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  • 1
    Electronic Resource
    Electronic Resource
    Mathematical model of internal temperature profile of GaAs during rapid thermal annealing (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 69 (1991), S. 8037-8041 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: In previous studies it was reported that GaAs samples which were rapid thermal annealed exhibit bright bands adjacent to the surfaces in cathodoluminescence images of the cross sections. It is possible that the presence and depth of these bright bands are related to thermal stresses in the GaAs resulting from thermal gradients during heating and cooling. To investigate this possibility, a one-dimensional mathematical model was developed to predict the temperatures through the thickness of the GaAs. Calculations of the thermal stress field show that the thermal stresses do not correlate with the depth of the bright bands.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.347449
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Enhancement of luminescence in GaAs by low levels of Cu (1991)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 58 (1991), S. 714-716 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: In a previous paper it was reported that GaAs, after rapid thermal annealing, exhibited bright regions adjacent to the sample surfaces in the cross-section cathodoluminescence image. In this report it is shown that these bright bands are associated with the presence of Cu, as indicated by photoluminescence measurements. It is proposed that the Cu diffuses into GaAs during annealing, from residual Cu on the sample surface. To test this hypothesis, samples were treated to alter the residual Cu prior to annealing. Removing the Cu markedly reduced the depth of the bright bands; adding Cu markedly increased the depth, in agreement with the proposed mechanism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.104524
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Examination of rapid thermal annealed GaAs using cathodoluminescence (1989)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 54 (1989), S. 2671-2673 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Samples of semi-insulating GaAs were annealed for 5–18 s at 650–950 °C using rapid thermal annealing. Cathodoluminescence was used to compare as-received and annealed samples to determine the effect of the heat treatment. Cathodoluminescence images of the surface of samples show a change in background intensity after heating. Images of cleaved cross sections indicate that the change is not uniform throughout the thickness of the sample.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.101031
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Combustion Temperatures: The Future? (1971)
    [s.l.] : Nature Publishing Group
    Nature 233 (1971), S. 239-241 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] An examination of the relative merits of burning at high and low temperatures leads to new proposals for designing future combustion systems for particular purposes so as to minimize pollution and optimize intensity and ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/233239a0
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Effect of nitrogen-containing plasmas on stability, NO formation and sooting of flames (1976)
    [s.l.] : Nature Publishing Group
    Nature 259 (1976), S. 556-557 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In an effort to approach practical conditions more closely, the combustion chamber was a model of a gas turbine flame tube provided by Ricardo & Co. Ltd, consisting of a cylindrical outer chamber (15x60 cm) fitted with a Perspex end-viewing window. The fuel is injected through a 'Sonicore' ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/259556a0
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Limits to energy release and utilisation from chemical fuels (1975)
    [s.l.] : Nature Publishing Group
    Nature 257 (1975), S. 367-370 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] New combustors effectively abolish limits of flammability and extend the concept of what is a fuel. By burning very lean mixtures they also minimise pollution and irretrievable energy losses during conversion. The theoretical saving is more than double the proportion currently contributed by all ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/257367a0
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  • 7
    Electronic Resource
    Electronic Resource
    Ignition by plasma jet (1978)
    [s.l.] : Nature Publishing Group
    Nature 272 (1978), S. 341-343 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Augmentation of combustion rates by radicals generated in discharge plasmas is not a new concept, for example, see rf. 2. The relative effectiveness of different plasmas for increasing combustion intensity has been studied in continuous flow, highly stirred systems, by Harrison and Weinberg3. In ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/272341a0
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Velocity Measurement by combining the Doppler Principle with the Schlieren Method (1969)
    [s.l.] : Nature Publishing Group
    Nature 221 (1969), S. 357-357 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] When the direction of a light beam is deflected through an angle, q, by encounter with an object moving at velocity, u, at right angles to the incident beam direction, the wavelength is altered due to the Doppler effect so that interference of this beam with an unperturbed one from the same source ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/221357a0
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    Paper (German National Licenses)
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  • 9
    Electronic Resource
    Electronic Resource
    Point Holograms as Optical Elements (1967)
    [s.l.] : Nature Publishing Group
    Nature 215 (1967), S. 239-241 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] A point hologram is formed on a photographic plate when a spherical wavefront interferes with a plane or another spherical wavefront. Such holograms behave like lenses or mirrors, but are easier and cheaper to produce and may replace them for certain applications involving coherent light. It seems ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/215239a0
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  • 10
    Electronic Resource
    Electronic Resource
    Flame-Arc Combination (1962)
    [s.l.] : Nature Publishing Group
    Nature 193 (1962), S. 736-738 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE existence of appreciable ionization in flames L was implied already in 1600 by the discovery of W. Gilbert, physician to Queen Elizabeth I, that flame gases would discharge an electroscope. More recently, effects of electric fields on flames involving changes in rate of propagation or in shape ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/193736a0
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