Synergistic effect of reduced graphene oxide/azo-polymer layers on electrochemical performance and application as nonenzymatic chemiresistor sensors for detecting superoxide anion radicals
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.jelechem.2019.113520 http://hdl.handle.net/11449/199472 |
Resumo: | The present paper describes a nonenzymatic chemiresistor sensor based on an azo-polymer and reduced graphene oxide (rGO) as a resistive platform for superoxide radical detection. The sensorial platform was prepared on layer-by-layer-assembled films of poly(azo-Bismarck Brown Y) and reduced graphene oxide by cyclic voltammetry. The nanocomposite film exhibited interesting synergetic properties based on the redox properties of the azo-polymer combined with the good electronic conductivity and stability of graphene. The electrical conductivity mechanism of the graphene-polymer was analyzed by electrochemical impedance and compared to that of an electrode coated with only polymer. The conductance properties of the interlayer formed by π-π stacking between the conjugated structure of the polymer chains and the structure of the graphene sheet are dependent on the applied potential of the system. The performance of the poly(azo-BBY)/rGO film as a chemiresistor material for the sensing of superoxide anions was evaluated by impedance measurements at the applied potential of +0.30 in PBS (7.4). The charge transfer resistance values change substantially in the presence of superoxide in solution. The effect of superoxide on the resistivity of the device is attributed to changes in the oxidation state of the polymer. The impedance measurements in real time (chrono-impedance) with the poly(azo-BBY)/rGO sensor with different superoxide concentrations revealed good linearity behavior between the real impedance and the superoxide anion concentration (0.12–2.6 mmol L−1) with a detection limit of 81.0 μmol L−1. |
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spelling |
Synergistic effect of reduced graphene oxide/azo-polymer layers on electrochemical performance and application as nonenzymatic chemiresistor sensors for detecting superoxide anion radicalsAzo-polymerChemiresistorChrono-impedanceGraphenePi-conjugationSuperoxide detectionThe present paper describes a nonenzymatic chemiresistor sensor based on an azo-polymer and reduced graphene oxide (rGO) as a resistive platform for superoxide radical detection. The sensorial platform was prepared on layer-by-layer-assembled films of poly(azo-Bismarck Brown Y) and reduced graphene oxide by cyclic voltammetry. The nanocomposite film exhibited interesting synergetic properties based on the redox properties of the azo-polymer combined with the good electronic conductivity and stability of graphene. The electrical conductivity mechanism of the graphene-polymer was analyzed by electrochemical impedance and compared to that of an electrode coated with only polymer. The conductance properties of the interlayer formed by π-π stacking between the conjugated structure of the polymer chains and the structure of the graphene sheet are dependent on the applied potential of the system. The performance of the poly(azo-BBY)/rGO film as a chemiresistor material for the sensing of superoxide anions was evaluated by impedance measurements at the applied potential of +0.30 in PBS (7.4). The charge transfer resistance values change substantially in the presence of superoxide in solution. The effect of superoxide on the resistivity of the device is attributed to changes in the oxidation state of the polymer. The impedance measurements in real time (chrono-impedance) with the poly(azo-BBY)/rGO sensor with different superoxide concentrations revealed good linearity behavior between the real impedance and the superoxide anion concentration (0.12–2.6 mmol L−1) with a detection limit of 81.0 μmol L−1.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Department of Chemistry and Biochemistry School of Science and Technology - Sao Paulo State University (UNESP) Rua Roberto Simonsen 305Department of Physiotherapy School of Science and Technology - Sao Paulo State University (UNESP) Presidente PrudenteDepartment of Chemistry and Biochemistry School of Science and Technology - Sao Paulo State University (UNESP) Rua Roberto Simonsen 305Department of Physiotherapy School of Science and Technology - Sao Paulo State University (UNESP) Presidente PrudenteUniversidade Estadual Paulista (Unesp)Olean-Oliveira, André [UNESP]Pacheco, Jéssica C. [UNESP]Seraphim, Patricia M. [UNESP]Teixeira, Marcos F.S. [UNESP]2020-12-12T01:40:46Z2020-12-12T01:40:46Z2019-11-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1016/j.jelechem.2019.113520Journal of Electroanalytical Chemistry, v. 852.1572-6657http://hdl.handle.net/11449/19947210.1016/j.jelechem.2019.1135202-s2.0-85073073880Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of Electroanalytical Chemistryinfo:eu-repo/semantics/openAccess2024-06-18T18:44:42Zoai:repositorio.unesp.br:11449/199472Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-06T00:02:14.009942Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Synergistic effect of reduced graphene oxide/azo-polymer layers on electrochemical performance and application as nonenzymatic chemiresistor sensors for detecting superoxide anion radicals |
