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  • Nanotoxicology: Characterization, Dosing and Health Effects
    By contrast, carbon fibers are strands of graphite sheets that are layered, giving the overall fiber shape. The way that the hexagons tile gives rise to different structures, called the chirality of the tube .
  • Focus on carbon nanotubes : Nature News
    … means to realize a speculative project proposed by the science fiction writer, Arthur C. Clarke: a space platform above the planet's atmosphere tethered to the ground by strong fibres and accessible by elevator … … so researchers wondered whether carbon nanotubes (whose atomic structure … The rows of carbon hexagons wind around the walls in spirals, and calculations suggested that the conductivity of the tubes depends on the 'pitch' of this helical structure.
  • Carbon nanotubes (CNTs)-based electroanalysis
    Although in 1978 Wiles and Abrahamson [1] observed a thick mat of fine fibres of graphite anodes with diameters ranging from … … with a hollow core, the discovery of carbon nanotubes was attributed to … … sisting of needle-like tubes , each needle comprising coaxial … On each tube the carbon-atom hexagons are arranged in a helical fashion about the needle axis …
  • Micromanufacturing and Nanotechnology
    But if the addition of carbon atoms is not according to the discussed order, the C2 dimer absorption may result into capping the tube with pentagon, while if the carbon addition involves C3 trimer, hexagon could merely be added. … mechanism of the nanotube has been related to the corresponding vapour grown carbon fibre mechanism (Ebbesen 1997).
  • ZIMR4906P325
    Endo and co-workers also observed that by breaking vapour grown carbon fibres (VGCFs) in liquid 39 Molecular models of a C nanotube­Haeckelite junction (note that Haeckelite part is composed only of pentagons and heptagons) and b Haeckelite tube with pentagons, heptagons and hexagons .
  • Carbon-Based Nanomaterials From a Historical Perspective
    In 1992, they published an important and highly cited paper predicting that single-wall carbon fibers , now called single-wall car- bon nanotubes (SWNTs) [40], could in fact be … … metallic, depending on the orientation of their hexagons with respect to the … … and conduction bands in momentum space, as shown in Fig. 5(c), a metallic tube would result.
  • Characterization of the uncertainties in the constitutive behavior of carbon nanotube/cement composites
    Furthermore, SOLID65 allows rebars, fibers or both to be characterized as smeared reinforcement by defining the volume … It is worth noting that, instead of solid tubes , CNTs are actually like cylindrical graphene sheets being made of carbon atoms bonded in hexagon configurations.
  • ROMER Rolls Out New ScanShark Inspection And Reverse Engineering Solution
    The advanced carbon - fiber arm tubes are both dimensionally stable and lightweight for ergonomic handling. SOURCE: ROMER Inc. and Hexagon Metrology .
  • Springer Handbook of Nanotechnology
    Large circles are PAN- based carbon fibers, which include the fiber with the highest tensile strength available on the market (T1000 from Torayca); Triangles are pitch-based carbon fibers , which include the fiber with the high- est tensile modulus on the market … Unlike fullerenes, the ratio of weak sites (C−C bonds involved in hetero- cycles) to strong sites (C−C bonds between regular hexagons ) is only deviates slightly from 0 for ideal tubes .
  • Springer Handbook of Nanotechnology
    Large circles are PAN-based carbon fibers, which include the highest tensile strength fiber available on the market (T1000 from Torayca); Triangles are pitch-based carbon fibers , which include the highest tensile modulus fiber on the market (K1100 from Amoco Compared to fullerenes, the ratio of “weak” sites (C−C bonds involved in heterocycles) over strong sites (C−C bonds between regular hexagons ) is only slightly different from 0 for ideally perfect tubes (as opposed to 1 in C60 fullerenes – C60 molecules have …