Classification of carbon nanostructure families occurring in a chemically activated arc discharge reaction

Dallas, Panagiotis; Meysami, Seyyed Shayan; Grobert, Nicole; Porfyrakis, Kyriakos

doi:10.1039/c5ra26325e

Cited by 8 publications

(1 citation statement)

References 49 publications

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“…On the other hand, the suspended carpets yielded a rather interesting composite consisting of graphite, CVD MWCNTs and arc-discharge-like CNTs 67 . The preliminary results are presented in the supplementary information.…”

Section: Plasma Treatment Of Large-area Carpets Of Ultra-long Mwcntsmentioning

confidence: 99%

Ultra-stiff large-area carpets of carbon nanotubes

et al. 2016

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Herewith, we report the influence of post-synthesis heat treatment (≤2350 °C and plasma temperatures) on the crystal structure, defect density, purity, alignment and dispersibility of free-standing large-area (several cm(2)) carpets of ultra-long (several mm) vertically aligned multi-wall carbon nanotubes (VA-MWCNTs). VA-MWCNTs were produced in large quantities (20-30 g per batch) using a semi-scaled-up aerosol-assisted chemical vapour deposition (AACVD) setup. Electron and X-ray diffraction showed that the heat treatment at 2350 °C under inert atmosphere purifies, removes residual catalyst particles, and partially aligns adjacent single crystals (crystallites) in polycrystalline MWCNTs. The purification and improvement in the crystallites alignment within the MWCNTs resulted in reduced dispersibility of the VA-MWCNTs in liquid media. High-resolution microscopy revealed that the crystallinity is improved in scales of few tens of nanometres while the point defects remain largely unaffected. The heat treatment also had a marked benefit on the mechanical properties of the carpets. For the first time, we report compression moduli as high as 120 MPa for VA-MWCNT carpets, i.e. an order of magnitude higher than previously reported figures. The application of higher temperatures (arc-discharge plasma, ≥4000 °C) resulted in the formation of a novel graphite-matrix composite reinforced with CVD and arc-discharge-like carbon nanotubes.

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Section: Plasma Treatment Of Large-area Carpets Of Ultra-long Mwcntsmentioning

confidence: 99%

Ultra-stiff large-area carpets of carbon nanotubes

et al. 2016

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Hierarchical Self‐Assembly of Water‐Soluble Fullerene Derivatives into Supramolecular Hydrogels

Rašović,

Piacenti,

Contera

et al. 2024

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Controlling the self‐assembly of nanoparticle building blocks into macroscale soft matter structures is an open question and of fundamental importance to fields as diverse as nanomedicine and next‐generation energy storage. Within the vast library of nanoparticles, the fullerenes—a family of quasi‐spherical carbon allotropes—are not explored beyond the most common, C60. Herein, a facile one‐pot method is demonstrated for functionalizing fullerenes of different sizes (C60, C70, C84, and C90–92), yielding derivatives that self‐assemble in aqueous solution into supramolecular hydrogels with distinct hierarchical structures. It is shown that the mechanical properties of these resultant structures vary drastically depending on the starting material. This work opens new avenues in the search for control of macroscale soft matter structures through tuning of nanoscale building blocks.

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