IFIS - LITORAL   24734
INSTITUTO DE FISICA DEL LITORAL
Unidad Ejecutora - UE
congresos y reuniones científicas
Poster: An STM and Monte Carlo study of the AlF3 film growth on Cu(111)
CANDIA, A.E.; GÓMEZ, L.; VIDAL, R.A.; FERRÓN, J.; PASSEGGI (JR.), M.C.G.
Foz do Iguaçu (PR), 24-28 Maio 2015
Encuentro; XXXVIII ENFMC, Encontro Nacional de Física da Matéria Condensada, Brazilian Physical Society Meeting; 2015
Sociedade Brasileira de Física
We report measurements of AlF3 film growth on Cu(111) 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 the Limited Diffusion Aggregation model and Metropolis Monte Carlo.As well, the results of the AlF3 sub-monolayers growth on Cu(111) are compared with our previous results on Cu(100), finding that both systems show more differences than similarities. Thus, while the growth on Cu(100) shows fully decorated step-edges, on Cu(111), they present non-covered zones even at coverages as high as 0.7 monolayers. Supported on the MC simulations we suggest that the qualitative difference between both faces is due to different step-edge behavior.Expuso: CANDIA, A.E.