| Texto completo | |
| Autor(es): |
de Lima, Lucas F.
[1]
;
Maciel, Cristiane C.
[2]
;
Ferreira, Andre L.
[1]
;
de Almeida, Jessica C.
[2]
;
Ferreira, Marystela
[1]
Número total de Autores: 5
|
| Afiliação do(s) autor(es): | [1] Fed Univ Sao Carlos UFSCar, Ctr Sci & Technol Sustainabil CCTS, BR-18052780 Sorocaba, SP - Brazil
[2] Sao Paulo State Univ Julio de Mesquita Filho UNES, Sorocaba, SP - Brazil
Número total de Afiliações: 2
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Materials Letters; v. 262, MAR 1 2020. |
| Citações Web of Science: | 0 |
| Resumo | |
In this work, we report the analytical detection of tartrazine through differential pulse voltammetry (DPV) using gold nanoparticles (AuNPs) and Nickel(II)-phthalocyanine-tetrasulfonic (NiTsPc). The Layer-by-Layer (LbL) film was constructed following the Au-(AuNPs-PAH/NiTsPc)(5) architecture. The electric current characteristics of this sensor were verified by electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV). As a result of these measurements, a large and well-defined redox peak was obtained, indicating a significant enhancement in electron transfer. Excellent sensing performance was achieved with high sensitivity (25.79 +/- 0.47 (mu A cm(-2)) (mu mol L-1)(-1) and 8.80 +/- 0.36 (mu A cm(-2)) (mu mol L-1)(-1)), low limit of detection (0.055 mu mol L-1 and 0.122 mu mol L-1), and excellent anti-interference and repeatability behavior. The Au electrode modified with the LbL film was also evaluated in commercially available juice samples with a recovery range from 97.74% to 108.26%. (C) 2019 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: | 16/19387-0 - Desenvolvimento de filmes nanoestruturados automontados (layer-by-layer) e langmuir-blodgett (lb) incorporando emodina para sistemas carreadores |
| Beneficiário: | Marystela Ferreira |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 18/04061-8 - Filmes automontados de polipirrol e nanopartículas de magnetita na determinação analítica de parabenos |
| Beneficiário: | Lucas Felipe de Lima |
| Modalidade de apoio: | Bolsas no Brasil - Mestrado |