Characterization of modified solid electrodes with organized thin films of a tetra-substituted zinc phthalocyanine
Organized thin films of a zinc phthalocyanine have been deposited on solid electrodes using several techniques, such as drop casting, immersion and Langmuir-Blodgett (LB), at several conditions, and their electrochemical response has been studied by cyclic voltammetry and differential pulse voltamme...
| Autores: | , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2022 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/363828 |
| Acceso en línea: | https://hdl.handle.net/2117/363828 https://dx.doi.org/10.1016/j.tsf.2022.139145 |
| Access Level: | acceso abierto |
| Palabra clave: | Electrochemistry Thin films, Multilayered Zinc Self-organized films Drop casting Atomic Force Microscopy Langmuir-Blodgett deposition Zinc phthalocyanine Electroquímica Pel·lícules fines Àrees temàtiques de la UPC::Enginyeria química::Química física::Electroquímica |
| Sumario: | Organized thin films of a zinc phthalocyanine have been deposited on solid electrodes using several techniques, such as drop casting, immersion and Langmuir-Blodgett (LB), at several conditions, and their electrochemical response has been studied by cyclic voltammetry and differential pulse voltammetry. Topographical images by Atomic Force Microscopy reveal that the structure of immersion and LB films is uniform, showing granular aggregates and continuous layers, respectively. The electrochemical response of both kind of films is similar and shows peaks that can be correlated with redox processes occurring in the phthalocyanine ring. Drop casting films present a different topography, with rod-like structures, and the voltammograms show an enhancement in the peaks at positive potentials, which has been attributed to the influence of the atmospheric oxygen adsorbed during the film deposition. Immersion and LB films have also shown an increase in the oxidation current intensity of the voltammetric response after exposition to molecular oxygen. These results point to a possible application of these organized t-BuZnPc thin films as electrochemical oxygen sensors |
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