Heterogeneous Nanotubes: (X*CNTs, X*BNNTs)

Golberg, Dmitri; Terrones, Mauricio

doi:10.1002/9781119954743.ch6

Cited by 3 publications

(1 citation statement)

References 323 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Such nanotubes can be synthesized by Chemical Vapor Deposition (CVD), laser ablation or arc discharge using various (gaseous or solid) sources of B, C and N. The electric arc process offers the advantage of performing in-situ substitution of carbon atoms, i.e., the substitution is achieved while the nanotubes grow instead of through a post-treatment. Unfortunately, it is noteworthy that very few results are available in the literature regarding the synthesis of B x C y N z nanotubes using this technique [7] . It is then worth investigating further this route by using an original approach consisting in relating the synthesis conditions to the plasma parameters and to the characteristics (morphology, texture, structure, and chemical composition) of the carbon nanoforms obtained.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of (B-C-N) Nanomaterials by Arc Discharge Using Heterogeneous Anodes

Gourari

Razafinimanana

Monthioux

et al. 2016

Plasma Sci. Technol.

View full text Add to dashboard Cite

In spite of the current prevalence of the CVD-based processes, the electric arc remains an interesting process for the synthesis of carbon nanoforms, thanks to its versatility, robustness and easiness. It also allows performing in-situ substitution of carbon atoms by hetero-elements in the graphene lattice. Our work aims to establish a correlation between the plasma properties, type and chemical composition (and the substitution rate) of the obtained single-wall carbon nanotubes. The plasma was characterized by optical emission spectroscopy and the products were analyzed by high resolution transmission electron microscopy and core level Electron Energy-Loss Spectroscopy (EELS). Results show that a high boron content leads to a plasma temperature decrease and hinders the formation of nanotubes. This effect can be compensated by increasing the arc current and/or yttrium content. The optimal conditions for the synthesis of boron-and/or nitrogen-substituted nanotubes correspond to a high axial plasma temperature associated to a strong radial gradient. EELS analysis confirmed that the boron incorporates into the graphenic lattice.

show abstract

Section: Introductionmentioning

confidence: 99%