Molecule–metal interaction of pentacene on copper vicinal surfaces

Baldacchini, Chiara; Allegretti, Francesco; Gunnella, R.; Betti, Maria Grazia

doi:10.1016/j.susc.2006.12.016

Cited by 36 publications

(52 citation statements)

References 25 publications

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“…As a consequence, the C atoms participating most strongly in the hybridization (those numbered 2 and 4 in the inset of Fig. 2b) exhibit a chemical shift to lower binding energies in the XPS spectra, which disappears for multilayer films [21]. A detailed peak shape analysis of the 1 and 2 ML coverage data in Fig.…”

Section: Resultsmentioning

confidence: 94%

Effect of fluorination on the molecule–substrate interactions of pentacene/Cu(100) interfaces

Oteyza

Wakayama

Liu³

et al. 2010

Chemical Physics Letters

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a b s t r a c tBy means of scanning tunneling microscopy (STM), X-ray photoelectron spectroscopy (XPS) and nearedge X-ray absorption fine structure (NEXAFS), we study and compare the crystalline and electronic structure of fluorinated and non-fluorinated pentacene fims on Cu(1 0 0). Pentacene perfluorination strongly affects its electronic structure both in the bulk and at the metal-organic interface. While the azimuthal anisotropy of the molecule-substrate interactions on Cu(1 0 0) remains unaffected by the fluorination, the interaction mechanisms, as concluded from their effect on the core-levels and on the conduction band of the respective molecules, show a completely disparate behaviour.

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Section: Resultsmentioning

confidence: 94%

Effect of fluorination on the molecule–substrate interactions of pentacene/Cu(100) interfaces

Oteyza

Wakayama

Liu³

et al. 2010

Chemical Physics Letters

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“…Upon further biphenylene depositions, the peak becomes symmetric and shifts to higher BE, being centered at 284.9 eV for intermediate coverage (Figure 2 The monolayer and low coverage C 1s photoemission lines show the typical asymmetric shape, also observed for other low coverage films of carbon-based molecules on metallic substrates. [30][31][32] The asymmetry is usually ascribed to the inelastic scattering of the photoelectrons with electron-hole pairs in correspondence of the Cu Fermi level (E F ), i.e., the high density of state at E F allows for shake-up transitions from states just below E F to empty states just above E F . At higher film thicknesses, the increased coverage on the surface and then the quenched molecule-substrate interaction make the inelastic scattering less favorable and the line shape may become more symmetric, as observed in Figure 2.…”

Section: Resultsmentioning

confidence: 99%

Electronic structure investigation of biphenylene films

Totani

Grazioli

Zhang

et al. 2017

The Journal of Chemical Physics

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Photoelectron Spectroscopy (PS) and Near-Edge X-ray Absorption Fine Structure (NEXAFS) spectroscopy have been used to investigate the occupied and empty density of states of biphenylene films of different thicknesses, deposited onto a Cu(111) crystal. The obtained results have been compared to previous gas phase spectra and single molecule Density Functional Theory (DFT) calculations to get insights into the possible modification of the molecular electronic structure in the film induced by the adsorption on a surface. Furthermore, NEXAFS measurements allowed characterizing the variation of the molecular arrangement with the film thickness and helped to clarify the substrate-molecule interaction.

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“…This fit of the C 1s PE spectra is in fair agreement with the theoretical calculations for gas-phase Pn 32 and previous experimental studies of thin Pn films. 35 Since there is no significant chemical interaction between the h-BN substrate and the Pn molecules, the thicknessrelated variation in the C 1s PES can be attributed entirely to the gradual rearrangement of the molecules from the parallel to upright orientation. At low coverage ͓Fig.…”

Section: Resultsmentioning

confidence: 99%

Effect of substrate nanopatterning on the growth and structure of pentacene films

Preobrajenski

Zakharov

et al. 2010

Phys. Rev. B

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The effect of modulating the structure of thin pentacene ͑C 22 H 14 ͒ films by a nanopatterned inert substrate, known as hexagonal boron nitride nanomesh, is reported. Films of different thickness are grown and characterized by x-ray absorption, core-level photoemission, low-energy electron microscopy, microbeam low-energy electron diffraction, and scanning tunneling microscopy. Initially the pentacene molecules adsorb with the molecular plane lying flat on the substrate but they tend to flip up with increasing coverage, forming wellordered monolayer-thick islands of upright molecules with low nucleation density. The herringbone packing of the upright molecules is observed with scanning tunneling microscopy. The electronic structure of the adsorbed molecules is very similar to that of the gas-phase pentacene, implying weak interaction with the substrate and between the molecules. The periodic corrugation of the substrate surface causes the monolayer of upright pentacene molecules to form two different coincidence superstructures. The lattice parameters of the pentacene unit cell for each of these two substrate-induced domains are determined from the microdiffraction patterns. Both domains can occur in several equivalent configurations, thus resulting in a number of twins with a typical size of a few micrometers. The first monolayer grows in a layer-by-layer mode until it is completed while the second monolayer forms diffusion-limited fractal islands. Upon annealing, the pentacene films are thermally stable up to approximately 80°C and thereafter the onset of desorption is observed.

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Molecule–metal interaction of pentacene on copper vicinal surfaces

Cited by 36 publications

References 25 publications

Effect of fluorination on the molecule–substrate interactions of pentacene/Cu(100) interfaces

Effect of fluorination on the molecule–substrate interactions of pentacene/Cu(100) interfaces

Electronic structure investigation of biphenylene films

Effect of substrate nanopatterning on the growth and structure of pentacene films

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