Performance of the grating-crystal monochromator of the ALOISA beamline at the Elettra Synchrotron

Floreano, Luca; Naletto, G.; Cvetko, D.; Gotter, R.; Malvezzi, A. M.; Marassi, L; Morgante, A.; Santaniello, A.; Verdini, Alberto; Tommasini, F.; Tondello, G.

doi:10.1063/1.1150001

Cited by 180 publications

(123 citation statements)

References 41 publications

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“…XPS measurement of the N-1s and C-1s core-levels were performed at the Aloisa beamline of the Elettra synchrotron radiation facility in Trieste. 22 Experiments have been done in an UHV chamber with base pressure better than 1×10 −10 mbar using a photon energy of 500 eV, with high energy-resolution of 180 meV. The binding energy scale was calibrated with respect to the Au-4f 7/2 core level at the clean substrate.…”

Section: Methodsmentioning

confidence: 99%

Metal-phthalocyanine ordered layers on Au(110): Metal-dependent adsorption energy

Massimi

Angelucci

Gargiani

et al. 2014

The Journal of Chemical Physics

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Iron-phthalocyanine and cobalt-phthalocyanine chains, assembled along the Au(110)-(1×2) reconstructed channels, present a strong interaction with the Au metallic states, via the central metal ion. X-ray photoemission spectroscopy from the metal-2p core-levels and valence band high-resolution ultraviolet photoelectron spectroscopy bring to light signatures of the interaction of the metal-phthalocyanine single-layer with gold. The charge transfer from Au to the molecule causes the emerging of a metal-2p core level component at lower binding energy with respect to that measured in the molecular thin films, while the core-levels associated to the organic macrocycle (C and N 1s) are less influenced by the adsorption, and the macrocycles stabilize the interaction, inducing a strong interface dipole. Temperature Programmed Desorption experiments and photoemission as a function of temperature allow to estimate the adsorption energy for the thin-films, mainly due to the molecule-molecule van der Waals interaction, while the FePc and CoPc single-layers remain adsorbed on the Au surface up to at least 820 K. © 2014 AIP Publishing LLC

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Section: Methodsmentioning

confidence: 99%

Metal-phthalocyanine ordered layers on Au(110): Metal-dependent adsorption energy

Massimi

Angelucci

Gargiani

et al. 2014

The Journal of Chemical Physics

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“…The LEED and STM experiments were carried out at Bariloche using an ultra-high vacuum system from Omicron-Nanotechnology. The HR-XPS experiments were carried out at the ALOISA beam line 25,26 of the ELETTRA synchrotron, at Trieste.…”

Section: Methodsmentioning

confidence: 99%

Interplay between Hydrogen Bonding and Molecule–Substrate Interactions in the Case of Terephthalic Acid Molecules on Cu(001) Surfaces

et al. 2013

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The adsorption and self-assembling properties of terephthalic acid (TPA) molecules deposited on Cu(001) at room temperature have been systematically studied with both experimental and theoretical tools. The system forms two phases at room temperature: the metastable β-phase and the stable (3 × 3) one. In the case of the β phase, low-energy electron diffraction and scanning tunneling microscopy (STM) results indicate that it has a (9√2 × 2√2) R45° unit cell with exactly the same molecular coverage as the (3 × 3) phase. In addition, the high-resolution X-ray photoelectron-spectroscopy spectra of the O 1s core level indicate that the irreversible β → (3 × 3) transition involves the following two processes: (i) deprotonation of the complete carboxyl groups remaining in the metastable phase and (ii) eventual rearrangement of the molecules into the 3 × 3 configuration. We explored possible molecular configurations for the β phase with different degree of deprotonation (including structures with Cu adatoms) by means of density functional theory calculations. Our theoretical results indicate the formation of strong bonds between the O atoms in carboxylates and the Cu atoms of the surface, which causes a bending of the molecules and a buckling of the first Cu layer. In the (3 × 3) phases, we show that the bending produces observable effects in the molecular STM images. Moreover, the strong interaction between the carboxylates and the Cu atoms at the step edges drives the reorientation of the surface steps along the ⟨100⟩ crystallographic directions.

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“…The metal samples were cleaned with cycles of sputtering (Ar + pressure of 1×10 -6 mbar) and annealing (800 K), and the molecules were deposited on the clean samples kept at room temperature. NEXAFS and XPS have been recorded at the D1011 beamline at MAX-Lab (Lund, Sweden) and at ALOISA beamline 9 at Elettra (Trieste, Italy). They provide precise chemical information of the surface reactions, and are highly useful to understand the mechanisms of (cyclo)dehydrogenation in an atomistic way.…”

Section: Methodsmentioning

confidence: 99%

Spectroscopic characterization of the on-surface induced (cyclo)dehydrogenation of a N-heteroaromatic compound on noble metal surfaces

Palacio

Pinardi

Martínez

et al. 2017

Phys. Chem. Chem. Phys.

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New nanoarchitectures can be built from polycyclic aromatic hydrocarbons (PAHs) by exploiting the capability of some metal surfaces of inducing cyclodehydrogenation reactions. This bottom-up approach allows the formation of nanostructures with different dimensionality from the same precursor as a consequence of the diffusion and coupling of the PAHs adsorbed on the surface. In this work we present a thorough study, by means of a combination of X-ray Photoemission Spectroscopy, Near-Edge X-ray Absorption Fine Structure and Scanning Tunneling Microscopy with first principle calculations, of the structural and chemical transformations undergone by pyridyl-substituted dibenzo[5]helicene on three coinage surfaces, namely Cu(110), Cu(111) and Au(111). Upon annealing, on-surface chemical reactions are promoted affecting the adsorbate/substrate and the molecule/molecule interactions. This thermally induced process favours the transformation from diffusing isolated molecules to polymeric nanographene chains and finally to N-doped graphene. IntroductionNew organic materials have the potential of substituting silicon-based technology in electronic devices, and are already widely spread in organic light emitting diodes (OLED) and in new designs of solar cells. Surface-mediated chemical modification of polycyclic aromatic hydrocarbons (PAHs), emerges as an excellent way to synthesize novel nanostructures, with a precise control of their composition and of their electronic properties. Moreover, this bottom-up approach may allow controlling a specific reaction path at the atomic level, leading to tailored reaction outcomes. In particular, thermally induced (cyclo)dehydrogenation (and/or dehalogenation) of PAHs followed by covalent coupling on transition metal surfaces may result in the synthesis of new zero-, one-and two-dimensional nanoarchitectures.

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Performance of the grating-crystal monochromator of the ALOISA beamline at the Elettra Synchrotron

Cited by 180 publications

References 41 publications

Metal-phthalocyanine ordered layers on Au(110): Metal-dependent adsorption energy

Metal-phthalocyanine ordered layers on Au(110): Metal-dependent adsorption energy

Interplay between Hydrogen Bonding and Molecule–Substrate Interactions in the Case of Terephthalic Acid Molecules on Cu(001) Surfaces

Spectroscopic characterization of the on-surface induced (cyclo)dehydrogenation of a N-heteroaromatic compound on noble metal surfaces

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