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  • 33.80.Gj  (1)
  • PACS: 61.14.Hg; 61.65.+d; 68.55.Ce; 68.55.Jk  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Structural manipulation of ultrathin organic films on metal surfaces: the case of decane thiol/Au(111) (1997)
    Springer
    Applied physics 65 (1997), S. 375-377 
    Details
    ISSN: 1432-0630
    Keywords: PACS: 61.14.Hg; 61.65.+d; 68.55.Ce; 68.55.Jk
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: 3 (CH2)9]SH) have been adsorbed on Au(111) single crystals both via vacuum deposition and from an ethanolic solution. The epitaxial structure of the ultrathin organic films has been identified at room temperature via low-energy electron diffraction to be c(4 $\sqrt{3}$ ×2 $\sqrt{3}$ )R30° for the solution grown film and rectangular c(23× $\sqrt{3}$ ) for the vacuum deposited film. These structures correspond to molecules adsorbed on the surface with their carbon chains flat on the surface (vacuum deposited) and nearly perpendicular (solution grown). It is demonstrated that this orientation can be changed reversibly in vacuum via either annealing the films or exposing them to additional gas.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003390050594
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Kinetics of photo-induced dissociation of Na clusters deposited on Mica (1993)
    Springer
    The European physical journal 28 (1993), S. 321-329 
    Details
    ISSN: 1434-6079
    Keywords: 36.40. + d ; 32.80.Wr ; 33.80.Gj
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Na clusters bound to mica surfaces have been irradiated with pulsed and cw visible laser light. Kinetic energy and angular distributions of the Na atoms desorbing from the clusters have been determined using cw two-photon laser-induced fluorescence detection. In addition the dependence of the desorption rate on laser power, wavelength and polarization has been measured. The most probable kinetic energyE kin of the photodesorbed atoms at the surface temperatureT S =300 K was found to beE kin=18±5 meV, independent of laser irradiance (3 µJ/cm2...20 mJ/cm2) and wavelength (450 nm, 505 nm, 658 nm). With increasing orientation angle between detection axis and surface normal (0°≦Θ≦90°)E kin was observed to decrease slightly, while it was nearly independent of surface temperature betweenT S =30 K andT S =300 K. Also, with increasing radius of the Na clusters the desorbing Na atoms slowed down. The angular distribution of the Na atoms was of cos2-type with respect to the surface normal. These observations suggest that laser-induced desorption of Na from Na clusters bound to mica surfaces involves an initial rate-limiting step of direct surface plasmon excitation followed by a final step of delayed thermal desorption.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01437267
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    Paper (German National Licenses)
    Fulltext
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