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    Self-organisation processes in the carbon arc for nanosynthesis

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    1.4906784.pdf (757.9Kb)
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    https://aip.scitation.org/doi/10.1063/1.4906784
    Permanent Link
    https://doi.org/10.1063/1.4906784
    http://hdl.handle.net/11603/22138
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    • UMBC Goddard Planetary Heliophysics Institute (GPHI)
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    Author/Creator
    Ng, Jonathan
    Raitses, Y.
    Date
    2015-02-13
    Type of Work
    7 pages
    Text
    journal articles
    Citation of Original Publication
    Ng, Jonathan; Raitses, Y.; Self-organisation processes in the carbon arc for nanosynthesis; Journal of Applied Physics 117, 063303, 13 February, 2015; https://doi.org/10.1063/1.4906784
    Rights
    This item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.
    Abstract
    The atmospheric pressure carbon arc in inert gases such as helium is an important method for the production of nanomaterials. It has recently been shown that the formation of the carbon deposit on the cathode from gaseous carbon plays a crucial role in the operation of the arc, reaching the high temperatures necessary for thermionic emission to take place even with low melting point cathodes. Based on observed ablation and deposition rates, we explore the implications of deposit formation on the energy balance at the cathode surface and show how the operation of the arc is self-organised process. Our results suggest that the arc can operate in two different ablation-deposition regimes, one of which has an important contribution from latent heat to the cathode energy balance. This regime is characterised by the enhanced ablation rate, which may be favourable for high yield synthesis of nanomaterials. The second regime has a small and approximately constant ablation rate with a negligible contribution from latent heat.


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    Albin O. Kuhn Library & Gallery
    University of Maryland, Baltimore County
    1000 Hilltop Circle
    Baltimore, MD 21250
    www.umbc.edu/scholarworks

    Contact information:
    Email: scholarworks-group@umbc.edu
    Phone: 410-455-3544


    If you wish to submit a copyright complaint or withdrawal request, please email mdsoar-help@umd.edu.