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  • 1
    Electronic Resource
    Electronic Resource
    On thickness dependence of electrical and optical properties of Te thin films (1998)
    Springer
    Applied physics 66 (1998), S. 357-361 
    Details
    ISSN: 1432-0630
    Keywords: PACS: 68.55.Jk; 73.61.Cw; 78.66.Db
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003390050678
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  • 2
    Electronic Resource
    Electronic Resource
    High-resolution work function imaging of single grains of semiconductor surfaces (2002)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 80 (2002), S. 2979-2981 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The size reduction of modern electronic devices creates a growing demand for characterization tools to determine material properties on a nanometer scale. The Kelvin probe force microscope is designed to obtain laterally resolved images of the sample's work function. Using a setup in ultrahigh vacuum, we were able to distinguish work function variations for differently oriented crystal facets of single grains on a semiconductor surface. For the tetragonal solar cell material CuGaSe2 the experiments demonstrate differences as low as 30 meV between (102) and (111) oriented surfaces and up to 255 meV between (1¯1¯2¯) and (110) surfaces. This influences the band bending of solar cell heterostructures and consequently also the solar power conversion efficiency. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1471375
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  • 3
    Electronic Resource
    Electronic Resource
    Electrical conductivity and Seebeck coefficient of some new organic semiconductors
    Amsterdam : Elsevier
    Applied Surface Science 65-66 (1993), S. 371-375 
    Details
    ISSN: 0169-4332
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0169-4332(93)90688-8
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  • 4
    Electronic Resource
    Electronic Resource
    Influence of deposition conditions on the structural characteristics of sublimated CdTe thin films (2000)
    Springer
    Applied physics 70 (2000), S. 565-571 
    Details
    ISSN: 1432-0630
    Keywords: PACS: 61.10.Nz; 68.55.Jk; 81.15.Ef
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract. In this paper the results obtained by X-ray diffraction studies on the structural characteristics of CdTe thin films deposited onto glass substrates by close-spaced sublimation technique are presented. Using different experimental arrangements and appropriate settings for growth parameters, the films with different polycrystalline structures were prepared. The geometry and the volume of the deposition chamber influence the size of film crystallites and also their preferential orientation. The role of deposition parameters such as the substrate temperature, the incidence angle, the film thickness, and the heat treatment in determination of the structural properties of the films are also investigated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003390051081
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  • 5
    Electronic Resource
    Electronic Resource
    Spectrophotometric and Paper Electrophoretic Studies of Uranium(IV) Polyoxotungstogermanate Complexes (2000)
    Springer
    Journal of radioanalytical and nuclear chemistry 245 (2000), S. 353-356 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The starting point of this study is the monolacunar structure of the Keggin polytungstate anion [GeW11O39]8−having the capacity of functioning as the coordinating ligand for the uranium U4+ cation, and the formation of the complex polytungstate anions of the [U(GeW11O39)2]12− type. The pH range of the complex formation was established and the stability constants were calculated by the electrophoresis method. By applying the molar ratio method to spectrophotometry, the molar ratio of polyoxometalate ligands and U4+ cations have been found to have the values of 1:1 and 2:1, respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006774808284
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  • 6
    Electronic Resource
    Electronic Resource
    Homogeneous isotope exchange between tungsten(VI) and Keggin and Dawson type uranium polyoxotungstophosphates (1999)
    Springer
    Journal of radioanalytical and nuclear chemistry 242 (1999), S. 119-122 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The present paper is concerned with the isotope exchange between185W and tungsten, and32P and phosphorus respectively, in uranium(IV) trivacant Keggin and Dawson polyoxotungstophosphate complexes, in water. These studies were carried out at different concentrations and temperature. The isotope exchange rate increases with the temperature and the reagents' concentration. The experimental results show that the complexes are labile kinetically.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02345903
