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Adsorption configurations of hydrocarbon ring molecules on GaAs(001)‐c(4 × 4)
Author(s) -
Passmann R.,
Bruhn T.,
Nilsen T. A.,
Fimland B. O.,
Kneissl M.,
Esser N.,
Vogt P.
Publication year - 2009
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200945178
Subject(s) - cyclopentene , adsorption , covalent bond , molecule , x ray photoelectron spectroscopy , chemistry , crystallography , low energy electron diffraction , synchrotron , materials science , electron diffraction , diffraction , organic chemistry , chemical engineering , physics , optics , nuclear physics , engineering , catalysis
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 × 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. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)