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  • 11
    Electronic Resource
    Electronic Resource
    NMR and cross relaxation of substitutional and interstitial12B in vanadium (1990)
    Springer
    Hyperfine interactions 60 (1990), S. 761-764 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Cross-relaxation resonances of the polarization of12B nuclei in single-crystal Vanadium were observed at various values of the external B field. From the comparison with calculated relaxation spectra the electric field gradients at the neighbouring host nuclei were determined and the locations of12B were found to be the substitutional and the octahedral interstitial sites.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02399864
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  • 12
    Electronic Resource
    Electronic Resource
    β-radiation detected nuclear magnetic resonance studies of point defects in semiconductors (1993)
    Springer
    Hyperfine interactions 79 (1993), S. 591-607 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract An introduction to the principles of the β-NMR method is presented and its potential in the field of defect research in semiconductors is discussed. This is followed by a review of experimental applications to date and a description of several examples in some detail.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00567582
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  • 13
    Electronic Resource
    Electronic Resource
    Cross relaxation studied by β NMR (1989)
    Springer
    Hyperfine interactions 49 (1989), S. 235-252 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The dipole-dipole interaction between polarized β active probes implanted into a metal and the surrounding host nuclei may lead to a transfer of polarization from the probe to the host. As energy must be conserved in this cross-relaxation (CR) process, resonance-like dips show up at certainB values, if the polarization of the probes is measured as a function of magnetic inductionB. The probe isotope12B has been studied in several metallic stoppers. For12B in the fec crystals Al, Cu the three possible cubic implantation sites could easily be discriminated by means of the CR technique. The temperature dependence of the dips yielded information on the diffusion of the probes. In the case of12B, in Cu above 400 K a further CR structure was found due to trapping of the probe at another site. In the bcc metal VCR spectra belonging to two different12B trapping sites could be separately registered using a special radiofrequency technique. Both, static and dynamical properties of the CR could be quantitatively explained by theory.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02405144
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  • 14
    Electronic Resource
    Electronic Resource
    Interstitial related defect of12B implanted into n- and p-type silicon (1993)
    Springer
    Hyperfine interactions 79 (1993), S. 655-658 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract β-radiation detected nuclear magnetic resonance (β-NMR) measurements of12B occupying sites with noncubic surroundings after implantation into Si have been extended from p-type to moderately doped n-type material. The quadrupole split signals observed in both materials indicate the existence of the same interstitial related boron defect but with lower thermal stability in n-type Si.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00567591
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  • 15
    Electronic Resource
    Electronic Resource
    Oberflächenoxyde des Kohlenstoffs (1964)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 76 (1964), S. 742-751 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Bei der Oxydation graphitischen Kohlenstoffs bilden sich an den Rändern der Kohlenstoffschichten saure Oberflächenoxyde (oder -hydroxyde bei Anwesenheit von Wasser). Mit mikrokristallinem Kohlenstoff ergab sich, daß bei der Reaktion mit Sauerstoff bei 400 bis 450°C vier Gruppen unterschiedlicher Acidität entstehen: Je eine stärker saure und eine schwächer saure Carboxylgruppe sowie eine phenolische Hydroxylgruppe wurden nachgewiesen. Wahrscheinlich liegt außerdem eine Carbonylgruppe vor. Mit gelösten Oxydationsmitteln bildet sich bei Zimmertemperatur zusätzlich ein Äquivalent einer stärker sauren Carboxylgruppe.  -  Die möglichen Konstitutionen der sauren Oberflächenoxyde werden diskutiert. Auch an der Oberfläche des Diamanten werden Oberflächenoxyde gebildet, die sich chemisch nachweisen lassen. Beim Einwirken von Sauerstoff bei 800 bis 900°C unter geringem Druck wird Diamant in schwarzen Kohlenstoff umgewandelt. Dabei spielen Oberflächenoxyde eine Rolle.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19640761704
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  • 16
    Electronic Resource
    Electronic Resource
    Surface Oxides of Carbon (1964)
    Weinheim : Wiley-Blackwell
    Angewandte Chemie International Edition in English 3 (1964), S. 669-677 
    Details
    ISSN: 0570-0833
    Keywords: Surface chemistry ; Oxides ; Carbon ; Graphite ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: On oxidation of graphitic carbon, acidic surface oxides (or hydroxides in the presence of water) are formed at the boundaries of the carbon layers. It was found that the reaction of oxygen with microcrystalline carbon at 400-450°C yields four groups of different acidities. One strongly acidic group and one weakly acidic carboxyl group have been detected, as well as a phenolic hydroxyl group; a carbonyl group is probably also present. With dissolved oxidizing agents, one equivalent of another strongly acidic carboxyl group is formed in addition at room temperature. The possible constitutions of the acidic surface oxides are discussed. Chemically detectable surface oxides are also formed on the surface of diamond. In the presence of oxygen at 800-900°C under reduced pressure, diamond is transformed into black carbon. Surface oxides play a part in this transformation.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/anie.196406691
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