adparticle on the surface is moved with the STM tip
along the surface to the desired place without losing contact with the substrate. In lateral manipulation three basic
different modes can be discerned: (1) pulling where the adparticle
discontinuously follows the tip from one adsorption
site to another due to attractive forces; (2) pushing where the adparticle moves discontinuously in front of the tip due
to repulsive interaction; and (3) sliding where the adparticle
is trapped under the tip and follows its motion instantaneously and
continuously. See also Sections 3 and 4.