enhance the performance of the sensor. Electrochemical studies of diuron using the MIP and MWCNT-COOH immobilized on a carbon paste electrode were performed with wave square voltammetry (SWV). The analytical parameters pH, buffer composition, and amounts of MWCNT-COOH and MIP were investigated and optimized. Excellent results were obtained with a linear range of between 5.2 Â 10 À8 and 1.25 Â 10 À6 mol L À1 , detection limit of 9.0 Â 10 À9 mol L À1 , and sensitivity of 5.1 Â10 5 mA L mol À1 . The MWCNT-COOH-MIP/CPE showed an enhanced electrochemical response, with sensitivity 7.9-fold greater than for a plain carbon paste electrode (CPE). Application of the sensor using river water samples resulted in recoveries between 96.1 and 99.5% and RSD <5% (n=3), demonstrating the reliability of this device.

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“…Some previously reported electrochemical sensors and biosensors that utilize DHP are presented in Table 1. In many cases, after the evaporation of the solvent, we observe the self-assembly of multiple bilayer films, similar to stacks of biomembranes, forming a very stable film on the electrode surface, probably due to hydrogen bondings [11].…”

mentioning

confidence: 95%

“…Other surfactants [50] have also been studied for the same purpose, including cetyltrimethylammonium bromide, cetylpyridinium chloride, didodecyldimethylammonium bromide, dimethyldioctadecylammonium chloride, phosphatidylcholines, and the zwitterionic dimyristoylphosphatidylcholine. Furthermore, the ability to form aqueous stable and homogeneous films allows DHP to be dispersed with hydrophobic molecules and nanostructured materials such as acetylene black (AB) [22], carbon nanotubes (CNTs) [11], and metals nanoparticles (NPs) [52].…”

mentioning

confidence: 99%

The use of dihexadecylphosphate in sensing and biosensing

Janegitz

Baccarin

Raymundo‐Pereira

et al. 2015

Sensors and Actuators B: Chemical

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Tyrosinase biosensor based on a glassy carbon electrode modified with multi-walled carbon nanotubes and 1-butyl-3-methylimidazolium chloride within a dihexadecylphosphate film

Abstract: Tyrosinase biosensor based on a glassy carbon electrode modified with multiwalled carbon nanotubes and 1-butyl-3-methylimidazolium chloride within a dihexadecylphosphate film

Cited by 92 publications

References 49 publications

Imparting improvements in electrochemical sensors: evaluation of different carbon blacks that give rise to significant improvement in the performance of electroanalytical sensing platforms

Imparting improvements in electrochemical sensors: evaluation of different carbon blacks that give rise to significant improvement in the performance of electroanalytical sensing platforms

Development of an Electrochemical Sensor Modified With MWCNT-Cooh and Mip for Detection of Diuron

The use of dihexadecylphosphate in sensing and biosensing

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