Direct functionalization of Mn12-(methacrylate) clusters on Si(100): surface characterization and electrochemical properties
Guardado en:
| Autores: | , , , |
|---|---|
| Formato: | artículo original |
| Estado: | Versión publicada |
| Fecha de Publicación: | 2016 |
| Descripción: | The reaction of H–terminated Si(100) with methacrylate–substituted manganese carboxylate clusters [Mn12O12{CH2C(CH3)COO}16(H2O)4], [Mn12–(methacrylate)] via hydrosilylation afforded Mn12–(methacrylate)−Si(100). The chemically modified surface was studied with an atomic force microscope (AFM), X–ray photoelectron spectra (XPS), a cyclic voltammeter (CV) and electrochemical impedance spectra (EIS). XPS show several Mn and Si electronic signatures that indicate the tailoring of Mn12–(methacrylate) on the surface. The CV plot of Mn12–(methacrylate)−Si(100) has two irreversible cathodic waves at −0.76 and −0.44 V, assigned to Mn(IV)/Mn(III) and Mn(III)/Mn(II) processes. The calculated charge at –0.44 V was 3.14 x 10–5 C cm–2. An equivalent-circuit model was proposed based on EIS data and element circuit analysis. EIS show that the electronic and structural features of Mn12– (methacrylate) on a surface greatly influence the electron transfer. |
| País: | Portal de Revistas UCR |
| Institución: | Universidad de Costa Rica |
| Repositorio: | Portal de Revistas UCR |
| Lenguaje: | Español |
| OAI Identifier: | oai:portal.ucr.ac.cr:article/24917 |
| Acceso en línea: | https://revistas.ucr.ac.cr/index.php/cienciaytecnologia/article/view/24917 |
| Palabra clave: | Silicon(100) Mn12 cluster cyclic voltammetry X–ray photoelectron spectra (XPS) electrochemical impedance spectra (EIS) Electrochemistry Silicio (100) complejo Mn12 voltametría cíclica Espectroscopía fotoelectrónica de Rayos-X (XPS) Espectroscopía de impedancia electroquímica (EIS) Electroquímica |