Open Access

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2018-07-18
08:23
OpenAccess [FZJ-2018-04283] Book/Report

Mechanische Relaxationsmessungen an Al-Metallisierungsschichten
[Juel-2780]
Jülich : Forschungszentrum Jülich GmbH Zentralbibliothek Verlag, Berichte des Forschungszentrums Jülich 2780, 75 p. ()
Bei der Messung der Inneren Reibung in polykristallinen Aluminiumdrähten fand K$\hat{e}$ /1,2/ ein Dämpfungsmaximum, das in einkristallinem Al nicht beobachtetwurde. Die Auswertung des Maximums lieferte eine Aktivierungsenergie von 1,4 eV, die im Bereich der Aktivierungsenergie der Volumenselbstdiffusion in Al liegt.Dagegen wurden von Berry und Pritchet /3/ sowie von Vollkommer et al. [...]
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2018-07-18
07:59
OpenAccess [FZJ-2018-04281] Book/Report

Isolierung und Charakterisierung der secY-Gene aus Bacillus licheniformis und Staphylococcus carnosus
[Juel-2779]
Jülich : Forschungszentrum Jülich GmbH Zentralbibliothek Verlag, Berichte des Forschungszentrums Jülich 2779, 83 p. ()
Gram-positive Bakterien sekretieren häufig große Proteinmengen in das Medium. Aus diesem Grund finden sie in der Industrie vielfach Anwendung in der Produktion extrazellulärer Enzyme. [...]
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2018-07-18
07:34
OpenAccess [FZJ-2018-04280] Book/Report

Untersuchungen zur Synthese, Charakterisierung und Bioverteilung von Komplexen des Technetiums ($^{99}$Tc/$^{99}$Tc) mit 2-Amino-2-deoxy-D-hexoseoximen)
[Juel-2777]
Jülich : Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag, Berichte des Forschungszentrums Jülich 2777, III, 166 p. ()
In view of the diverse potential applications of technetium complexes in nuclear medicine diagnostics, it is of interest to produce such complexes which behave similarly to D-hexoses in the organism. According to the current state-of-the-art, it has not yet proved possible to complex technetium in weighable quantities with hexoses or their derivatives and to determine the bio-distribution of the characteristic complexes in the organism. [...]
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2018-07-17
15:26
OpenAccess [FZJ-2018-04274] Journal Article
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Coherently Embedded Ag Nanostructures in Si: 3D Imaging and their application to SERS
Surface enhanced Raman spectroscopy (SERS) has been established as a powerful tool to detect very low-concentration bio-molecules. One of the challenging problems is to have reliable and robust SERS substrate. [...]
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2018-07-17
15:19
OpenAccess [FZJ-2018-04273] Journal Article
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Scanning transmission electron microscopy strain measurement from millisecond frames of a direct electron charge coupled device
A high-speed direct electron detection system is introduced to the field of transmission electron microscopy and applied to strain measurements in semiconductor nanostructures. In particular, a focused electron probe with a diameter of 0.5 nm was scanned over a fourfold quantum layer stack with alternating compressive and tensile strain and diffracted discs have been recorded on a scintillator-free direct electron detector with a frame time of 1 ms. [...]
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2018-07-17
15:03
OpenAccess [FZJ-2018-04270] Journal Article
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Direct Measurement of Polarization-Induced Fields in GaN/AlN by Nano-Beam Electron Diffraction
The built-in piezoelectric fields in group III-nitrides can act as road blocks on the way to maximizing the efficiency of opto-electronic devices. In order to overcome this limitation, a proper characterization of these fields is necessary. [...]
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2018-07-17
14:57
OpenAccess [FZJ-2018-04269] Journal Article
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Materials characterisation by angle-resolved scanning transmission electron microscopy
Solid-state properties such as strain or chemical composition often leave characteristic fingerprints in the angular dependence of electron scattering. Scanning transmission electron microscopy (STEM) is dedicated to probe scattered intensity with atomic resolution, but it drastically lacks angular resolution. [...]
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2018-07-17
11:31
OpenAccess [FZJ-2018-04262] Book/Report
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Fourth field experiment on atmospheric dispersion around the isolated hill Sophienhöe in September 1989: methods - experiments - data bank
[Juel-2776]
Jülich : Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag, Berichte des Forschungszentrums Jülich 2776, VIII, 201 p. ()
In order to establish a data bank for the validation of advanced dispersion models, comprehensive meteorolo gical measurements and dispersion experiments in acomplex terrain with a well measured topography were carried out. These investigations became possible in cooperation with several external groups and with the financial support of the "Bundesminister für Umwelt, Naturschutz and Reaktorsicherheit". [...]
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2018-07-17
10:24
OpenAccess [FZJ-2018-04253] Book/Report

GaAs-Kristallzucht unter Stöchiometriekontrolle
[Juel-2774]
Jülich : Forschungszentrum Jülich GmbH Zentralbibliothek Verlag, Berichte des Forschungszentrums Jülich 2774, 99 p. ()
Untersucht wurden die Beziehungen zwischen gasförmigen, flüssigen und festen Phasen im GaAs-System, insbesondere Ga$_{1-y}$As$_{y}$(l) $\Rightarrow$ Ga$_{1-x}$As$_{x}$(c). Als Proben dienten GaAs-Kristalle definierter Stöchiometrie, die unter definiertem As-Druck gezüchtet wurden [...]
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2018-07-17
10:10
OpenAccess [FZJ-2018-04252] Book/Report

Pulvermetallurgischer Spritzguß von Niob-Superlegierungen
[Juel-2773]
Jülich : Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag, Berichte des Forschungszentrums Jülich 2773, 134 p. ()
The new. Metal Injection Molding (MIM) technique utilizes the shaping of plastic injection molding to produce of powder metallurgy parts. [...]
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