Single microparticle applied in magnetic-switchable electrochemistry

Autor(es)

Melo, Antonio F. A. A. ^[1] ; Carvalho, Vitor A. N. ^[1] ; Pagnoncelli, Kamila C. ^[1] ; Crespilho, Frank N. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Quim Sao Carlos, BR-13560970 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Electrochemistry Communications; v. 30, p. 79-82, MAY 2013.
• Citações Web of Science: 7

Resumo

In this work we demonstrated the micromanipulation of a single magnetic microparticle (Fe3O4) modified with Prussian blue (PB) for use in magnetic-switchable electrochemistry. A single Fe3O4-PB microparticle with 120 mu m was isolated in an electrochemical microcell (20 mu L), in which a fine control of PB electrochemical process on carbon electrode ((sic)=4.0 mm) was obtained. For cyclic voltammetty, redox processes attributed to PB/PW (Prussian blue/Prussian white) one electron redox couple were observed, however the capacitive currents were very high. On the other hand, by using differential pulse voltammetry, a maximum faradaic current for anodic peak of 200 nA cm(-2) at 0.06 V was observed. Several and high stable chronoamperograms were obtained by ``switch on{''} and ``switch off' magnetic commutative states for a single microparticle, showing that the system developed here can be very promising for application in electrochemistry. Crown Copyright (C) 2013 Published by Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 11/01541-0 - Desenvolvimento de bioanodos constituídos por glicose oxidase e frutose desidrogenase e suas formas recombinantes para aplicação em protótipos de biocélulas a combustível enzimáticas: geração de energia a partir da biomassa (cana-de-açúcar)
• Beneficiário: Frank Nelson Crespilho
• Modalidade de apoio: Auxílio à Pesquisa - Regular