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  • 1
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    Evidence for acoustic-like plasmons on epitaxial graphene on Pt(111) (2011)
    American Physical Society (APS)
    Details
    Publication Date: 2011-07-02
    Description: Author(s): A. Politano, A. R. Marino, V. Formoso, D. Farías, R. Miranda, and G. Chiarello The dispersion and the damping of the sheet plasmon in a graphene monolayer grown on Pt(111) have been studied by using angle-resolved electron energy loss spectroscopy. We found that the dispersion relation of the plasmon mode confined in the graphene sheet is linear, as a consequence of the screen... [Phys. Rev. B 84, 033401] Published Fri Jul 01, 2011
    Keywords: Surface physics, nanoscale physics, low-dimensional systems
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
    Published by American Physical Society (APS)
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  • 2
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    Geodynamic processes in the Andes of Central Chile and Argentina: an introduction (2014)
    Geological Society (of London)
    Details
    Publication Date: 2014-12-17
    Description: The Andes, the world's largest non-collisional orogen, is considered the paradigm for geodynamic processes associated with the subduction of an oceanic plate below a continental plate margin. In the framework of UNESCO-sponsored IGCP 586-Y project, this Special Publication includes state-of-the-art reviews and original articles from a range of Earth Science disciplines that investigate the complex interactions of tectonics and surface processes in the subduction-related orogen of the Andes of central Chile and Argentina ( c. 27–39°S). This introduction provides the geological context of the transition from flat slab to normal subduction angles, where this volume is focused, along with a brief description of the individual contributions ranging from internal geodynamics and tectonics, Quaternary tectonics and related geohazards, to landscape evolution of this particular segment of the Andes.
    Print ISSN: 0305-8719
    Electronic ISSN: 2041-4927
    Topics: Geosciences
    Published by Geological Society (of London)
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  • 3
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    Reactive and nonreactive scattering of H2 from a metal surface is electronically adiabatic (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2006-02-14
    Description: The Born-Oppenheimer approximation of uncoupled electronic and nuclear motion is a standard tool of the computational chemist. However, its validity for molecule-metal surface reactions, which are important to heterogeneous catalysis, has been questioned because of the possibility of electron-hole pair excitations. We have performed experiments and calculations on the scattering of molecular hydrogen from a catalytically relevant metal surface, obtaining absolute probabilities for changes in the molecule's velocity parallel to the representative Pt(111) surface. The comparison for in-plane and out-of-plane scattering and results for dissociative chemisorption in the same system show that for hydrogen-metal systems, reaction and diffractive scattering can be accurately described using the Born-Oppenheimer approximation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nieto, Pablo -- Pijper, Ernst -- Barredo, Daniel -- Laurent, Guillaume -- Olsen, Roar A -- Baerends, Evert-Jan -- Kroes, Geert-Jan -- Farias, Daniel -- New York, N.Y. -- Science. 2006 Apr 7;312(5770):86-9. Epub 2006 Feb 9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Departamento de Fisica de la Materia Condensada C-3 and Instituto Nicolas Cabrera, Universidad Autonoma de Madrid, 28049 Madrid, Spain.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16469880" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 4
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    Multiple acoustic surface plasmons in graphene/Cu(111) contacts (2018)
    American Physical Society (APS)
    Details
    Publication Date: 2018-01-12
    Description: Author(s): A. Politano, H. K. Yu, D. Farías, and G. Chiarello The excitation spectrum of graphene on Cu(111), probed by momentum-resolved electron-energy-loss spectroscopy, exhibits multiple acoustic surface plasmons (ASP), arising from both the graphene overlayer and the Cu(111) substrate. We have investigated the mutual interaction between the ASP of the gra... [Phys. Rev. B 97, 035414] Published Thu Jan 11, 2018
    Keywords: Surface physics, nanoscale physics, low-dimensional systems
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
    Published by American Physical Society (APS)
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  • 5
    Electronic Resource
    Electronic Resource
    Helium scattering structure analyses of the chemisorbed hydrogen phases on Co(101¯0) (2000)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 113 (2000), S. 8283-8289 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The adsorption of hydrogen on the Co(101¯0) surface has been studied by means of helium atom scattering. In agreement with previous results, three ordered adsorbate structures have been identified at 85 K: a c(2×4)4H, a (2×1)p2mg, and a (1×2) saturation phase. The surface structures were determined from a quantitative analysis of the corresponding He-diffraction spectra. The corrugation functions derived from the calculations reveal that in the c(2×4)4H phase the hydrogen atoms from zigzag and zagzig chains along every second close-packed row of the substrate, although the kind of occupied threefold sites cannot be determined from our data. In the (2×1)p2mg phase, hydrogen atoms are found to occupy the hcp-like sites, whereas the substrate's reconstruction in the (1×2) phase is of the pairing-row type. This means that hydrogen forms analogous structures on the Co(101¯0) rather than on the structurally similar Ni(110) surface. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1311974
