The thermal behavior of a composite system formed by gold nanoclusters self-organized on a TiOx/Pt(111) ultrathin film is investigated via first-principles simulations. A cooperative phase transformation from a rectangular to an hexagonal phase occurs at high temperature, by which Au clusters do not coalesce, but rearrange their shape and positions together with the more mobile regions of the oxide. A model describing the atomistic processes behind this transformation is proposed that is in full agreement with available experimental data.
Cooperative Phase Transformation in Self-Assembled Metal-on-Oxide Arrays
Barcaro G;Fortunelli A;
2009
Abstract
The thermal behavior of a composite system formed by gold nanoclusters self-organized on a TiOx/Pt(111) ultrathin film is investigated via first-principles simulations. A cooperative phase transformation from a rectangular to an hexagonal phase occurs at high temperature, by which Au clusters do not coalesce, but rearrange their shape and positions together with the more mobile regions of the oxide. A model describing the atomistic processes behind this transformation is proposed that is in full agreement with available experimental data.File in questo prodotto:
| File | Dimensione | Formato | |
|---|---|---|---|
|
prod_40283-doc_1104.pdf
non disponibili
Descrizione: Cooperative Phase Transformation in Self-Assembled Metal-on-Oxide Arrays
Dimensione
1.49 MB
Formato
Adobe PDF
|
1.49 MB | Adobe PDF | Visualizza/Apri Richiedi una copia |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
