Role of surface elastic relaxations in an O-induced nanopattern on Pt(110)-(1 x 2).
Scanning tunneling microscopy shows that a nanopattern forms as the Pt(110)-(1 x 2) surface is exposed to oxygen at room temperature or above. The nanopattern consists of [11[over]0] oriented O-induced stripes assembling into a (11 x 2) superstructure at high O coverage. The stripes form because the O adsorption energy increases by expanding the Pt lattice along the ridges of the surface as compared to the bulk. From interplay with density functional theory calculations, we show that the O-induced nanoscale periodicity is caused by short-ranged elastic relaxations confined to the surface.
Helveg
S
S
Department of Physics and Astronomy, Interdisciplinary Nanoscience Center (iNANO), University of Aarhus, DK-8000 Aarhus C, Denmark.
Li
W X
WX
Bartelt
N C
NC
Horch
S
S
Laegsgaard
E
E
Hammer
B
B
Besenbacher
F
F