The Effect of Hydrogen Dilution on the Morphology of Carbon Nanowalls Decorated Carbon Nanotubes Deposited by Hot-Wire r.f. Plasma Enhanced Chemical Vapour Deposition

Abstract:

An investigation on the effects of hydrogen (H₂) gas dilution on the morphology and growth of carbon nanowalls (CNWs) decorated carbon nanotubes (CNTs) by hot-wire r.f. plasma enhanced chemical vapour deposition technique is presented. With the assistance of nickel nanoparticle catalyst, CNWs decorated CNTs formed only under the presence of 25% of H₂ gas, relative to the methane (CH₄) gas precursor. By varying the amount of H₂ incorporated with CH₄, the role of H₂ dilution in the development of CNWs decorated CNTs was studied. Based on the FESEM and HRTEM results, it is hypothesized that H₂ density and relative carbon radical concentration are the important parameters for the deposition of CNWs decorated CNTs. The effect of H₂ dilution on the formation of CNWs decorated CNTs is presented.

• Periodical: Key Engineering Materials (Volume 694)
• Pages: 203-207
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.694.203
• Online since: May 2016
• Authors: Nur Maisarah Abdul Rashid, Wee Siong Chiu*, Noor Hamizah Khanis, Maisara Othman, Richard Ritikos, Saadah Abdul Rahman
• Keywords: Carbon Nanotubes, Carbon Nanowalls, H₂ Incorporation

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