Multilayer Films Electrodes Consisted of Cashew Gum and Polyaniline Assembled by the Layer-by-Layer Technique: Electrochemical Characterization and Its Use for Dopamine Determination
We take advantage of polyelectrolyte feature exhibited by natural cashew gum (Anacardium occidentale L.) (CG), found in northeast Brazil, to employ it in the formation of electroactive nanocomposites prepared by layer-by-layer (LbL) technique. We used polyaniline unmodified (PANI) or modified with p...
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| Format: | Article |
| Language: | English |
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2012-01-01
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| Series: | International Journal of Analytical Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2012/923208 |
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| author | Sergio Bitencourt Araújo Barros Cleide Maria da Silva Leite Ana Cristina Facundo de Brito José Ribeiro Dos Santos Júnior Valtencir Zucolotto Carla Eiras |
| author_facet | Sergio Bitencourt Araújo Barros Cleide Maria da Silva Leite Ana Cristina Facundo de Brito José Ribeiro Dos Santos Júnior Valtencir Zucolotto Carla Eiras |
| author_sort | Sergio Bitencourt Araújo Barros |
| collection | DOAJ |
| description | We take advantage of polyelectrolyte feature exhibited by natural cashew gum (Anacardium occidentale L.) (CG), found in northeast Brazil, to employ it in the formation of electroactive nanocomposites prepared by layer-by-layer (LbL) technique. We used polyaniline unmodified (PANI) or modified with phosphonic acid
(PA), PANI-PA as cationic polyelectrolyte. On the other hand, the CG or polyvinyl sulfonic (PVS) acids were used as anionic polyelectrolytes. The films were prepared
with PANI or PANI-PA intercalated with CG or with PVS alternately resulting in four films with different sequences: PANI/CG PANI-PA/CG, PANI/PVS and PANI-PA/PVS, respectively. Analysis by cyclic voltammetry (CV) of the films showed that the presence of gum increases the stability of the films in acidic medium. The performance of the modified electrode of PANI-PA/CG was evaluated in electro analytical determination of dopamine (DA). The tests showed great sensitivity of the film for this analyte that was detected at 10−5 mol L−1. |
| format | Article |
| id | doaj-art-423eab2fe2be4d85b13470b8acc0aaef |
| institution | Kabale University |
| issn | 1687-8760 1687-8779 |
| language | English |
| publishDate | 2012-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Analytical Chemistry |
| spelling | doaj-art-423eab2fe2be4d85b13470b8acc0aaef2025-02-03T01:28:37ZengWileyInternational Journal of Analytical Chemistry1687-87601687-87792012-01-01201210.1155/2012/923208923208Multilayer Films Electrodes Consisted of Cashew Gum and Polyaniline Assembled by the Layer-by-Layer Technique: Electrochemical Characterization and Its Use for Dopamine DeterminationSergio Bitencourt Araújo Barros0Cleide Maria da Silva Leite1Ana Cristina Facundo de Brito2José Ribeiro Dos Santos Júnior3Valtencir Zucolotto4Carla Eiras5Departamento de Química, Centro de Ciências da Natureza (CCN), Universidade Federal do Piauí (UFPI), 64049550 Teresina, PI, BrazilDepartamento de Química, Centro de Ciências da Natureza (CCN), Universidade Federal do Piauí (UFPI), 64049550 Teresina, PI, BrazilSEDIS, Universidade Federal do Rio Grande do Norte (UFRN), Caixa Postal 1524, Campus Universitário Lagoa Nova, 59072970 Natal, RN, BrazilDepartamento de Química, Centro de Ciências da Natureza (CCN), Universidade Federal do Piauí (UFPI), 64049550 Teresina, PI, BrazilNanomedicine and Nanotoxicology Laboratory, IFSC, University of São Paulo, São Carlos, SP, BrazilNúcleo de Pesquisa em Biodiversidade e Biotecnologia, BIOTEC, Campus Ministro Reis Velloso, CMRV, Universidade Federal do Piauí, UFPI, 64202020 Parnaíba, PI, BrazilWe take advantage of polyelectrolyte feature exhibited by natural cashew gum (Anacardium occidentale L.) (CG), found in northeast Brazil, to employ it in the formation of electroactive nanocomposites prepared by layer-by-layer (LbL) technique. We used polyaniline unmodified (PANI) or modified with phosphonic acid (PA), PANI-PA as cationic polyelectrolyte. On the other hand, the CG or polyvinyl sulfonic (PVS) acids were used as anionic polyelectrolytes. The films were prepared with PANI or PANI-PA intercalated with CG or with PVS alternately resulting in four films with different sequences: PANI/CG PANI-PA/CG, PANI/PVS and PANI-PA/PVS, respectively. Analysis by cyclic voltammetry (CV) of the films showed that the presence of gum increases the stability of the films in acidic medium. The performance of the modified electrode of PANI-PA/CG was evaluated in electro analytical determination of dopamine (DA). The tests showed great sensitivity of the film for this analyte that was detected at 10−5 mol L−1.http://dx.doi.org/10.1155/2012/923208 |
| spellingShingle | Sergio Bitencourt Araújo Barros Cleide Maria da Silva Leite Ana Cristina Facundo de Brito José Ribeiro Dos Santos Júnior Valtencir Zucolotto Carla Eiras Multilayer Films Electrodes Consisted of Cashew Gum and Polyaniline Assembled by the Layer-by-Layer Technique: Electrochemical Characterization and Its Use for Dopamine Determination International Journal of Analytical Chemistry |
| title | Multilayer Films Electrodes Consisted of Cashew Gum and Polyaniline Assembled by the Layer-by-Layer Technique: Electrochemical Characterization and Its Use for Dopamine Determination |
| title_full | Multilayer Films Electrodes Consisted of Cashew Gum and Polyaniline Assembled by the Layer-by-Layer Technique: Electrochemical Characterization and Its Use for Dopamine Determination |
| title_fullStr | Multilayer Films Electrodes Consisted of Cashew Gum and Polyaniline Assembled by the Layer-by-Layer Technique: Electrochemical Characterization and Its Use for Dopamine Determination |
| title_full_unstemmed | Multilayer Films Electrodes Consisted of Cashew Gum and Polyaniline Assembled by the Layer-by-Layer Technique: Electrochemical Characterization and Its Use for Dopamine Determination |
| title_short | Multilayer Films Electrodes Consisted of Cashew Gum and Polyaniline Assembled by the Layer-by-Layer Technique: Electrochemical Characterization and Its Use for Dopamine Determination |
| title_sort | multilayer films electrodes consisted of cashew gum and polyaniline assembled by the layer by layer technique electrochemical characterization and its use for dopamine determination |
| url | http://dx.doi.org/10.1155/2012/923208 |
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