Giessibl, Franz J. and Hembacher, Stefan and Bielefeldt, Hartmut and Mannhart, Jochen (2000) Subatomic Features on the Silicon (111)-(7×7) Surface Observed by Atomic Force Microscopy. Science 289 (5478), pp. 422-425.
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The atomic force microscope images surfaces by sensing the forces between a sharp tip and a sample. If the tip-sample interaction is dominated by short-range forces due to the formation of covalent bonds, the image of an individual atom should reflect the angular symmetry of the interaction. Here, we report on a distinct substructure in the images of individual adatoms on silicon (111)-(7×7), two crescents with a spherical envelope. The crescents are interpreted as images of two atomic orbitals of the front atom of the tip. Key for the observation of these subatomic features is a force-detection scheme with superior noise performance and enhanced sensitivity to short-range forces.
|Institutions:||Physics > Institute of Experimental and Applied Physics > Chair Professor Giessibl > Group Franz J. Giessibl|
|Subjects:||500 Science > 530 Physics|
|Created at the University of Regensburg:||Unknown|
|Deposited On:||10 Jul 2012 13:57|
|Last Modified:||13 Sep 2012 12:27|