Direct Measurement of the Attractive Interaction Forces on F-0 Color Centers on MgO(001) by Dynamic Force Microscopy

作者：Koenig Thomas; Simon Georg H; Martinez Umberto; Giordano Livia; Pacchioni Gianfranco; Heyde Markus^*; Freund Hans Joachim

来源：ACS Nano, 2010, 4(5): 2510-2514.

DOI：10.1021/nn100443n

• atomic force microscopy
• dynamic force microscopy
• scanning tunneling microscopy
• density functional theory
• magnesium oxide film
• color centers
• defect states
• adsorption sites

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.

• 出版日期2010-5