Modulation of Surface Charge Transfer through Competing Long-Range Repulsive versus Short-Range Attractive Interactions

Fraxedas, Jordi; García-Gil, Sandra; Monturet, Serge; Lorente, Nicolás; Fernández-Torrente, I.; Franke, Katharina J.; Pascual, José; Vollmer, Antje; Blum, Ralph-Peter; Koch, Norbert; Ordejón, Pablo

doi:10.1021/jp2050838

Cited by 51 publications

(79 citation statements)

References 58 publications

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“…An interaction driven by a charge transfer from/to the substrate can be the origin of the repulsion between the chains, as already reported for other one dimensional molecular systems. 25,[48][49][50] A surface state mediated interaction, observed for different adatoms on Cu(111) 51,52 or for pentacene molecules on Cu(110), 53 seems not to be pertinent here, since we find a coverage-dependent average distance between the chains.…”

Section: Resultsmentioning

confidence: 68%

Temperature-dependent self-assembly of NC–Ph5–CN molecules on Cu(111)

Pivetta

Pacchioni

Fernandes

et al. 2015

The Journal of Chemical Physics

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We present the results of temperature-dependent self-assembly of dicarbonitrile-pentaphenyl molecules (NC-Ph 5 -CN) on Cu(111). Our low-temperature scanning tunneling microscopy study reveals the formation of metal-organic and purely organic structures, depending on the substrate temperature during deposition (160-300 K), which determines the availability of Cu adatoms at the surface. We use tip functionalization with CO to obtain submolecular resolution and image the coordination atoms, enabling unequivocal identification of metal-coordinated nodes and purely organic ones. Moreover, we discuss the somewhat surprising structure obtained for deposition and measurement at 300 K. C 2015 AIP Publishing LLC. [http://dx

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Section: Resultsmentioning

confidence: 68%

Temperature-dependent self-assembly of NC–Ph5–CN molecules on Cu(111)

Pivetta

Pacchioni

Fernandes

et al. 2015

The Journal of Chemical Physics

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“…These systems show a variety of different phases, the properties of which can be tuned by the proper choice of molecules, substrates, preparation conditions, temperature, etc. It has also been realized that -in particular -the interaction between the first molecular layer and the surface is dominant for the properties of the organic films [7][8][9][10][11][12]. It determines the molecular orientation and ordering in the first layer and subsequently also the growth behavior of the entire thin film adsorbed subsequently.…”

Section: Introductionmentioning

confidence: 99%

Heteromolecular metal–organic interfaces: Electronic and structural fingerprints of chemical bonding

Stadtmüller

Schröder

Kumpf

2015

Journal of Electron Spectroscopy and Related Phenomena

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“…A comprehensive understanding of the physical properties of metal-organic interfaces was achieved by studying the adsorption of the organic interface layer of prototype molecules, such as 3,4,9,10-perylenetetra-carboxylic-dianhydride (PTCDA) [1][2][3][4][5][6], metal phthalocyanines (MePc) [7][8][9][10][11][12][13][14][15][16], and other π -conjugated molecules [17][18][19][20] on highly crystalline (noble) metal surfaces. In many investigations it was found that the geometric structure and the electronic level alignment at these metal-organic interfaces are determined by the interactions between the molecules themselves, as well as between the molecules and the metal surface.…”

Section: Introductionmentioning

confidence: 99%

Modification of the PTCDA-Ag bond by forming a heteromolecular bilayer film

et al. 2015

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The understanding of the fundamental physical properties of metal-organic and organic-organic interfaces is crucial for improving the performance of organic electronic devices. This is particularly true for (multilayer) systems containing several molecular species due to their relevance for donor-acceptor systems. A prototypical heteromolecular bilayer system is copper-II-phthalocyanine (CuPc) on 3,4,9,10-perylene-tetra-carboxylicdianhydride (PTCDA) on Ag(111). In an earlier work we have reported a commensurate registry between both organic layers and an enhanced charge transfer from the Ag substrate into the organic bilayer film [Phys. Rev. Lett. 108, 106103 (2012)], which both indicate an unexpectedly strong intermolecular interaction across the organic-organic interface. Here we present new details regarding electronic and geometric structure for the same system. In particular, we provide evidence that the enhanced charge transfer from the substrate into the organic bilayer does not involve CuPc electronic states, hence, there is no significant charge transfer into the second organic layer. Furthermore, we report vertical bonding distances revealing a shortening of the PTCDA-Ag(111) distance upon CuPc adsorption. Thus, electronic and geometric properties (charge transfer and bonding distance, respectively) both indicate a strengthening of the PTCDA-Ag(111) bond upon CuPc adsorption. We explain these findings-in particular the correlation between CuPc adsorption and increased charge transfer into PTCDA-in a model involving an intermolecular screening mechanism.

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Modulation of Surface Charge Transfer through Competing Long-Range Repulsive versus Short-Range Attractive Interactions

Cited by 51 publications

References 58 publications

Temperature-dependent self-assembly of NC–Ph5–CN molecules on Cu(111)

Temperature-dependent self-assembly of NC–Ph5–CN molecules on Cu(111)

Heteromolecular metal–organic interfaces: Electronic and structural fingerprints of chemical bonding

Modification of the PTCDA-Ag bond by forming a heteromolecular bilayer film

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