Ordered supramolecular oligothiophene structures on passivated silicon surfaces

Abstract

The adsorption of brominated tetrathienoanthracene molecules (TBTTA) onto the Si(111) 3-Ag surface has been studied. The molecules were absorbed at room temperature and annealed up to 400C. One monolayer of Ag was used to passivate the Si surface. Evidence provided by the scanning tunneling microscope (STM) images indicates that at low coverage the molecules readily form 2-d structures...