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

GUSTAVO A. RIVAS; MARÍA D. RUBIANES; MARÍA L. PEDANO; NANCY F. FERREYRA; GUILLERMINA L. LUQUE; MARCELA C. RODRÍGUEZ; SILVIA A. MISCORIA

Wiley-VCH Verlang GmbH & Co, KgaA, Weinheimv

Lugar: Las Cruces, New México, EEUU; Año: 2007 vol. 19 p. 823 - 823

p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 200%;">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 multi-walled 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 accomplished even without using permselective films or redox med