Search

The co-deposition of 1,4-di(4′,4′′-pyridyl)benzene and 1,4-di(4′,4′′-bromophenyl)benzene on Si(111)–B surface leads to the formation of a highly regular self-assembly. The formation of this network has been investigated by STM and has been elucidated in the light of sergeants & soldiers principle due to halogen bonding on a silicon surface. [ABSTRACT FROM AUTHOR]

Hydrogen and halogen bonds have been associated for the growth of 2D compact supramolecular networks on a silicon surface. These interactions have been elucidated in a complete monolayer of a 4,4′′-dibromo-p-terphenyl (DBT) molecule on a Si(111)–B surface by combining scanning tunneling microscopy (STM) and density functional theory (DFT) calculations. [ABSTRACT FROM AUTHOR]

The formation of large assemblies on the Si(111)-B surface is discussed with the help of STM simulations and DFT calculations. Although highly regular assemblies of DTB10B along the Si row direction are observed, the existence of two herringbone isomers introduces a lower periodicity within the 2D molecular network. The formation of herringbone units is explained by weak intermolecular interactions while the 1D assembling depends mainly on the interactions of the C10 side chains with the Si(111)-B surface. [ABSTRACT FROM AUTHOR]

The adsorption of zwitterionic molecules on Si( 111 )-7 x 7 substrates has been probed by scanning tunneling microscopy and spectroscopy and studied via density-funetional-theory calculations. Experimental results obtained at room and low temperatures revealed the reconstruction of Si(l 11)-7 x 7 half-cells with molecular constructs accommodating three zwitterions. A structural model for the inscription of the Si( 111 )-7 x 7 half-cell with zwitterionic edifices is proposed and the nature of the interactions between the molecular assemblies and the surface is established thanks to joint experimental data and simulations. [ABSTRACT FROM AUTHOR]