Carbon Nanotubes Paste Electrodes. A New Alternative for the Development of Electrochemical Sensors”.

G. A. RIVAS, M. D. RUBIANES, M. L. PEDANO, N. F. FERREYRA, G. L. LUQUE, M. C. RODRIGUEZ, S. A. MISCORIA. ELECTROANALYSIS

ELECTROANALYSIS

Año: 2007 vol. 19 p. 823 - 823

1040-0397

font face="AdvTTR" size="1"> In this work we summarize the recent activities of our group regarding the analytical performance of a new composite material, the so-called carbon nanotubes paste electrode (CNTPE) obtained by dispersion of multiwall carbon nanotubes in mineral oil. The electrocatalytic properties towards different redox systems, especially those involved in important enzymatic reactions are discussed. Significant shifting in the overpotentials for the oxidation and/or reduction of hydrogen peroxide, NADH, phenol, catechol, dopamine, ascorbic acid, uric acid and hydroquinone are obtained at CNTPE in comparison with the analogous graphite paste electrode (CPE). The usefulness of the electrode as a matrix for immobilizing enzymes is also demonstrated. Highly sensitive and selective glucose quantification is accom