1995
DOI: 10.1002/pssb.2221920213
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Highly‐Ordered Organic Adsorbates: Commensurate Superstructures, OMBE, and 1D Nanostructures

Abstract: Big organic molecules deposited by vacuum sublimation on reactive surfaces form highly-ordered superstructures which are often commensurate to the substrate if covalent, nondissociative bonding occurs. The orientation of the molecules at the interface can be varied depending on reactive groups, substrate surface, and coadsorbates. Deposition of highly-ordered thin films, or even organic molecular beam epitaxy (OMBE), is difficult but appears possible under certain conditions. Organic nanostructures can be prod… Show more

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Cited by 76 publications
(29 citation statements)
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“…2 displays three distinct molecular features: the first one-labeled hybridization state-appears very close to the Fermi level at an average binding energy of about 0.4 eV. In analogy to PTCDA/Ag(1 1 1) [21,22,26], it results most likely from the population of the p * -like lowest unoccupied molecular orbital by transferred electrons from the Ag 4s states, maybe including the electrons from the Shockley states [24]. Although this state is partially filled, we call it briefly LUMO or former LUMO in the following.…”
Section: Resultsmentioning
confidence: 95%
See 1 more Smart Citation
“…2 displays three distinct molecular features: the first one-labeled hybridization state-appears very close to the Fermi level at an average binding energy of about 0.4 eV. In analogy to PTCDA/Ag(1 1 1) [21,22,26], it results most likely from the population of the p * -like lowest unoccupied molecular orbital by transferred electrons from the Ag 4s states, maybe including the electrons from the Shockley states [24]. Although this state is partially filled, we call it briefly LUMO or former LUMO in the following.…”
Section: Resultsmentioning
confidence: 95%
“…In comparison to the spectra of the clean Ag(1 1 1) surface, the spectrum shows several new features originating from the molecular orbitals of the adsorbed NTCDA molecules. In particular, the sharp Shockley state of the Ag(1 1 1) surface with a maximum binding energy of 63 meV at the band minimum [20] is completely quenched due to the strong coupling with the orbitals of the molecule, which is usually described in terms of a chemisorption process as in the case of PTCDA/ Ag(1 1 1) [21,22]. One possible explanation is a participation of the Shockley state electrons in the filling of the molecular orbitals.…”
Section: Resultsmentioning
confidence: 97%
“…Since this has been discussed in previous publications by others [26,[41][42][43] and by us [4,7,8,[44][45][46] we will only briefly address this point here because it is important in context with the electronic data. Fig.…”
Section: Structural Datamentioning
confidence: 95%
“…In particular it was clear from previous studies that PTCDA molecules chemisorb on different Ag surfaces [8][9][10][11][12][13][14][15] and form highly ordered monolayers, i.e. different commensurate superstructures depending on surface orientation [14,[16][17][18][19].…”
Section: Introductionmentioning
confidence: 99%