Scanning tunneling microscope contrast of perylene-3,4,9,10-tetracarboxylic-dianhydride on graphite and its application to the study of epitaxy

Hoshino, Akitaka; Isoda, Seiji; Kurata, Hiroki; Kobayashi, Takashi

doi:10.1063/1.357361

Cited by 176 publications

(142 citation statements)

References 30 publications

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“…A corresponding LEED pattern is shown in Fig. 3(a) and turns out to be of point-on-line type 30,31 with respect to the uppermost Au layer. Note that-compared to the bulk layersthis uppermost Au layer itself is uniaxially compressed along the [110] direction.…”

Section: Low-temperature Phasementioning

confidence: 99%

“…For weakly interacting systems like PTCDA on Au(111) (Ref. 32) and highly oriented pyrolytic graphite 31 (HOPG) or TiOPc on Au(111), 18 point-on-line structures are frequently observed. This is also the case for the system under study, CuPc on Au(111), where the superstructures are slightly changing, which results in a marginal decrease of area per molecule as a function of coverage.…”

Section: Relaxed Phase and Compressed Monolayer Structuresmentioning

confidence: 99%

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Submonolayer growth of CuPc on noble metal surfaces

et al. 2011

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The understanding of growth mechanisms and electronic properties is a key issue for improving the performance of small organic devices, in which the metal-organic interface and its properties play a crucial role. In this context we investigated the adsorption behavior and the electronic properties of copper-II-phthalocyanine (CuPc) within the first adsorbate layer on Au(111) and Cu(111). Together with recent results published for CuPc/Ag(111) [Kröger et al., New J. Phys. 12, 083038 (2010)] this leads to a comprehensive understanding of the adsorption of CuPc on noble metal surfaces: On Cu(111) the molecule-surface interaction is the strongest. The molecules chemisorb on the surface and form one-dimensional chains or two-dimensional islands, depending on coverage. This behavior indicates an attractive intermolecular interaction. In contrast, on Au(111) CuPc is only weakly physisorbed and behaves like a two-dimensional gas in a wide coverage regime. Only when densely packed do the molecules form ordered structures, which are scarcely influenced by the structure of the metallic surface. Molecule-molecule interaction is also very weak, but in contrast to CuPc on Ag(111) no clear indications for a repulsive interaction are found. Regarding the adsorption strength, this latter system represents an (possibly unique) intermediate case which enables the unusual intermolecular repulsion found recently. Our results highlight the special role of this model system, since the interaction of CuPc with the metal can be "tuned" in any order of the adsorption scenarios observed by selecting the right substrate material.

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Section: Low-temperature Phasementioning

confidence: 99%

Section: Relaxed Phase and Compressed Monolayer Structuresmentioning

confidence: 99%

Submonolayer growth of CuPc on noble metal surfaces

et al. 2011

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“…31,32) These two coincidence models are equivalent in principle, but different presentation in the real space or the reciprocal one. Hoshino et al [28][29][30] examined the firstly growing epitaxial monolayer with respect to a substrate surface by scanning tunneling microscopy and concluded that a depositing lattice is deformed slightly from the stable bulk one so as for the growing lattice to match its spacing to a surface spacing and to gain a stabilization energy through the lattice-lattice interaction. The distortion could be minimized, when a lattice of a bulk crystal (non-deformed) is similar in spacing with that of the substrate.…”

Section: Resultsmentioning

confidence: 99%

“…The misfit value is known to be a dominant factor in epitaxy by point-on-line coincidence. [28][29][30] and by the equivalent coincidence in reciprocal lattice point. 31,32) These two coincidence models are equivalent in principle, but different presentation in the real space or the reciprocal one.…”

Section: Resultsmentioning

confidence: 99%

Interface Structure of Gold Particles on TiO<SUB>2</SUB> Anatase

et al. 2011

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Gold particles supported on titanium dioxide (TiO 2 ) are known to activate many catalytic reactions. In this study, interface structure of gold on anatase was examined in the case on an anatase {101} surface, since the surface is the most important for several photocatalytic reactions. Anatase TiO 2 nanorods having clear washboard-like {101} outer surfaces were synthesized by using a double surfactants system. From high resolution electron microscopy observation for gold particle on the {101} surface, the (113) plane of gold was found to be parallel to the (101)

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“…In particular, the planar stacking of PTCDA molecules has attracted attention of various research groups [397][398][399][400][401][402][403][404].…”

Section: Os Epitaxymentioning

confidence: 99%

Organic semiconductors for device applications: current trends and future prospects

Ahmad

2014

Journal of Polymer Engineering

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Abstract:With the rich experience of developing silicon devices over a period of the last six decades, it is easy to assess the suitability of a new material for device applications by examining charge carrier injection, transport, and extraction across a practically realizable architecture; surface passivation; and packaging and reliability issues besides the feasibility of preparing mechanically robust wafer/substrate of single-crystal or polycrystalline/ amorphous thin films. For material preparation, parameters such as purification of constituent materials, crystal growth, and thin-film deposition with minimum defects/ disorders are equally important. Further, it is relevant to know whether conventional semiconductor processes, already known, would be useable directly or would require completely new technologies. Having found a likely candidate after such a screening, it would be necessary to identify a specific area of application against an existing list of materials available with special reference to cost reduction considerations in large-scale production. Various families of organic semiconductors are reviewed here, especially with the objective of using them in niche areas of large-area electronic displays, flexible organic electronics, and organic photovoltaic solar cells. While doing so, it appears feasible to improve mobility and stability by adjusting π-conjugation and modifying the energy bandgap. Higher conductivity nanocomposites, formed by blending with chemically conjugated C-allotropes and metal nanoparticles, open exciting methods of designing flexible contact/interconnects for organic and flexible electronics as can be seen from the discussion included here.

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Scanning tunneling microscope contrast of perylene-3,4,9,10-tetracarboxylic-dianhydride on graphite and its application to the study of epitaxy

Cited by 176 publications

References 30 publications

Submonolayer growth of CuPc on noble metal surfaces

Submonolayer growth of CuPc on noble metal surfaces

Interface Structure of Gold Particles on TiO<SUB>2</SUB> Anatase

Organic semiconductors for device applications: current trends and future prospects

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