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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Highly stable magnetite modified with chitosan, ferrocene and enzyme for application in magneto-switchable bioelectrocatalysis

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Author(s):
Melo, Antonio F. A. A. [1] ; Luz, Roberto A. S. [2] ; Iost, Rodrigo M. [1] ; Nantes, Iseli L. [2] ; Crespilho, Frank N. [1]
Total Authors: 5
Affiliation:
[1] Univ Sao Paulo, Inst Quim Sao Carlos, BR-13560970 Sao Carlos, SP - Brazil
[2] Univ Fed ABC, Ctr Ciencias Nat & Humanas, BR-09210170 Santo Andre, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Journal of the Brazilian Chemical Society; v. 24, n. 2, p. 285-294, FEB 2013.
Web of Science Citations: 7
Abstract

Magnetic fields have been used in Bioelectrochemistry to carry enzymes or redox mediators immobilized on magnetite (Fe3O4) to the electrodes surface, providing a switchable control of faradaic current from biocatalysis. In this work, it is reported an advance in the magnetic control of bioelectrochemical reactions, by construction of a system containing simultaneously a magnetic particle (for controlled driving), an enzyme (for biocatalysis) and a redox mediator (for mediation of electron transfer). The advance was attained by synthesis of a new material (Fe3O4-Chi-Fc/GOx) that consists of Fe3O4 particles modified with insoluble ferrocene (Fc) and chitosan (Chi) cross-linked with glucose oxidase (GOx). When this material was used in electrochemical studies, an increase of 70% was observed in the catalytic current of glucose oxidation when 0.24 T was applied perpendicularly to electrode plane. This is the first time that a control of the bioelectrocatalytic process was achieved using enzyme, mediator and magnetite in a unique system switched by a magnetic field. (AU)

FAPESP's process: 09/15558-1 - Biomolecules and cellular system interaction with nanostructures 0D, 1D and 2D by using electrochemical methods
Grantee:Frank Nelson Crespilho
Support Opportunities: Regular Research Grants
FAPESP's process: 11/01541-0 - Development of bioanodes composed by glucose oxidase and fructose dehydrogenase and its recombinant structures for aplication in prototype of biofuel cell: power generation from biomass (sugar cane)
Grantee:Frank Nelson Crespilho
Support Opportunities: Regular Research Grants