New Biosensig Platforms Based on Layer-by-Layer Deposition of Polyelectrolytes on a Nafion-Carbon Nanotubes Coated Glassy Carbon Electrode

G. A. RIVAS*; S. A. MISCORIA; JACQUES DESBRIERES; G. D. BARRERA

TALANTA

Elsevier

Año: 2007 vol. 71 p. 270 - 270

b> Abstract We are proposing for the first time the use of a Nafion/multi-walled carbon nanotubes dispersion deposited on glassy carbon electrodes (GCE) as a new platform for developing enzymatic biosensors based on the self-assembling of a chitosan derivative and different oxidases. The electrodes are obtained by deposition of a layer of Nafion/multi-wall carbon nanotubes dispersion on glassy carbon electrodes, followed by the adsorption of a chitosan derivative as polycation and glucose oxidase, l-aminoacid oxidase or polyphenol oxidase, as polyanions and biorecognition elements. The optimum configuration for glucose biosensors has allowed a highly sensitive (sensitivity = (0.28±0.02)AmM