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Wyszukujesz frazę "Scheer, E." wg kryterium: Autor

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    Wyświetlanie 1-4 z 4
    Tytuł:
    Pulsed Laser Interference Patterning of Metallic Thin Films
    Autorzy:
    Riedel, S.
    Leiderer, P.
    Scheer, E.
    Boneberg, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1490050.pdf
    Data publikacji:
    2012-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    68.55.-a
    68.08.Bc
    81.16.-c
    Opis:
    Pulsed laser interference is applied to metallic and semiconductor thin films in the thickness range of 40-100 nm. At intensities which induce local melting we observe local retraction of the molten material towards the unmolten areas due to dewetting. Thus micropatterning of surface gets feasible. Although this dewetting induced retraction should be a common behaviour of metals on oxide surfaces, two groups of materials can be distinguished. In the first group the former molten areas get completely blank of metal while in the second group a material droplet remains in the center of the molten area. We show that this behaviour can be attributed to a distinctly different way of liquid movement upon local melting.
    Źródło:
    Acta Physica Polonica A; 2012, 121, 2; 385-387
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Electron Transport in Magnetic Quantum Point Contacts
    Autorzy:
    Pietsch, T.
    Egle, S.
    Espy, C.
    Strigl, F.
    Scheer, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/1490057.pdf
    Data publikacji:
    2012-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    73.23.-b
    72.25.-b
    73.63.-b
    Opis:
    In recent years, the fabrication of novel building blocks for quantum computation- and spintronics devices gained significant attention. The ultimate goal in terms of miniaturization is the creation of single-atom functional elements. Practically, quantum point contacts are frequently used as model systems to study the fundamental electronic transport properties of such mesoscopic systems. A quantum point contact is characterised by a narrow constriction coupling two larger electron reservoirs. In the absence of a magnetic field, the conductance of these quantum point contacts is quantised in multiples of $2 e^2//h$, the so-called conductance quantum $(G_0)$. However, in the presence of magnetic fields the increased spin-degeneracy often gives rise to a deviation from the idealized behaviour and therefore leads to a change in the characteristic conductance of the quantum point contact. Herein, we illustrate the complex magnetotransport characteristics in quantum point contacts and magnetic heterojunctions. The theoretical framework and experimental concepts are discussed briefly together with the experimental results as well as potential applications.
    Źródło:
    Acta Physica Polonica A; 2012, 121, 2; 401-409
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Statistical Investigation of Current-Voltage Characterization in Single Molecule-Metal Junctions
    Autorzy:
    Kirchner, T.
    Briechle, B.
    Scheer, E.
    Wolf, J.
    Huhn, T.
    Erbe, A
    Powiązania:
    https://bibliotekanauki.pl/articles/1490078.pdf
    Data publikacji:
    2012-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    73.23.-b
    73.63.Rt
    81.07.Nb
    Opis:
    We show statistical measurements of single molecule-metal contacts using the mechanically controllable break junction technique. The measurements are carried out in a solvent, in order to allow in situ binding of the molecules to the metallic contacts during the measurements. Statistics is gathered by opening and closing the junctions repeatedly and recording current-voltage characteristics at various stages of the opening and closing curves. By modeling the data with a single level model we can extract parameters such as the position of the molecular energy level, which carries the current, and the coupling between the metal and the molecule. In first experiments we use this method to characterize different anchoring groups, which mediate the mechanical and electrical coupling between the metallic electrodes and the molecules. We use tolane molecules, which are structurally simple, as model systems for this purpose.
    Źródło:
    Acta Physica Polonica A; 2012, 121, 2; 410-415
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Plasmon Enhancement of Fluorescence in Single Light-Harvesting Complexes from em Amphidinium carterae
    Autorzy:
    Bujak, Ł.
    Piątkowski, D.
    Mackowski, S.
    Wörmke, S.
    Jung, C.
    Bräuchle, C.
    Agarwal, A.
    Kotov, N.
    Schulte, T.
    Hofmann, E.
    Brotosudarmo, T.
    Scheer, H.
    Govorov, A.
    Hiller, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1807594.pdf
    Data publikacji:
    2009-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    87.80.Nj
    87.14.E-
    87.64.M-
    Opis:
    We show that single peridinin-chlorophyll a-protein light-harvesting complexes from dinoflagellate Amphidinium carterae placed near to silver nanoparticles show strongly enhanced fluorescence emission. Single molecule spectroscopy experiments performed at room temperature point toward an enhancement of more than an order of magnitude for optimal conditions. Irrespective of the enhancement, we observe no effect of the metal nanoparticle on the fluorescence emission energy of the complex. This result provides a way to control the optical properties of biomolecules via plasmon excitations in metal nanoparticles.
    Źródło:
    Acta Physica Polonica A; 2009, 116, S; S-22-S-25
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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