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  • Articles: DFG German National Licenses  (7)
  • Electronic Resource  (7)
  • 1995-1999  (2)
  • 1980-1984  (5)
  • 1955-1959
  • 1998  (2)
  • 1984  (3)
  • 1982  (2)
Source
  • Articles: DFG German National Licenses  (7)
Material
  • Electronic Resource  (7)
Years
  • 1995-1999  (2)
  • 1980-1984  (5)
  • 1955-1959
Year
  • 1
    Electronic Resource
    Electronic Resource
    Transmission electron microscopy investigation of structural properties of self-assembled CdSe/ZnSe quantum dots (1998)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 72 (1998), S. 1329-1331 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: CdSe quantum dots on ZnSe, grown by molecular beam epitaxy and formed during reorganization of an initially uniform film by thermal activation, are microstructurally elucidated in cross section and plan view, using transmission electron microscopy. In diffraction contrast, an almost uniform wetting layer is clearly visible. Dark contrast features with a distinctly larger extension into growth direction mark the location of quantum dots. Individual quantum dots can be identified in high-resolution imaging both by lattice expansion and contrasts arising from their strain fields. Plan-view images show the coexistence of two classes of quantum dots with an average lateral size of ≤10 nm (area density 100 μm−2) and 10–50 nm (20 μm−2), respectively. The shape of the larger entities is pyramidlike. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.120984
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    CuAu-type ordering in epitaxial CuInS2 films (1998)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 73 (1998), S. 785-787 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Ordering of Cu and In atoms in near-stoichiometric CuInS2 epitaxial films grown on Si (111) by molecular beam epitaxy was studied by transmission electron microscopy. Nonchalcopyrite ordering of the metal atoms in CuInS2 is observed, which is identified as CuAu-type ordering. Sharp spots in electron diffraction patterns reveal the ordered Cu and In atom planes alternating along the [001] direction over a long range. High-resolution electron microscopy confirms this ordering. The CuAu-ordered structure coexists with the chalcopyrite ordered structure, in agreement with theoretical prediction. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.122001
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    3,3-Di-tert-butyl-N,4,5,6,7-pentaphenyl-1,2-dihydro-1,2,3-diazastannepine-1,2-dicarboximide monohydrate, C44H43N3O2Sn.H2O (1984)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 40 (1984), S. 1793-1795 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108270184009586
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Electrical polarization phenomena in poly (phenylquinoxaline) (PPQ) (1982)
    Springer
    Polymer bulletin 8 (1982), S. 527-534 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary Results are described of TSD- and TSP-measurements of Poly (Phenylquinoxaline) in dependence on the degree of annealing and on the polarizing field strength. Seven relaxations regions are investigated and discussed. Electronic and ionic space charge regions are observed and discussed in detail. It is shown that dielectric losses in polymers do not result from dipolar processes only, but also from translational motion of charge carriers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00262931
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Heat flow model of rapid solidification with nonhomogeneous thermal contact (1984)
    Springer
    Journal of materials science 19 (1984), S. 2145-2152 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract A heat flow model is presented of the solidification process of a thin melt layer on a heat conducting substrate. The model is based on the two-dimensional heat conduction equation, which was solved numerically. The effect of coexisting regions of good and bad thermal contact between foil and substrate is considered. The numerical results for thermal parameters of the Al-Cu eutectic alloy show considerable deviations from one-dimensional solidification models. Except for drastic differences in the magnitude of the solidification rate near the foil-substrate interface, the solidification direction deviates from being perpendicular to the substrate and large lateral temperature gradients occur. Interruption of the thermal contact may lead to back-melting effects. A new quantity, the effective diffusion length, is introduced which allows some conclusions to be drawn concerning the behaviour of the frozen microstructure during subsequent cooling.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01058090
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Measurement of the spectral flux density of negative muons at very low energies (1982)
    Springer
    The European physical journal 304 (1982), S. 333-334 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The spectral flux density of negative muons has been measured down to 5 eV.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01421514
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Extraktionsverhalten von Rutheniumnitrosyl-Komplexen in salpetersauren Lösungen (1984)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 319 (1984), S. 38-46 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Lösungen von Rutheniumnitrosylnitro-, Rutheniumnitrosylnitronitrato- und Rutheniumnitrosylnitrato-Komplexen lassen sich mit Hilfe von Papierelektrophorese, Extraktions-Chromatographie und Extraktionen eindeutig voneinander unterscheiden. Kontaktzeit, HNO3-Konzentration, NO 3 − -Konzentration, HDBP-Gehalt der organischen Phase und Zusatz von F−, SO 4 2− , H2PO 4 − und C2O 4 2− beeinflussen stark die Extraktion der Rutheniumnitrosylnitrato-Komplexe mit TBP in Dodecan.
    Notes: Summary Solutions of ruthenium-nitrosyl-nitro, ruthenium-nitrosyl-nitro-nitrato and ruthenium-nitrosyl-nitrato complexes can be distinguished clearly from each other by means of paper electrophoresis, extraction chromatography and extractions. The contact time, HNO3-concentration, NO 3 − -concentration, HDBP-content of the organic phase and the addition of F−, SO 4 2− , H2PO 4 − and C2O 4 2− exert a strong influence on the extraction of the ruthenium-nitrosyl-nitrato complexes with TBP in dodecane.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00476227
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    Paper (German National Licenses)
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