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  • 7
    Electronic Resource
    Electronic Resource
    Keggin Polyoxotungstoborate with Uranium(IV) (2000)
    Springer
    Journal of radioanalytical and nuclear chemistry 245 (2000), S. 363-366 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract A new uranium tungstoborate heteropolyanion K12[U(BW11O39H)2]·23 H2O has been prepared and investigated by thermal analyses, IR, UV-Vis spectroscopy and magnetic susceptibility measurements. The compound obtained from Keggin monolacunary anions is 1:2 sandwich-type and exhibits a square antiprismatic stereochemistry for uranium (IV) ion.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006778909193
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  • 8
    Electronic Resource
    Electronic Resource
    Uranium(IV) polyoxotungstophosphates (1999)
    Springer
    Journal of radioanalytical and nuclear chemistry 242 (1999), S. 467-472 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Two tris(oxouranium)-substituted Keggin and Dawson sandwich-type tungstophosphate heteropolyanions Na12[(UO)3(H2O)6(PW9O34)2]·21 H2O (1) and Na18[(UO)3(H2O)6(P2W15O56)2]·27 H2O (2) have been prepared by reaction of uranium sulphate with [PW9O34]9− and [P2W15O56]12−, respectively, in aqueous media at 4.7 pH. The products were characterized by elemental and thermal analyses, IR, UV-Vis spectroscopy and magnetical susceptibility. The results of these studies suggest that the compounds obtained from Keggin and Dawson trilacunary anions are 2∶3 sandwich-type complexes and both exhibit a square antiprismatic stereochemistry for uranium(IV) with retention of polyoxometallate parent structure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02345579
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  • 9
    Electronic Resource
    Electronic Resource
    Viscometric characterization of aromatic polysulfones. Determination of intrinsic viscosity by single point techniques (1990)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 41 (1990), S. 21-24 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Die Anwendbarkeit der Verfahren, bei denen die Viskosität bei nur einer Konzentration gemessen wird, zur Berechnung der Grenzviskosität von fraktionierten aromatischen Sulfonen wurde untersucht. Einige charakteristische Konstanten der Polymerlösungen wurden bestimmt.
    Notes: The applicability of single point methods for the calculation of the intrinsic viscosity of fractionated aromatic polysulfones in investigated. Some characteristic constants of the polymer solutions were determined.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1990.010410106
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  • 10
    Electronic Resource
    Electronic Resource
    Poly(vinyl chloride) blends. II. Extrusion characteristicsPart I: Angew. Makromol. Chemie 144 (1986) 193 (1987)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 38 (1987), S. 286-291 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: An nicht plastifizierten PVC-Mischungen wurde der Einfluö von chloriertem Polyethylen (CPE) und der Schnecken-drehzahl auf die Extrusionsparameter untersucht. Bei Mischungen ohne Füllstoff haben die Kurven für die wichtigsten Extrusionsparameter (mit Ausnahme der Fließgeschwindigkeit des extrudierten Materials) die für Polymermischungen charakteristische Form. Ein Zusatz von 10 Teilen Tonerde auf 100 Teile PVC führt zu einer Änderung der Kurven, die bei dem System mit 7,0 Teilen CPE ein Minimum aufweisen. Bei diesem CPE-Gehalt liegen die Extrusionsparameter der Mischungen mit 10 Teilen Tonerde sehr nahe bei denen der Mischungen ohne Füllstoff.
    Notes: The influence of chlorinated polyethylene (CPE) and of the screw speed on the extrusion characteristics of unplasticized PVC blends, with and without addition of clay as a filling material, was investigated. For the blends with no filling material the curves of variation of the main extrusion characteristics (except the flow rate of the extruded material) exhibit shapes characteristic to polymer blends. The introduction of 10 parts of clay per 100 parts of PVC leads to a change of the curves, which exhibit a minimum for 7.0 parts CPE in the system. For this CPE content the values of the extrusion characteristics of the blends containing 10 parts clay approach very well those of the compounds without filling material.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1987.010380507
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