Layer-by-layer composite film of nickel phthalocyanine and montmorillonite clay for synergistic effect on electrochemical detection of dopamine

Autor(es)

de Lucena, Nathalia C. ^[1] ; Miyazaki, Celina M. ^[1] ; Shimizu, Flavio M. ^[2] ; Constantino, Carlos J. L. ^[3] ; Ferreira, Marystela ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Sorocaba, SP - Brazil

^[2] Univ Sao Paulo, Sao Carlos, SP - Brazil

^[3] Univ Estadual Paulista, FCT, Presidente Prudente, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Applied Surface Science; v. 436, p. 957-966, APR 1 2018.
• Citações Web of Science: 10

Resumo

Dopamine (DA) abnormal levels are related to diseases which makes important the development of fast, reliable, low-cost and sensitive devices for diagnosis and pharmaceutical controls. Nanostructured film composite of sodium montmorillonite clay (Na+MMT) and nickel phthalocyanine (NiTsPc) was selfassembled by layer-by-layer (LbL) technique and applied as electrochemical sensor for DA in the presence of common natural interferents as ascorbic acid (AA) and uric acid (UA). Three different LbL architecture films were investigated: LbL films of clay (PEI/Na+MMT) and phthalocyanine (PEI/NiTsPc) in a bilayer structure with a conventional polyelectrolyte (PEI) and a composite film formed by both materials to verify the synergistic effect in the LbL film in a quadri-layer assembly (PEI/Na+MMT/PEI/NiTsPc). Structural characterization indicated molecular level interactions between the layers forming the LbL films. The ITO/(PEI/Na+MMT/PEI/NiTsPc)(10) electrode exhibited a LOD of 1.0 mu mol L-1 and linear range 5-150 mu mol L-1. (C) 2017 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 14/15093-7 - Estudos de sistemas nanoestruturados por ressonância plasmônica de superfície (SPR): aplicações em biossensoriamento
• Beneficiário: Celina Massumi Miyazaki
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 13/14262-7 - Filmes nanoestruturados de materiais de interesse biológico
• Beneficiário: Osvaldo Novais de Oliveira Junior
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 12/15543-7 - Biossensores para detectar Escherichia coli usando o conceito de línguas eletrônicas
• Beneficiário: FLAVIO MAKOTO SHIMIZU
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado