Open Access Nano Express

Modification of alumina matrices through chemical etching and electroless deposition of nano-Au array for amperometric sensing

Arūnas Jagminas1*, Julijana Kuzmarskytė1, Gintaras Valinčius2, Luciana Malferrari3 and Albertas Malinauskas1

Author Affiliations

1 Institute of Chemistry, Goštauto 9, 01108, Vilnius, Lithuania

2 Institute of Biochemistry, Mokslininkų 12, 08412, Vilnius, Lithuania

3 Instituto Nacionale di Fisica Nucleare, viale Berti-Pichat 6/2, 40127, Bologna, Italia

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Nanoscale Research Letters 2007, 2:130-134  doi:10.1007/s11671-007-9043-y

Published: 2 March 2007

Abstract

Simple nanoporous alumina matrix modification procedure, in which the electrically highly insulating alumina barrier layer at the bottom of the pores is replaced with the conductive layer of the gold beds, was described. This modification makes possible the direct electron exchange between the underlying aluminum support and the redox species encapsulated in the alumina pores, thus, providing the generic platform for the nanoporous alumina sensors (biosensors) with the direct amperometric signal readout fabrication.

Keywords:
EIS; Modification morphology; Nanoparticles; Porous alumina