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  • 1
    Electronic Resource
    Electronic Resource
    Influence of the interface structure on the barrier height of homogeneous Schottky contacts (1999)
    Springer
    The European physical journal 7 (1999), S. 457-466 
    Details
    ISSN: 1434-6036
    Keywords: PACS. 73.30.+y Surface double layers, Schottky barriers, and work functions - 73.40.Ei Rectification
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: Unreconstructed interfaces may be prepared by evaporation of thick Pb films onto surfaces at room temperature. Current-voltage and capacitance-voltage characteristics of such Schottky contacts were measured in the temperature range between 140 and 300 K. The experimental data are analyzed by applying the thermionic-emission theory of inhomogeneous metal-semiconductor contacts as well as the “standard” thermionic-emission theory. From both methods the Schottky barrier height of laterally homogeneous contacts results as 0.724 eV. This value is by 74 meV larger than the previously observed barrier heights of laterally homogeneous interfaces. Similar differences were reported for unreconstructed and reconstructed Al- and contacts. The reduced barrier heights of all these interfaces are explained by the electric dipole associated with the stacking faults of reconstructions at surfaces and interfaces.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100510050634
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  • 2
    Electronic Resource
    Electronic Resource
    Remarks on the detection of phenols in airborne particulate matter (1986)
    Springer
    Chromatographia 22 (1986), S. 191-193 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography/mass spectrometry ; Column liquid chromatography ; Phenols ; Suspended particulate matter
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Samples of suspended particulate matter collected in Duisburg were investigated for phenolic compounds. The loaded filters were extracted with dichloromethane for 10 hours in a soxhlet apparatus. The concentrated extract was resolved in cyclohexane and separated into a non polar and a polar fraction on alumina. The polar fraction was taken up in dichloromethane and steam-distilled. The distillate was extracted with ether. After the evaporation of the ether, the residue was resolved in dichloromethane and allowed to react with benzoyl chloride. After adding toluene the solution was reduced in volume and analyzed in a GC-MS system. For the separation of phenols by means of HPLC the enrichment of the phenols was performed without benzoylization. Six phenols were detected: hydroxibenzene, methylhydroxibenzene, hydroxibiphenyl, hydroxifluorene, benzylhydroxibenzene and dihydroxibiphenyl.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02257326
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    Paper (German National Licenses)
    Fulltext
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