One-dimensional confinement of organic molecules via selective adsorption on CaF1 versus CaF2

Janus‐Like 3D Tectons: Self‐Assembled 2D Arrays of Functional Units at a Defined Distance from the Substrate

“…Accessing the third dimension is mandatory for the progress of for example, molecular electronics and photonics, in which the proximity of adsorbed photoactive units with conducting substrates results in a fast quenching of electronic excitations. [4] To avoid this drawback, the decoupling between active molecular units and conducting substrates is currently achieved by lifting the molecule, either by covering the surface with a uniform insulating layer [5] or through the attachment of bulky chemical side groups (e.g. tert-butyl groups) to the molecule, which act as spacer legs that lead to the so-called molecular "landers".…”

Molecular Assembly and Self-Assembly: Molecular Nanoscience for Future Technologies

“…Self-organized nanostructures of an even higher complexity can be assembled by using substrates which are themselves produced by heteroepitaxial self-organization: Periodic (vicinal) step edges provide a template for selective decoration of 'nanowire patterns'. Material systems with mixed magnetic/ nonmagnetic metal/insulator or semi-conducting properties have been realized [17] and chemically selective deposition of a molecular adsorbate has been demonstrated [18]. After immobilization of molecular sub-monolayers on such well-prepared and characterized substrates, scanning probe microscopy (SPM) provides the 'eyes' and the 'hands' for performing experiments with individual molecules and molecular assemblies.…”

Selective adsorption of metallocenes on clean and chemically modified Si(111) surfaces

“…In an earlier publication, we interpreted strong bonding between organic molecules and CaF 1 /Si͑111͒ substrate in terms of energetics of the band gap of the substrate and the LUMO-HOMO gap of the adsorbate. 13 Intuitively, one would expect that the chemical bonding becomes stronger as the energy overlapping of the substrate band gap and the LUMO-HOMO gap of the adsorbates increases. Meanwhile, the strong interaction between the substrate orbital and either the LUMO ͑if in the valance band͒ or HOMO ͑if in the conduction band͒ requires favorable symmetry factors.…”