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STM image of individual molecules on recorded at a sample bias and a tunnel current .
(Color online) (a) Typical molecule topography. , . (b) The associated adsorption model shows the molecule and the top two Silicon layers of the surface (adatoms and trimers).
(Color online) Adsorption model of the phthalocyanine molecule showing the electronic rearrangement. Two silicon DB’s of the SiC surface form covalent Si–N bonds with two conjugated nitrogen atoms of the molecule.
(Color online) Top and two side views of the optimized configuration of the unit cluster.
(Color online) STM topography showing a tip induced motion of a molecule during the scan. , . A discontinuity is visible in the middle of the topography (a). The corresponding molecule positions in the lower and upper parts of the topography are schematized in (b) and (c) showing a rotation around the Si2–N bond.
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