| Revista: | Anais da Academia Brasileira de Ciencias |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000436337 |
| ISSN: | 0001-3765 |
| Autores: | Iost, Rodrigo M1 Martins, Marccus V.A2 Crespilho, Frank N1 |
| Instituciones: | 1Universidade de Sao Paulo, Instituto de Quimica de Sao Carlos, Sao Carlos, Sao Paulo. Brasil 2Instituto Federal de Goias, Aparecida de Goiania, Goias. Brasil |
| Año: | 2019 |
| Volumen: | 91 |
| Número: | 4 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Aplicado, descriptivo |
| Resumen en inglés | The combination of UV-visible absorption and electrochemical experiments (spectroelectrochemistry) enables to obtain highly specific spectroscopic information (in situ and operando) from modified surfaces. However, such application can be limited by the self-absorbance, for example, when metallic nanoparticles are present on modified surfaces. Indium-tin oxide onto glass (ITO) is a typical electrode commonly used for spectroelectrochemistry; ITO is an oxide-based semiconductor, and in numerous applications it is necessary to promote the modification of the electrode surface without significant loss of transparency. Here, we report a simple strategy to obtain ITO electrodes modified with self-assembled polyelectrolytes and active dendritic gold nanoparticles (AuNPs), a combination of soft and metallic materials that results in electrodes with significant optical transparency. Self-assembled poly(sodium styrene sulfonate) and polyamidoamine dendrimer (PSS/PAMAN bilayer) were applied successfully as efficient platform for monodisperse dendritic AuNPs electrodeposition, and the electrode containing those materials shows substantial optical transmittance from 400nm to 800nm. The combination of transparency and the presence of AuNPs homogeneously dispersed start to be a practical approach to develop metal-based electrodes for spectroelectrochemistry |
| Disciplinas: | Ingeniería, Química |
| Palabras clave: | Electroquímica, Oxido de estaño indio, Nanopartículas de oro, Películas delgadas, Electrodepositación |
| Keyword: | Electrochemistry, Indium tin oxide, Gold nanoparticles, Thin films, Electrodeposition |
| Texto completo: | Texto completo (Ver HTML) Texto completo (Ver PDF) |
