Artículos de revistas
An STM and Monte Carlo study of the AlF3 film growth on Cu(111)
Fecha
2015-06Registro en:
Candia, Adriana; Gómez, L.; Vidal, Ricardo Alberto; Ferrón, J.; Passeggi, Mario Cesar Guillermo; An STM and Monte Carlo study of the AlF3 film growth on Cu(111); IOP Publishing; Journal of Physics D: Applied Physics; 48; 26; 6-2015; 265305-265305
0022-3727
Autor
Candia, Adriana
Gómez, L.
Vidal, Ricardo Alberto
Ferrón, J.
Passeggi, Mario Cesar Guillermo
Resumen
We report measurements of AlF3 thin film growth on Cu(1 1 1) at room temperature by means of scanning tunneling microscopy. The growth proceeds by the formation of fractal islands characterized by a very corrugated surface. Through uncovered zones and island density we determined a diffusion length of ~25 nm for the adsorbed molecules. Even with this large diffusion length the step-edges do not appear fully decorated. These experimental results are contrasted with simulations based on a limited diffusion aggregation model and Metropolis Monte Carlo.
Additionally, the results of the AlF3 sub-monolayer growth on Cu(1 1 1) are compared with our previous results on Cu(1 0 0), finding that both systems show more differences than similarities. Thus, while the growth on Cu(1 0 0) shows fully decorated step-edges, on Cu(1 1 1), they present non-covered zones even at coverages as high as 0.7 monolayers. Supported on MC simulations we suggest that the qualitative difference between both faces is due to different step-edge behaviour.