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  • 1
    Electronic Resource
    Electronic Resource
    Adsorbate-surface interaction studied by second-harmonic generation in total reflection (1991)
    Springer
    Molecular engineering 1 (1991), S. 179-190 
    Details
    ISSN: 1572-8951
    Keywords: Second-harmonic generation ; adsorbate-surface interaction ; LB-type monolayer ; concentration series ; total reflection geometry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract We have studied the coherent superposition of nonlinear optical signals due to the substrate background and an organic surface layer deposited on this substrate by second-harmonic generation (SHG). The increased sensitivity of the total reflection geometry used permits identification of subtle details of this superposition; for example partial cancellation of the phase-reversed SH-signals or the observation of a coverage-density-dependent tilt angle of the organic chromophores. The second-harmonic signals from the Langmuir-Blodgett-type monolayers exceed the SH-response of the adsorbates prepared by simple wetting with chloroform solutions of the same amphiphilic dyes by two orders of magnitude under identical coverage-density conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00161662
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  • 2
    Electronic Resource
    Electronic Resource
    Second-order susceptibilities of anisotropic liquid-crystal thin films (1992)
    Springer
    Molecular engineering 1 (1992), S. 341-355 
    Details
    ISSN: 1572-8951
    Keywords: Second-harmonic generation ; liquid crystals ; orientation analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Using optical second-harmonic generation, we have measured the anisotropic orientation behavior of liquid crystal (LC) molecules in thin films. A high degree of in-plane anisotropy was obtained by depositing the LC films onto rubbed polyimide-covered substrates. The analysis with respect to the relevant second-order susceptibility tensor components is based upon the experimental results obtained in transmission geometry using different angles of incidence for the separation of isotropic and anisotropic contributions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00176806
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