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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Author(s):
Vicentini, Fernando Campanha [1] ; Ravanini, Amanda E. [1] ; Figueiredo-Filho, Luiz C. S. [1] ; Iniesta, Jesus [2, 3] ; Banks, Craig E. [4] ; Fatibello-Filho, Orlando [1]
Total Authors: 6
Affiliation:
[1] Univ Fed Sao Carlos, Dept Chem, BR-13560970 Sao Carlos, SP - Brazil
[2] Univ Alicante, Dept Phys Chem, Alicante 03690 - Spain
[3] Univ Alicante, Inst Electrochem, Alicante 03690 - Spain
[4] Manchester Metropolitan Univ, Fac Sci & Engn, Sch Sci & Environm, Div Chem & Environm Sci, Manchester M1 5GD, Lancs - England
Total Affiliations: 4
Document type: Journal article
Source: Electrochimica Acta; v. 157, p. 125-133, MAR 1 2015.
Web of Science Citations: 54
Abstract

Three 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. (C) 2014 Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 10/20754-1 - Development of electrochemical sensors based on nanomaterials for the determination of interest pharmaceutical and environmental species
Grantee:Luiz Carlos Soares de Figueiredo Filho
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 13/16770-0 - Sensors development based on polymeric films and nanomaterials for several analytical applications
Grantee:Fernando Campanhã Vicentini
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 14/04284-6 - Electrochemical studies and application of sensors based on graphene or 3-D reticuled glassy carbon modified with metal nanoparticles for determination of pharmaceuticals and environmental analytes
Grantee:Luiz Carlos Soares de Figueiredo Filho
Support type: Scholarships in Brazil - Post-Doctorate