Quantitative imaging of carbon dimer precursor for nanomaterial synthesis in the carbon arc

V. Vekselman, A. Khrabry, I. Kaganovich, B. Stratton, R. S. Selinsky, Y. Raitses

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

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 (C2) in sub-atmospheric-pressure carbon arc by laser-induced fluorescence. Measured spatial profiles of C2 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 C2 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 good agreement. The model predicts well the main processes determining spatial profiles of carbon dimers (C2).

Original languageEnglish (US)
Article number025008
JournalPlasma Sources Science and Technology
Volume27
Issue number2
DOIs
StatePublished - Feb 6 2018

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

Keywords

  • arc discharge
  • arc nanomaterial synthesis
  • atmospheric plasma diagnostic
  • laser induced fluorescence

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