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  • 1
    Electronic Resource
    Electronic Resource
    Chemisorption of halogens on silver a critical comparison of results from photqemission and thermal desorption spectroscopy (1989)
    Springer
    Applied physics 49 (1989), S. 313-320 
    Details
    ISSN: 1432-0630
    Keywords: 79.60.−i ; 82.65.My
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Conflicting thermal desorption (TDS) results from submonolayer coverages of atomic Cl, Br or I on Ag(100), Ag(110) or Ag(111) stimulated us to check for the possible influence of different sample preparation procedures. We present experimental evidence, that a combined approach using TDS and angle-resolved ultraviolet photoemission may help to distinguish between “better” and “worse” surface preparation. We present detailed new results for the Cl/Ag(110) system. From our observations we conclude that all three halogens listed above give one and only one TDS peak in the submonolayer regime and show very similar adsorption/desorption-characteristics. This fact removes the apparent contradictions reported in the literature and demonstrates that the halogen-Ag bond is not very sensitive to the surface crystallography.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00616860
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    UV-photoelectron spectroscopy with lateral resolution (1991)
    Springer
    Applied physics 53 (1991), S. 410-413 
    Details
    ISSN: 1432-0630
    Keywords: 79.60.−i
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract We have built and tested a novel type of scanning photoemission microscope. The instrument uses ultraviolet emission lines at photon energies of 16.8 eV (Ne I), 21.2 eV (He I) and 40.8 eV (He II). The radiation is focused into a spot of about 2 μm diameter on the specimen surface by means of an ellipsoidal mirror. The emitted photoelectrons are recorded in normal emission geometry by a standard electron energy analyzer. Two modes of operation are possible: spatially resolved electron energy distribution curves may be recorded from a fixed point on the sample. As the specimen is scanned piezo-mechanically in two dimensions across the beam, images within a fixed electron energy bandwith may be formed. We report on the realization and performance of the new microscope.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00348153
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Interaction of atomic hydrogen with the graphite single-crystal surface (1992)
    Springer
    Applied physics 55 (1992), S. 489-492 
    Details
    ISSN: 1432-0630
    Keywords: 79.60.−i ; 82.65.−i
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract We have studied the chemisorption of atomic hydrogen on the basal plane of natural graphite single crystals. LEED and angle-resolved photoemission were used to characterize the clean surface. The adsorption of H saturates at rather low exposures, accompanied by a decrease of the work function by Δφ=(100±20) meV. The photoemission spectra indicate a clear carbon-hydrogen interaction, leading to shifts of substrate bands by up to about 200 meV. No detectable etching of the surface occurs at room temperature, in agreement with earlier work. Our results are qualitatively consistent with theoretical considerations about a strong H(1s)-C(2p z) chemical bond.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00348338
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    Paper (German National Licenses)
    Fulltext
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