Please use this identifier to cite or link to this item: http://arks.princeton.edu/ark:/88435/dsp01pc289m744
 Title: Quantitative imaging of carbon dimer precursor for nanomaterial synthesis in the carbon arc Contributors: Vekselman, V.Khrabry, A.Kaganovich, I.Stratton, B.Selinsky, R. S.Raitses, Y.U. S. Department of Energy contract number DE-AC02-09CH11466 Keywords: arc nanomaterial synthesislaser induced fluorescenceatmospheric plasma diagnosticarc discharge Issue Date: Jan-2018 Publisher: Princeton Plasma Physics Laboratory, Princeton University Related Publication: Plasma Sources Science and Technology, vol. 27, p. 02008, 2018 Abstract: Delineating the dominant processes responsible for nanomaterial synthesis in a plasma environment requires measurements of the precursor species contributing to the growth of nanostructures. We performed comprehensive measurements of spatial and temporal profiles of carbon dimers in sub-atmospheric-pressure carbon arc by laser-induced fluorescence. Measured spatial profiles of carbon dimers coincide with the growth region of carbon nanotubes (Fang et al 2016 Carbon 107 273-80) and vary depending on the arc operation mode, which is determined by the discharge current and the ablation rate of the graphite anode. The carbon dimer density profile exhibits large spatial and time variations due to motion of the arc core. A comparison of the experimental data with the 2D simulation results of self-consistent arc modeling shows a good agreement. The model predicts well the main processes determining spatial profiles of carbon dimers. URI: http://arks.princeton.edu/ark:/88435/dsp01pc289m744 Referenced By: https://doi.org/10.1088/1361-6595/aaa735 Appears in Collections: Plasma Science & Technology

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