Adsorption configurations of hydrocarbon ring molecules on GaAs(001)-c(4 x 4)

作者：Passmann R; Bruhn T; Nilsen T A; Fimland B O; Kneissl M; Esser N; Vogt P^*

来源：Physica Status Solidi B-Basic Solid State Physics, 2009, 246(7): 1504-1509.

DOI：10.1002/pssb.200945178

The understanding of self-assembly and bonding mechanisms of organic molecules on semiconductor surfaces represents a central research aspect in the investigation of novel organic/inorganic interfaces and their technological applicability. Here, we investigated the adsorption and bond formation of cyclopentene and 1,4-cyclohexadiene on a GaAs(001)-c(4 x 4) surface in order to clarify the influence of the number of intra-molecular C=C double bonds on the respective adsorption sites. For a determination of the adsorption configuration, the interfaces were characterized electronically and optically by synchrotron based X-ray photoelectron spectroscopy (SXPS), low energy electron diffraction (LEED) and reflectance anisotropy spectroscopy (RAS). The results reveal significantly different adsorption configurations for the two molecules. While cyclopentene bonds with a single covalent bond to the surface, 1,4-cyclohexadiene adsorbs onto the surface by the formation of multiple covalent bonds, e.g. bridge bonds.

• 出版日期2009-7