Self-assembled molecular corrals on a semiconductor surface

A Stable Room‐Temperature Molecular Assembly of Zwitterionic Organic Dipoles Guided by a Si(111)‐7×7 Template Effect

“…[4] Polanyi and co-workers, for example, have shown that the adsorption of chlorododecane on Si(111)-7 7 at room temperature leads to the formation of a bistable dimeric corral of self-assembled molecules and have demonstrated on/off electronic switching of a single silicon adatom using molecular field effects. [5] These authors have also described a new strategy for preventing the dissociation of haloalkanes on Si(111)-7 7 up to 373 K. This stability is ensured thanks to the formation of dimeric circular corrals that override the molecule-substrate interactions. [5] Herein, we propose a new concept for the room-temperature deposition of p-conjugated organic molecules, without any modification of their elec-tronic structure, at specific adsorption sites on the surface of the semiconductor Si(111)-7 7 by adsorbing p-conjugated zwitterionic molecules on this semiconductor surface.…”

“…[5] These authors have also described a new strategy for preventing the dissociation of haloalkanes on Si(111)-7 7 up to 373 K. This stability is ensured thanks to the formation of dimeric circular corrals that override the molecule-substrate interactions. [5] Herein, we propose a new concept for the room-temperature deposition of p-conjugated organic molecules, without any modification of their elec-tronic structure, at specific adsorption sites on the surface of the semiconductor Si(111)-7 7 by adsorbing p-conjugated zwitterionic molecules on this semiconductor surface. The presence of a negative charge on the target molecules offsets the electrophilic character of the Si(111)-7 7 adatoms and preserves the p skeleton of the organic molecules after deposition.…”

Molecular nano-arches on silicon

“…The formation of the dimers was found to be energetically favorable. Furthermore, molecular dimers formed on the Si(1 1 1)-7 · 7 surface due to dispersion forces have been observed recently [16][17][18].…”

Single Molecular Machines on Semiconductor Surfaces

“…In this last part, we propose to describe the switching of an adatom (of the surface) induced by molecular adsorption. Polanyi et al [63,64] have investigated the adsorption of chlorododecane on the Si(111)-(7 × 7) surface. These molecules are non-covalently adsorbed on the surface.…”