Molecules on silicon Si(111)-B


Aim : realize supramolecular self-assemblies on silicon surface Si(111)-B

 

Since 2010, the group strengthened its works and obtained quasi-unlimited networks recovering silicon surfaces. This aim has been achieved by proposing a molecular approach which both combines on the one hand an agreement between the molecule symmetry and the surface symmetry, and on the other hand an agreement between the inter-atomic distance of the surface adatoms and the inter-atomic distance of the molecule subunits. The necessary precision for such agreements is about ten picometers. This approach was published in Angewandte Chemie International Edition in 2011.

Moreover, we demonstrated that it was possible to realize multi-componants assemblies by filling nanopores on the "host-guest" concept. All these works were achieved within a temperature range from 100 to 450 K, which is a remarkable aspect because they differentiate from studies on metallic surfaces which are generally realized between 4 and 77 K. This year, we demonstrated the leading role of the molecules-molecules interactions to generate artificial assemblies. These results have been the subject of a publication in Physical Review Letters and a CNRS press release in February, 2015. These works were financed by three ANR projects : SUPRAMEM (leader F. Chérioux), MISS and AUTOMOL.

 

Evolution of the molecular network compactness according to local recovery rate