Molecular orbital shifts of π-bonded ethylene adsorbed on Pt(111) in the presence of potassium atoms
1991; Elsevier BV; Volume: 251-252; Linguagem: Inglês
10.1016/0039-6028(91)91164-s
ISSN1879-2758
AutoresA. Cassuto, Mane Mane, V. Kronneberg, Jacques Jupille,
Tópico(s)Molecular Junctions and Nanostructures
ResumoOn increasing K coverages, the valence levels of π-bonded ethylene formed on K precovered Pt(111) surfaces are seen to shift continuously towards higher binding energies up to θK = 0.14 and to level off beyond that coverage. This behaviour is explained using simple electrostatic considerations. At low coverage, the compression of the molecules is suggested to move the π-bonded molecules towards the K atoms (i.e. towards higher local electrostatic potential). Above θk = 0.14, the predominant effect comes from the influence of several K adatoms.
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