Electronic structure at organic/metal interfaces: Naphthalene/Cu (111)

Article Abstract:

Two-photon photoemission (2PPE) spectroscopy to study heterogeneous electron transport in a model system, naphthalene adsorbed on Cu (111), is used. The dependence of 2PPE spectra on photon energy for the occurrence of photoinduced electron transfer to an unoccupied state at3.1 eV above the Fermi level (or 1.1 eV below the vacuum level) on one monolayer coverage is established.

Naphthalene, Petrochemical Manufacturing, Copper, Electron configuration

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Electron transport across the alkanethiol self-assembled monolayer/Au(111) interface: Role of the chemical anchor

Article Abstract:

A study to examine the role of the chemisorption bond on electron dynamics at the self-assembled monolayer/Au interface using time resolved two-photon photoemission is conducted. The formation of the Au-S bond is evidenced by a localized sigma* resonance that broadens and shifts upward in energy when the lying-down chemisorbed molecules stand up.

All Other Basic Organic Chemical Manufacturing, Industrial Organic Chemicals, Mercaptans, Design and construction, Monomolecular films, Alkanes, Thiols, Atomic properties

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Distance-dependent electronic coupling at molecule-metal interfaces: C60/Cu(111)

Article Abstract:

The femtosecond two-photon photoemission (2PPE) spectroscopy is used to measure the molecular dynamics of the transiently populated lowest unoccupied molecular orbital (LUMO+1) and LUMO+2 levels in epitaxial films of C60 on Cu(111). The rates of quenching depend exponentially on film thickness for LUMO+1 and LUMO+2 levels.

Measurement, Photoemission, Photons, Molecular dynamics

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