Improving the field emission of carbon nanotubes by lanthanum-hexaboride nano-particles decoration

  • Kumari M
  • Gautam S
  • Shah P
 et al. 
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Field emission of carbon nanotubes (CNTs) was remarkably improved by lanthanum-hexaboride (LaB6) nano-particles (NPs) decoration. CNTs were grown on the silicon substrate by chemical vapor deposition. Field emission of bare CNTs and LaB6-NPs decorated CNTs was carried out under same conditions. Physical, morphological, elemental, and graphitic nature changes were ascertained by scanning electron microscope, transmission electron microscope, energy dispersive x-ray spectroscopy, and Raman analysis. LaB6-NPs decorated CNTs show significant reduction of turn-on electric-field from 3.0 to 2.1 V/lm. A remarkable improvement of more than six-fold from 2.05 to 13.19 mA/cm2 at a field of 4.6 V/lm was also observed in the current-density.

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  • Monika Kumari

  • S. Gautam

  • P. V. Shah

  • S. Pal

  • U. S. Ojha

  • A. Kumar

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