Nicole Jaffrezic-Renault, Emeritus Research Director in CNRS, Institute of Analytical Sciences, University of Lyon, France
During the last ten years, the design of new enzyme-free electrochemical sensors based metal oxide nanoparticles has been described. Due to the electrocatalytic activity of these nanomaterials, these sensors allow the sensitive detection of different ions and molecules. They can replace advantageously enzymes due to their higher stability.
The presentation will be focused on the use of Kegging type polyoxometallates (POMs) for the detection of nitrite ions1 and of hydrogen peroxide. The association of POMs with single-wall carbon nanotubes (image) allowed the increase of the sensitivity of detection of hydrogen peroxide by a factor of 38.52. The involved charge transfer mechanism will be detailed.