Full Paper

Electroactive Nanostructured Membranes (ENM): Synthesis and Electrochemical Properties of Redox Mediator-Modified Gold Nanoparticles Using a Dendrimer Layer-by-Layer Approach

  1. Frank N. Crespilho1,3,
  2. M. Emilia Ghica2,
  3. Valtencir Zucolotto3,
  4. Francisco C. Nart1,
  5. Osvaldo N. Oliveira Jr.3,
  6. Christopher M. A. Brett2

Article first published online: 27 FEB 2007

DOI: 10.1002/elan.200603775

Issue

Electroanalysis

Electroanalysis

Special Issue: Nanobiomaterial Application in Electrochemical Analysis

Volume 19, Issue 7-8, pages 805–812, April 2007

Additional Information

How to Cite

Crespilho, Frank N., Ghica, M. Emilia., Zucolotto, V., Nart, Francisco C., Oliveira, Osvaldo N. and Brett, Christopher M. A. (2007), Electroactive Nanostructured Membranes (ENM): Synthesis and Electrochemical Properties of Redox Mediator-Modified Gold Nanoparticles Using a Dendrimer Layer-by-Layer Approach. Electroanalysis, 19: 805–812. doi: 10.1002/elan.200603775

Author Information

  1. 1

    Instituto de Química de São Carlos, Universidade de São Paulo, 13560-970, Brazil

  2. 2

    Departamento de Química, Universidade de Coimbra, 3004-535 Coimbra, Portugal

  3. 3

    Instituto de Física de São Carlos, Universidade de São Paulo, 13560-970, Brazil

Publication History

  1. Issue published online: 12 APR 2007
  2. Article first published online: 27 FEB 2007
  3. Manuscript Accepted: 22 NOV 2006
  4. Manuscript Received: 29 SEP 2006

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Keywords:

  • Layer by layer;
  • Gold nanoparticles;
  • Nanostructured membranes;
  • ENM;
  • Redox mediator;
  • Metal hexacyanoferrates;
  • Dendrimers

Abstract

The layer-by-layer (LbL) self-assembly process has become an important tool in the fabrication of nanostructured devices for electrochemical applications, especially in those cases where control at the molecular level is required. In this paper we present a system based on electroactive nanostructured membranes (ENM) with ITO-PVS/PAMAM-Au LbL electrodes, in which a redox mediator (Me) is electrodeposited around the Au nanoparticles to form an ITO-PVS/PAMAM-Au@Me system. The redox mediators used were Co, Fe, Ni and Cu hexacyanoferrates. The 3-bilayer ITO-PVS/PAMAM-Au@Me system was characterized electrochemically by cyclic voltammetry and electrochemical impedance spectroscopy. All hexacyanoferrate modified electrodes showed electrocatalytic activity towards hydrogen peroxide, thus demonstrating that this new approach can be used in biosensors and nanodevices, where a redox mediator is required.

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