Lateral forces during manipulation of a single C60 molecule on the Si()-2×1 surface

Abstract A method to measure lateral manipulation forces of a single molecule or a cluster was developed by combining scanning tunneling microscopy with a special lateral force sensor. The tunneling current and lateral force associated with manipulation of a single C 60 molecule on the Si(0 0 1)-2×1 surface were measured simultaneously during raster scanning of the probe. From the measured lateral force profiles the molecular hopping motion was analyzed and an estimate of the elastic energy stored in the molecule was determined.

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