Electron transmission through organized organic thin films studied by discrete initial electron kinetic energies

Haran, A.; Naaman, Ron; Ashkenasy, Gonen; Shanzer, A.; Quast, Tatjana; Winter, Bernd; Hertel, I. V.

doi:10.1007/s100510050711

Cited by 10 publications

(8 citation statements)

References 1 publication

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“…For clarity the spectra are vertically displaced. Since the overall spectral features in the figure are fully consistent with literature reports on comparable alkanethiol systems, 18,19 the same peak assignment is being used here. Accordingly, features labeled 8, near 13.5 eV binding energy, and 9, at about 20 eV binding energy (BE), are mainly attributed to the C2s valence emission from the alkane part of the molecules.…”

Section: Spectral Assignment Of Azobenzene-cf 3 /Ch 3 -Terminated Alk...supporting

confidence: 62%

Photoemission from Azobenzene Alkanethiol Self-Assembled Monolayers

Weber¹,

Winter²,

Hertel³

et al. 2003

J. Phys. Chem. B

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Photoelectron spectra were measured for films of self-assembled azobenzene-terminated alkanethiol monolayers on gold using synchrotron radiation. The azobenzene was substituted either by CF 3 or CH 3 in the para position. As a result of the orientational order of the molecules within the films, as indicated by the pronounced angle dependence of the photoemission spectra, it is possible to identify laser-induced optical switching of the molecules using combined laser and synchrotron pulses. Molecular switching, i.e., photoisomerization, is recognized by relative intensity changes of the photoemission peaks and also by spectral shifts to higher binding energies. The latter result from a change of the molecular dipole moment associated with the transcis laser-induced photoisomerization of the azobenzene-CF 3 group.

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Section: Spectral Assignment Of Azobenzene-cf 3 /Ch 3 -Terminated Alk...supporting

confidence: 62%

Photoemission from Azobenzene Alkanethiol Self-Assembled Monolayers

Weber¹,

Winter²,

Hertel³

et al. 2003

J. Phys. Chem. B

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“…Density functional calculations of individual (standing-up) alkanethiols in contact with a gold substrate derive HOMO orbitals of the alkyl chain at about 3 eV binding energy [22,25]. However, conventional (UPS) photoemission data on alkanethiol SAMs do not yield evidence for any adsorbate induced state in this energy regime [26,27]. Interestingly, a very similar spectral signature at 3 eV binding energy was also reported recently in a 2PPE study on tetra-tert-butyl-azobenzene (TBA) on Au (111) [28].…”

Section: Resultsmentioning

confidence: 97%

Two-photon photoemission from ex-situ prepared butanethiol SAMs on Au (111)

et al. 2011

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“…The electronic properties of the films were investigated by low-energy photoelectron spectroscopy (LEPS) in which the energy of photoelectrons ejected from the metal substrate was measured, after they were transmitted through the thin organic film. In previous studies, it had been proposed that the transmission of low-energy electrons through organized organic layers was governed by the film electronic band structure. − …”

Section: Introductionmentioning

confidence: 99%

“…In previous studies, it had been proposed that the transmission of low-energy electrons through organized organic layers was governed by the film electronic band structure. [24][25][26][27] The first goal of our study is to identify what cooperative effects are influencing the electronic properties of the hybrid organic/inorganic structures, namely, how the electronic properties depend on the way the QPs are assembled as an organized structure and what the role of the organic matrix is. The second is to establish the role of the electronic interaction between the film and the substrate.…”

Section: Introductionmentioning

confidence: 99%

Electronic Properties of Hybrid Organic/Inorganic Langmuir−Blodgett Films Containing CdS Quantum Particles

et al. 2002

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We investigated the electronic properties of hybrid inorganic/organic thin films where the inorganic components are monodisperse CdS quantum size particles (diameters 2.5 and 5 nm). For this purpose, low-energy photoelectron spectroscopy was applied in which the energy of photoelectrons, ejected from the metal substrate or from the films themselves, is measured. The electronic properties of hybrid Langmuir-Blodgett films were studied, when the films were deposited on gold or silicon surfaces and contained particles of different sizes arranged in layers at different distances from the substrate. For comparison films containing only the organic matrix were examined, so the effect of the quantum particles (QPs) on the electronic properties of the whole film could be resolved. The present study proves the importance of the organization of hybrid structure on its electronic properties. It is clearly demonstrated that the QPs cannot be considered as insolated species and that their electronic properties are affected by the structure of the film as a whole and by the substrate. It is shown that the QP size affects both the photoelectron emission yield and the scattering efficiency of electrons from the QPs.

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Electron transmission through organized organic thin films studied by discrete initial electron kinetic energies

Cited by 10 publications

References 1 publication

Photoemission from Azobenzene Alkanethiol Self-Assembled Monolayers

Photoemission from Azobenzene Alkanethiol Self-Assembled Monolayers

Two-photon photoemission from ex-situ prepared butanethiol SAMs on Au (111)

Electronic Properties of Hybrid Organic/Inorganic Langmuir−Blodgett Films Containing CdS Quantum Particles

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