In this PhD project will be developed electrochemical sensors based on nanomaterials (metallic nanoparticles of gold and platinum and nanomaterials based on carbon). The working electrodes (base electrodes ) that will be investigated are, glassy carbon, or composite electrode containing carbon nanotubes immobilized on polymeric film and boron-doped diamond. After construction and preparation of those electrodes, voltammetric studies will be carried out employing electrochemical probes (hexacyanoferrate (III) and potassium hexaminrutênio) and these electrodes will be applied in the determination environmental organic species and pharmaceutical analytes. The results will be compared with those obtained using the same metal macroelectrodes or unmodified (without metal nanoparticles) films. Thus, will be a search for a improvement in the analytical response in terms of reduction in the overpotential of the electrode which is frequently high, reducing interference from electroactive species (increase of selectivity) and also increasing the current magnitude (increase of the analytical signal) and/or sensitivity (increase of analytical curve slope.
News published in Agência FAPESP Newsletter about the scholarship: