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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Optical paper-based sensor for ascorbic acid quantification using silver nanoparticles

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Autor(es):
Melo Ferreira, Danielle Cristhina [1] ; Giordano, Gabriela Furlan [1] ; dos Santos Penteado Soares, Caio Cesar [1] ; Afonso de Oliveira, Jessica Fernanda [2, 3] ; Mendes, Renata Kelly [4] ; Piazzetta, Maria Helena [1] ; Gobbi, Angelo Luiz [1] ; Cardoso, Mateus Borba [2, 3]
Número total de Autores: 8
Afiliação do(s) autor(es):
[1] Ctr Nacl Pesquisa Energia & Mat, LNNano Lab Nacl Nanotecnol, BR-13083970 Sao Paulo - Brazil
[2] Univ Estadual Campinas, Inst Quim, BR-13083970 Sao Paulo - Brazil
[3] Ctr Nacl Pesquisa Energia & Mat, LNLS, BR-13083970 Sao Paulo - Brazil
[4] Pontificia Univ Catolica Campinas, Fac Quim, BR-13012970 Sao Paulo - Brazil
Número total de Afiliações: 4
Tipo de documento: Artigo Científico
Fonte: Talanta; v. 141, p. 188-194, AUG 15 2015.
Citações Web of Science: 34
Resumo

In this paper, we demonstrate for the first time the use of silver nanoparticles (AgNPs) for colorimetric ascorbic acid (AA) quantification in a paper-based sensor. This device is constituted by spot tests modified with AgNPs and silver ions bordered by a hydrophobic barrier which provides quantitative and fast analysis of AA. In addition, this device is employed as point-of-care monitoring using a unique drop of the sample. AgNPs paper-based sensor changed from light yellow to gray color after the addition of AA due to nanoparticle growth and clusters formation. The color intensities were altered as a function of AA concentration which were measured by either a scanner or a homemade portable transmittance colorimeter. Under the selected measurement conditions, results presented limit of detection which was comparable to analytical laboratory-based methodologies. In addition, the sensitivity of our sensor was comparable to the standard titration method when real samples were investigated. (C) 2015 Elsevier B.V. All rights reserved. (AU)

Processo FAPESP: 11/21954-7 - Funcionalização de nanopartículas compósitas para aplicações biomédicas
Beneficiário:Mateus Borba Cardoso
Modalidade de apoio: Auxílio à Pesquisa - Regular
Processo FAPESP: 13/22429-9 - Síntese de nanopartículas de sílica mesoporosa funcionalizadas com anticorpos monoclonais: uma alternativa para o tratamento de linfomas Hodgkin (LH) e linfoma anaplásico de grandes células CD30+ (ALCL - CD30+)
Beneficiário:Jessica Fernanda Affonso de Oliveira
Modalidade de apoio: Bolsas no Brasil - Doutorado