title |
Synergistic effect of reduced graphene oxide/azo-polymer layers on electrochemical performance and application as nonenzymatic chemiresistor sensors for detecting superoxide anion radicals |
spellingShingle |
Synergistic effect of reduced graphene oxide/azo-polymer layers on electrochemical performance and application as nonenzymatic chemiresistor sensors for detecting superoxide anion radicals Olean-Oliveira, André [UNESP] Azo-polymer Chemiresistor Chrono-impedance Graphene Pi-conjugation Superoxide detection |
title_short |
Synergistic effect of reduced graphene oxide/azo-polymer layers on electrochemical performance and application as nonenzymatic chemiresistor sensors for detecting superoxide anion radicals |
title_full |
Synergistic effect of reduced graphene oxide/azo-polymer layers on electrochemical performance and application as nonenzymatic chemiresistor sensors for detecting superoxide anion radicals |
title_fullStr |
Synergistic effect of reduced graphene oxide/azo-polymer layers on electrochemical performance and application as nonenzymatic chemiresistor sensors for detecting superoxide anion radicals |
title_full_unstemmed |
Synergistic effect of reduced graphene oxide/azo-polymer layers on electrochemical performance and application as nonenzymatic chemiresistor sensors for detecting superoxide anion radicals |
title_sort |
Synergistic effect of reduced graphene oxide/azo-polymer layers on electrochemical performance and application as nonenzymatic chemiresistor sensors for detecting superoxide anion radicals |
author |
Olean-Oliveira, André [UNESP] |
author_facet |
Olean-Oliveira, André [UNESP] Pacheco, Jéssica C. [UNESP] Seraphim, Patricia M. [UNESP] Teixeira, Marcos F.S. [UNESP] |
author_role |
author |
author2 |
Pacheco, Jéssica C. [UNESP] Seraphim, Patricia M. [UNESP] Teixeira, Marcos F.S. [UNESP] |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Olean-Oliveira, André [UNESP] Pacheco, Jéssica C. [UNESP] Seraphim, Patricia M. [UNESP] Teixeira, Marcos F.S. [UNESP] |
dc.subject.por.fl_str_mv |
Azo-polymer Chemiresistor Chrono-impedance Graphene Pi-conjugation Superoxide detection |
topic |
Azo-polymer Chemiresistor Chrono-impedance Graphene Pi-conjugation Superoxide detection |
description |
The present paper describes a nonenzymatic chemiresistor sensor based on an azo-polymer and reduced graphene oxide (rGO) as a resistive platform for superoxide radical detection. The sensorial platform was prepared on layer-by-layer-assembled films of poly(azo-Bismarck Brown Y) and reduced graphene oxide by cyclic voltammetry. The nanocomposite film exhibited interesting synergetic properties based on the redox properties of the azo-polymer combined with the good electronic conductivity and stability of graphene. The electrical conductivity mechanism of the graphene-polymer was analyzed by electrochemical impedance and compared to that of an electrode coated with only polymer. The conductance properties of the interlayer formed by π-π stacking between the conjugated structure of the polymer chains and the structure of the graphene sheet are dependent on the applied potential of the system. The performance of the poly(azo-BBY)/rGO film as a chemiresistor material for the sensing of superoxide anions was evaluated by impedance measurements at the applied potential of +0.30 in PBS (7.4). The charge transfer resistance values change substantially in the presence of superoxide in solution. The effect of superoxide on the resistivity of the device is attributed to changes in the oxidation state of the polymer. The impedance measurements in real time (chrono-impedance) with the poly(azo-BBY)/rGO sensor with different superoxide concentrations revealed good linearity behavior between the real impedance and the superoxide anion concentration (0.12–2.6 mmol L−1) with a detection limit of 81.0 μmol L−1. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-11-01 2020-12-12T01:40:46Z 2020-12-12T01:40:46Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1016/j.jelechem.2019.113520 Journal of Electroanalytical Chemistry, v. 852. 1572-6657 http://hdl.handle.net/11449/199472 10.1016/j.jelechem.2019.113520 2-s2.0-85073073880 |
url |
http://dx.doi.org/10.1016/j.jelechem.2019.113520 http://hdl.handle.net/11449/199472 |
identifier_str_mv |
Journal of Electroanalytical Chemistry, v. 852. 1572-6657 10.1016/j.jelechem.2019.113520 2-s2.0-85073073880 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal of Electroanalytical Chemistry |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
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1808129574875168768 |