Scanning tunneling microscopy/spectroscopy study of adsorption of C60F36 molecules on the 7x7-Si(111) surfaceстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:Spatially resolved images of an individual C60F36 fluorofullerene molecules on Si(111)-7 x 7 surface have been obtained by means of scanning tunneling microscopy/spectroscopy (STM/STS). The presence of isomers with different symmetry (T, C (3), C (1)) has been revealed in STM investigation of initial adsorption stage of C60F36 on silicon surface Si(111)-(7 x 7). The adsorbed fluorofullerene molecule can occupy any adsorption site of silicon surface (corner site, faulted half, unfaulted half) that indicates for strong molecule-substrate interaction. The HOMO-LUMO gap of the adsorbed C60F36 molecules have been estimated from current image tunneling spectroscopy (CITS) and z(V) with engaged feedback measurements. The value of HOMO-LUMO gap observed experimentally was 3 eV. The C60F36 molecules adsorption on Si(111)-(7 x 7) surface was stable and kept equilibrium configuration during several hours.