Direct measurement of the attractive interaction forces on F0 color centers on MgO(001) by dynamic force microscopy.
Defect sites on oxide surfaces play a dominant role in surface chemistry. The direct atomistic study of these sites is important but very difficult. We have mimicked the adsorbate-defect interaction by a dynamic force microscope tip measuring the interaction with a color center (F(0)) on the MgO(001) surface. The experimental findings, complemented by density functional theory calculations, show a highly attractive adsorbate-defect interaction and a charge transfer at a critical distance.
König
Thomas
T
Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195 Berlin, Germany.
Simon
Georg H
GH
Martinez
Umberto
U
Giordano
Livia
L
Pacchioni
Gianfranco
G
Heyde
Markus
M
Freund
Hans-Joachim
HJ