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  • 6
    Electronic Resource
    Electronic Resource
    Helium scattering cross section of adsorbates on highly corrugated surfaces (2000)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 112 (2000), S. 4797-4800 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The properties of different definitions of the cross section for helium scattering of perfectly diffuse adsorbates on highly corrugated surfaces have been investigated experimentally. For the adsorption of CO on Rh(311) we found that the normalized cross section associated with each diffraction beam scatters strongly with the angle of incidence, the incident energy, and the intensity of the diffraction beam. In particular, our results demonstrate that, contrary to the suggestion of a recent work, no simple relation exist between the intensity of a given diffraction beam and the associated cross section. On the other hand, a total cross section defined by including all diffraction beams was found to vary smoothly as a function of incident parameters, in a way similar to that observed on low corrugated surfaces and in gas phase scattering. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.481035
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  • 7
    Electronic Resource
    Electronic Resource
    Energy dependence of diffractive and rotationally inelastic scattering of D2 from NiAl(110) (2002)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 117 (2002), S. 2255-2263 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Diffraction and rotational transitions of D2 from NiAl(110) have been measured at incident energies between 88 and 157 meV. The measurements were done along the [11¯0] azimuth and using a set up which allows the recording of diffraction patterns at a fixed angle of incidence. Elastic first-order diffraction and rotationally inelastic diffraction peaks were observed over the whole incident energy range explored. The elastic diffraction data could be fitted using the simple Eikonal approximation only over a very narrow range of incident energies. Similarly, a Debye–Waller-type attenuation of diffraction intensities as a function of surface temperature was only verified at low incident energies (∼100 meV). The absolute 0→2 transition probability was found to increase from 10 to 20% in the energy range investigated, whereas the one corresponding to the 2→0 transition remained constant at 10%. An important conclusion of our work is that the behavior exhibited by these two transitions as a function of incident energy is independent of angle of incidence. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1488592
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  • 8
    Electronic Resource
    Electronic Resource
    A helium atom scattering study of the H/NiAl(110) adsorption system (2002)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 117 (2002), S. 1797-1803 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Hydrogen adsorption on NiAl(110) has been investigated by means of helium atom scattering. In agreement with previous studies, hydrogen adsorption was found to be activated on this surface. Two ordered adsorbate structures could be identified after exposure of atomic hydrogen at 90 K: a c(2×2) and a (1×1)H saturation phase. The structures of the clean and hydrogen covered surfaces were determined from a quantitative analysis of the corresponding He-diffraction spectra. For the clean surface, a very shallow corrugation in which only the topmost Al atoms appear is obtained from He-diffraction data, whereas both Ni and Al atoms are visible in the corrugation determined with Ne diffraction. Surprisingly, the total corrugation amplitude determined for the c(2×2) structure was as shallow as the one of the clean surface. This very unusual fact may be taken as an evidence for the existence of delocalized hydrogen on this phase. The hydrogen adsorption site in the (1×1)H phase was determined to be the Ni–Ni bridge site, with a H–Ni bond length of 1.75 Å, in agreement with previous ab initio calculations. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1486216
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  • 9
    Electronic Resource
    Electronic Resource
    A He-scattering study of the hydrogen-induced ''streaky phase'' of Ni(100)
    Amsterdam : Elsevier
    Surface Science 297 (1993), S. 162-166 
    Details
    ISSN: 0039-6028
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0039-6028(93)90259-M
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  • 10
    Electronic Resource
    Electronic Resource
    Relations between Thermal Calculation and Metallurgical Transformations during the Laser Surface Hardening Treatment in Plain Carbon Steel and S.G. Cast Iron (1991)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 46-47 (Jan. 1991), p. 189-208 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/58/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.46-47.189.pdf
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