Propagation of a Reaction Front Accompanied by Island Formation: CO/Au/Ni(111)
Научная публикация
| Общее |
Язык:
Английский,
Жанр:
Статья (Full article),
Статус опубликования:
Опубликована,
Оригинальность:
Оригинальная
|
| Журнал |
Surface Science
ISSN: 0039-6028
|
| Вых. Данные |
Год: 2006,
Том: 600,
Номер: 19,
Страницы: L260-L264
Страниц
: 1
DOI:
10.1016/j.susc.2006.07.056
|
| Ключевые слова |
Au, CO, Computer simulations, Kinetics, Lateral interactions, Low index single crystal surfaces, Nanopatterning, Ni(1 1 1), Steps, Surface chemical reaction, Surface diffusion |
| Авторы |
Zhdanov Vladimir P.
1,2,3
,
Vang Ronnie T.
1,2
,
Knudsen Jan
1,2
,
Vestergaard Ebbe K.
1,2
,
Besenbacher Flemming
1,2
|
| Организации |
| 1 |
Aarhus University
|
| 2 |
Aarhus University
|
| 3 |
Институт катализа им. Г.К. Борескова СО РАН
|
|
Recent high-pressure scanning tunneling microscopy studies, performed at room temperature, have explicitly demonstrated the specifics of the CO-mediated removal of Ni atoms from the topmost layer of an Au/Ni(1 1 1) surface alloy. After an incubation period, the reaction is found to start at step edges. On each edge, a large fraction of Ni atoms is removed from the terrace in certain areas, whereas other areas are nearly intact after a given time. With increasing time, the former areas begin to overlap and the reaction front becomes somewhat more homogeneous. The Au atoms remaining behind the front form nm-sized islands. Here, we present Monte Carlo simulations reproducing all these observations.