Nanocarbon

Huczko, A. et al. (2005) Pulmonary toxicity of 1-D nanocarbon materials. Fullerenes, Nanotubes, and Carbon Nanostructures, 13 (2), 141—145. Grubek-Jaworska, H. et al. (2006) Preliminary results on the pathogenic effects of intratracheal exposure to onedimensional nanocarbons. Carbon,... 

Li et al. [Ill] reported the simultaneous production of hydrogen and nanocarbon by decomposition of methane on Ni and Ni-Cu catalysts. The authors demonstrated the production of hydrogen with a purity of 80 vol% over 10 h simultaneously, 180 g of nanotubes... 

Li, Y. et al., Simultaneous production of hydrogen and nanocarbon from decomposition of methane on nickel-based catalyst, Energy Fuel, 14,1188, 2000. 

Nalidixic acid, 3 29 21 104, 123, 215 year of disclosure or market introduction, 3 6t N-alkylation reactions of aniline, 2 785-786 microwaves in, 16 557-558 Naltrexone drug delivery, 9 65—66 Nameplate capacities, 23 547-548 Nametre viscometer, 21 739 NAND arrays, 22 258 Nanoaluminum composites, 10 19, 20 Nanoassemblies, shell and core cross-linked, 20 489-490 Nanocar, 24 62 Nanocarbon materials, 1 718-722 Nanoceramics, 1 705-708 Nanoclays, 11 313-314... 

Physisorption (i.e., adsorption of hydrogen) of molecular hydrogen by weak van der Waals forces to the inner surface of a highly porous material. Adsorption has been studied on various nanomaterials, e.g., nanocarbons, metal organic frameworks and polymers. 

Research Center for Exotic Nanocarbons (JST) Shinshu University Wakasato, Nagano, Japan e-mail rcruzsilva shinshu-u.ac.jp Chapter 4... 

This section provides brief insights on some of the most important characterization techniques used for CNTs and other nanocarbons in addition to microscopy-related (i.e. SEM, TEM, AFM, STM) and diffraction (i.e. X-ray, electron) techniques. 

Raman spectroscopy is one of the most powerful techniques for the characterization of nanocarbons. It is also a convenient technique because it involves almost no sample preparation and leaves the material unharmed. There are four characteristic bands for CNTs The band at 200 cm-1 is called radial breathing mode (RBM). It depends on the curvature and can be used to calculate the diameter of SWCNTs [61]. The relatively broad D-band at 1340 cm-1 is assigned to sp2-related defects and disorder in the graphitic structure of the material. The tangential C-C stretching mode is located at -1560 cm 1 (G-band). The second order mode of the D-band can be observed (G -band,... 

One synthesis approach that does not rely on CNT formation from the gas phase is molten salt synthesis. The reactor consists of a vertically oriented quartz tube that contains two graphite electrodes (i.e. anode is also the crucible) and is filled with ionic salts (e.g. LiCl or LiBr). An external furnace keeps the temperature at around 600 °C, which leads to the melting of the salt. Upon applying an electric field the ions penetrate and exfoliate the graphite cathode, producing graphene-type sheets that wrap up into CNTs on the cathode surface. Subsequently, the reactor is allowed to cool down, washed with water, and nanocarbon materials are extracted with toluene [83]. This process typically yields 20-30 % MWCNTs of low purity. 

In this section, different nanocarbons and their chemical and physical properties are discussed (for more details see Chapters 1 and 2). Furthermore, the types of defects that can be embedded within these carbon nanostructures are explained, as well as their resulting chemical and physical properties. 

Nanocarbon structures such as fullerenes, carbon nanotubes and graphene, are characterized by their weak interphase interaction with host matrices (polymer, ceramic, metals) when fabricating composites [99,100]. In addition to their characteristic high surface area and high chemical inertness, this fact turns these carbon nanostructures into materials that are very difficult to disperse in a given matrix. However, uniform dispersion and improved nanotube/matrix interactions are necessary to increase the mechanical, physical and chemical properties as well as biocompatibility of the composites [101,102]. 

Incorporation of nanocarbons into polymer composites and hybrids... 

Tab. 4.3 Percolation threshold and conductivity for electrical transport using different types of nanocarbons in polymer composites.

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