Advances in carbon nanomaterials : science and applications by Nikos Tagmatarchis

By Nikos Tagmatarchis

This e-book covers the nomenclature and modeling of carbon nanomaterials, contains examples of surfaces and skinny movies of fullerenes, and examines the morphology and constitution of carbon nanotubes and the characterization of peapod fabrics because of transmission electron microscopy. It additionally provides electro-optical houses and self-assembly and enrichment in carbon nanotubes, through thoughts for the chemical functionalization of carbon nanohorns and endohedral metallofullerenes. eventually, the purposes of endohedral metallofullerenes in quantum computing and of functionalized carbon nanotubes in medication finish this interesting review of the field.

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The thought experiment consists of removing a wedge of material from graphene and reconnecting the dangling bonds, as shown in Fig. 11 (left), forming a cone. Due to the atomistic structure of graphene, this results in the formation of pentagons (marked in gray in Fig. 10). As the number of pentagons must be discrete (1 to 5), there is a discrete number of disclinations that can be produced, and therefore only five possible angles for the nanocone (see Fig. 11). The angle is easily related to the number of pentagons.

222 Finally by controlling CVD synthesis conditions, Trasobares et al. were able to produce MWCNTs with multi-layered graphitic sheets attached to their walls much like thorns on a rose stem223 (referred to by the authors as “nanowings”, see Fig. b). These were proposed as interesting candidates for composite reinforcement due to assumed enhanced pull-out energies. 26. jpg (b) “nanowings,” segments of multi-layered graphite fused to nanotube walls. Susana Trasobares, Private Communication (2011).

01-Tagmatarchis-ch01 March 28, 2012 10:3 PSP Book - 9in x 6in 01-Tagmatarchis-ch01 “Necklace” Tubes/Nanobells Finally, there are also many theoretical studies examining the possibility that helical nanotubes are constructed, not from a periodic hexagonal array of carbon, but from layered carbon consisting of pentagons, heptagons, and optionally hexagons. These “Haeckelite” structures and their potential involvement in helical nanotube structure are discussed further below. 3 Applications of Helical Nanotubes Coiled multi-walled tubes have been shown to have strength comparable to SWCNTs131 and have been proposed as a suitable filler for composite reinforcement; in principle, they should be superior to straight nanotubes due to improved anchoring into the embedding matrix and better load transfer.

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