Glucose Biosensor Based on the Use of a Carbon Nanotube

GUILLERMINA L. LUQUE, NANCY F. FERREYRA, AND GUSTAVO A. RIVAS

Springer Wien

Año: 2006 vol. 152 p. 277 - 277

font size="3" face="AdvP41153C"> This work reports on the performance of new glucose biosensors based on the combination of the electrocatalytic properties of metals and carbon nanotubes towards the reduction of hydrogen peroxide with the biocatalytic activity of glucose oxidase (GOx). The bioelectrodes were obtained by dispersing the metal particles, enzyme and multi-wall carbon nanotubes within a mineral oil binder. The strong electrocatalytic activity of copper and iridium towards the reduction of hydrogen peroxide has made possible an important improvement in the sensitivity for the determination of glucose compared to the carbon nanotube composite without metals. A highly sensitive and selective amperometric detection of glucose becomes possible at very low potentials (0.100 V). The presence of the protein enables a better dispersion of the metals within the composite matrix, thus allowing an additional enhancement in the response to hydrogen peroxide. The infl