期刊
SURFACE SCIENCE
卷 603, 期 2, 页码 354-358出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.susc.2008.11.019
关键词
Angle-resolved photoelectron spectroscopy; Organic molecules; Adsorption; Au(111); Physisorption; Noble metals; NTCDA; PTCDA
资金
- Deutsch Forschungsgemeinschaft [1469/4-4]
- Bundesministerium fur Bildung und Forschung [05KS7WW1]
The modification of the Au(111) Shockley-type surface state by an adsorbed monolayer of large pi-conjugated molecules was investigated by high-resolution angle-resolved photoelectron spectroscopy (ARPES). We determined binding energy, band mass, and Rashba-splitting and discuss the results in the context of rare-gas adsorption on noble metals. This comparison allows the determination of the bonding strength of the adsorbates, found to be physisorptive with derived binding energies per molecule of 2.0 eV for perylene-tetracarboxylic-dianhydride (PTCDA) and 1.5 eV for naphtalene-tetracarboxylic-dianhydride (NTCDA). We will also present a superstructure model for the NTCDA/Au(111) system, deduced from low energy electron diffraction images (LEED) in combination with substrate band-backfolding. (C) 2008 Elsevier B.V. All rights reserved.
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