INFIQC   05475
INSTITUTO DE INVESTIGACIONES EN FISICO- QUIMICA DE CORDOBA
Unidad Ejecutora - UE
artículos
Título:
Spontaneous formation of metallic nanostructures on Highly Oriented Pyrolytic Graphite (HOPG): an ab-initio and experimental study
Autor/es:
JUAREZ MARIA FERNANDA; FUENTES ANA SILVINA; GERMAN JAVIER SOLDANO; LUCÍA BERNARDITA AVALLE; ELIZABETH SANTOS
Revista:
FARADAY DISCUSSIONS
Editorial:
ROYAL SOC CHEMISTRY
Referencias:
Lugar: CAMBRIDGE; Año: 2014 vol. 172 p. 327 - 347
ISSN:
1364-5498
Resumen:
We have investigated the decoration of step-edges of HOPG by Ag, Au and Pt using experimental and theoretical approaches. Metallic nanowires can be formed on bare or functionalized step-edges. Energy dispersion analysis indicates the presence of oxygenated groups. The experiments showed that nanowires can be obtained with the three metals along the step-edges, but the shapes and morphologies are very different. We have found that the interaction between the metal wires and the carbon follows the sequence: Pt > Au > Ag. The electronic redistribution between the atoms participating in the bond between the metallic nanowire and the step-edges shows a complicated pattern. The density of electronic states projected on the different atoms indicates that there are different orbitals participating in the bonds.