Temat: 43.60.Mn - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Simulation of Reaction-Induced Phase Separation in Surface Alloy
Autorzy:: Zvejnieks, G.
Tornau, E.
Powiązania:: https://bibliotekanauki.pl/articles/1813485.pdf
Data publikacji:: 2008-03
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 68.43.Fg
68.43.Hn
68.43.Mn
64.60.Cn
Opis:: Using kinetic Monte Carlo method we simulate the dynamics of biatomic $Au_{0.3}Ni_{0.7}$ surface alloy separation on Ni(111) due to $Ni(CO)_4$ out-reaction. The experiment of Vestergaard et al. is modeled by counterbalancing dynamical processes and interactions between reactants. The simulations demonstrate step flow rate increase with CO coverage, $c_{CO},$ in qualitative agreement with the experiment only for $c_{CO}$ ≲ 0.45 monolayer. Moreover, we demonstrate both CO influence on reaction process and Au domain formation.
Źródło:: Acta Physica Polonica A; 2008, 113, 3; 1099-1102
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Simulation of Hydrogen-Induced Reconstruction of Oxygen on Pd(111)
Autorzy:: Petrauskas, V.
Tornau, E.
Powiązania:: https://bibliotekanauki.pl/articles/1813480.pdf
Data publikacji:: 2008-03
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 68.43.Fg
68.43.Hn
68.43.Mn
64.60.Cn
Opis:: The oxygen and hydrogen atoms co-adsorption experiment on Pd(111) is modelled using kinetic Monte Carlo method. We consider O-O, H-H, and O-H interactions and several kinetic processes (diffusion, surface and subsurface H-atoms exchange and water-formation reaction) leading to the phase transition $(2×2)_O$ → $(\sqrt(3)×\sqrt(3))_O$ with increase in H-coverage. We also demonstrate how reverse phase transition $(\sqrt(3)×\sqrt(3))_O$ → $(2×2)_O$ occurs due to hydrogen dissolution into subsurface in the absence of hydrogen gas. At higher temperature we observe the disappearance of $(2×2)_O$ oxygen islands due to water-formation reaction.
Źródło:: Acta Physica Polonica A; 2008, 113, 3; 1075-1078
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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