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  • Articles  (3)
  • Articles: DFG German National Licenses  (3)
  • Plasma chemistry  (3)
  • Springer  (3)
  • 2020-2022
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  • Articles  (3)
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  • Articles: DFG German National Licenses  (3)
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  • Springer  (3)
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  • 1
    Electronic Resource
    Electronic Resource
    Reactions of hydrogen peroxide vapor dissociated in a microwave plasma (1981)
    Springer
    Plasma chemistry and plasma processing 1 (1981), S. 191-200 
    Details
    ISSN: 1572-8986
    Keywords: Plasma chemistry ; microwave discharge ; hydrogen peroxide
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Technology
    Notes: Abstract Analysis of the plasma emission from a low-pressure microwave cavity discharge through flowing hydrogen peroxide vapor showed that both H and OH were produced in proportions which varied with the applied power. When the dissociated vapor was condensed at 195 K only water was obtained; at 77 K, H2O2 and H2O4 were also obtained. Their formation could not be increased by increasing the H atom or OH radical concentration in the plasma. When the reaction time of the dissociated vapor between the plasma exit and the cold surface was increased, the rate of H2O2 formation increased mostly at the expense of water formation. It appears that, as in the case of the reaction of H with O2, the rate of H2O2 formation is dependent on the concentration of O2 produced in the spatial afterglow by the gas-phase reactions of the hydroxyl radicals.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00564580
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  • 2
    Electronic Resource
    Electronic Resource
    Decomposition of CCl4 in an RF discharge—A gas chromatography and time-resolved emission spectroscopy study (1981)
    Springer
    Plasma chemistry and plasma processing 1 (1981), S. 247-260 
    Details
    ISSN: 1572-8986
    Keywords: Plasma chemistry ; plasma etching ; spectroscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Technology
    Notes: Abstract The decomposition of CCl4 in an rf discharge starts by a very fast electron attachment mechanism $$\begin{gathered} CCl_4 \xrightarrow{{ + e}}(CCl_4^ - ) \to CCl_3 + Cl^ - \hfill \\ \hfill \\ k_0 \hfill \\ \end{gathered}$$ A first-order rate constant, (k0 · ne) ≈ 10+2−10+3 s−1, is estimated by two-channel time-resolved emission spectroscopy. The ability of the method to detect the change of concentrations in plasma processes is discussed. A steady-state product distribution containing CCl4, C2Cl4, C2Cl6, Cl2, and glow polymer as main products is formed via recombination processes. The influence of plasma power density on this product distribution is given by gas-chromatographic results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00568833
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  • 3
    Electronic Resource
    Electronic Resource
    Dissociation and recombination of oxygen atoms produced in a microwave discharge. Part II. Theoretical calculations (1983)
    Springer
    Plasma chemistry and plasma processing 3 (1983), S. 79-95 
    Details
    ISSN: 1572-8986
    Keywords: Plasma chemistry ; chemical kinetics ; oxygen plasma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Technology
    Notes: Abstract In this study, the degree of dissociation and recombination of oxygen atoms produced by a microwave discharge in oxygen is examined by comparing a theoretical model of the kinetic mechanisms to chemical titration data. The results show that a one-dimensional, temperature-dependent model of the neutral species of the system can predict the oxygen atom concentration profile as measured by nitrogen dioxide titration. The model also indicates that the temperature of the gas is approximately 1000 K and that an overall gas temperature and velocity increase is due to electrical heating by the microwave discharge and not due to the enthalpy change of the species in the system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00566029
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    Paper (German National Licenses)
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