alexa Design Of Optical And Electrochemical Sensors Based On Porphyrin Nanoparticulated Systems | 24592
ISSN: 2157-7439

Journal of Nanomedicine & Nanotechnology
Open Access

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4th International Conference on Nanotek & Expo

Irene Rezzano
Accepted Abstracts: J Nanomed Nanotechnol
DOI: 10.4172/2157-7439.S1.019
Abstract
Four different nanocomposites were prepared by combining Fe (III) and Cu (II) porphyrins. The nanostructured surfaces were obtained by sequential electrochemical deposition of the porphyrins (poly FeCuPP) onto immobilized gold nanoparticles or doped with multiple walled carbon nanotubes (MWCN) during deposition. These devices show great stability and interesting electrochemical properties that were thoroughly studied. The charge transfer properties of the nanostructured electrodes were evaluated by Electronic Impedance Spectroscopy (EIS). The electrocatalytic response to hydrogen peroxide was measured by cyclic voltammetry and amperometry. These techniques were used to evaluate the response to a variety of competitive and non competitive ligands, explaining their behavior in terms of the molecular interaction with the nanostructures. The morphology of the nanostructured electrodes was analyzed by SEM. On the other hand, tetra pyridil metalloporphyrins were deposited onto modified glass surfaces with gold nanoparticles and characterized by UV-visible, FTIR, Raman and SEM. This organization was utilized to evaluate the optical response of the chomophore to different ligands with the idea of develop high sensitivity optical sensors. Finally, nanorods of Fe (III) and Cu (II) porphyrins were prepared and characterized by UV-visible, FTIR, Raman and TEM. In this case, circular dichroism resulting very interesting since it allowed detecting asymmetric ligands included in the nanostructures.
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