info:eu-repo/semantics/article
Spontaneous formation of metallic nanostructures on highly oriented pyrolytic graphite (HOPG): an ab initio and experimental study
Fecha
2014-05Registro en:
Juarez, Maria Fernanda; Fuentes, Ana Silvina; Soldano, Germán; Avalle, Lucia Bernardita; Santos, Elizabeth del Carmen; Spontaneous formation of metallic nanostructures on highly oriented pyrolytic graphite (HOPG): an ab initio and experimental study; Royal Society of Chemistry; Faraday Discussions; 172; 5-2014; 327-347
1364-5498
CONICET Digital
CONICET
Autor
Juarez, Maria Fernanda
Fuentes, Ana Silvina
Soldano, Germán
Avalle, Lucia Bernardita
Santos, Elizabeth del Carmen
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.