Molecular Organic Films

Sokołowski, M.

doi:10.1002/9783527680566.ch26

Cited by 2 publications

(2 citation statements)

References 117 publications

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“…From that point of view, it may seem surprising that a very similar density of molecular electronic states, as that observed for 1 ML C 60 either adsorbed on the clean Fe or on the Cr 4 O 5 /Fe surfaces, may correspond to very different morphologies of the molecular layer. On the other hand, it must be underlined that, in principle, the strength by which the molecule is bound to the surface (binding energy, E B ) is not related to the diffusion barrier E D that molecules need to overcome in order to move between adjacent adsorption sites, which gives rise to the so-called corrugation potential . Measuring both quantities would require specific experiments and is beyond the scope of the present paper.…”

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confidence: 95%

Enhanced Magnetic Hybridization of a Spinterface through Insertion of a Two-Dimensional Magnetic Oxide Layer

et al. 2017

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Interfaces between organic semiconductors and ferromagnetic metals offer intriguing opportunities in the rapidly developing field of organic spintronics. Understanding and controlling the spin-polarized electronic states at the interface is the key toward a reliable exploitation of this kind of systems. Here we propose an approach consisting in the insertion of a two-dimensional magnetic oxide layer at the interface with the aim of both increasing the reproducibility of the interface preparation and offering a way for a further fine control over the electronic and magnetic properties. We have inserted a two-dimensional CrO layer at the C/Fe(001) interface and have characterized the corresponding morphological, electronic, and magnetic properties. Scanning tunneling microscopy and electron diffraction show that the film grows well-ordered both in the monolayer and multilayer regimes. Electron spectroscopies confirm that hybridization of the electronic states occurs at the interface. Finally, magnetic dichroism in X-ray absorption shows an unprecedented spin-polarization of the hybridized fullerene states. The latter result is discussed also in light of an ab initio theoretical analysis.

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confidence: 95%

Enhanced Magnetic Hybridization of a Spinterface through Insertion of a Two-Dimensional Magnetic Oxide Layer

et al. 2017

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“…The deposition of 1,4‴-dimethoxy-4,1′:4′,1″:4″,1‴-quaterphenylene (MOP4) by organic molecular beam deposition (OMBD) was accomplished in an apparatus with a base pressure of 1 × 10 –8 mbar . Air-cleaved muscovite mica (grade V-4, Structure Probe, Inc.) was loaded into the vacuum chamber, and MOP4 was deposited with a rate between 0.2 and 0.4 Å/s.…”

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confidence: 99%

Thin Film Phase and Local Chirality of Surface-Bound MOP4 Nanofibers

et al. 2016

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Vacuum deposition of the methoxy functionalized para-quaterphenylene MOP4 on muscovite mica at elevated temperatures leads to the formation of several ten micrometer long nanofibers. As shown by X-ray diffraction and by polarized optical microscopy, the fibers are formed by lying molecules, which grow epitaxially (point-on-line coincidence) along two directions on a single muscovite domain. The crystal structure of the fibers is induced by the substrate. Molecular packing is calculated by molecular dynamics simulations. A wetting layer from lying molecules is observed by low energy electron diffraction (LEED), with a different crystal structure from that of the fibers.Transfer of the sample from vacuum to ambient conditions leads to dewetting and to the formation of clusters from lying molecules. Samples age via Ostwald ripening due to the presence of water vapor, monitored by atomic force microscopy (AFM). Fibers represent chiral organization into single-handed aggregates of both handednesses, which is not affected by aging. On a global level the sample remains achiral.

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Molecular Organic Films

Cited by 2 publications

References 117 publications

Enhanced Magnetic Hybridization of a Spinterface through Insertion of a Two-Dimensional Magnetic Oxide Layer

Enhanced Magnetic Hybridization of a Spinterface through Insertion of a Two-Dimensional Magnetic Oxide Layer

Thin Film Phase and Local Chirality of Surface-Bound MOP4 Nanofibers

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