Graphene properties mechanical resistance

The graphene based FET is of great interest due to its intrinsic electro-mechanical properties [185]. Its physical-mechanical resistance makes it suitable for device manufacture. Graphene FET devices (see Fig. 37) have been made by standardized... 

Nowadays, materials which are of great interest are the carbon nanotubes (CNT) and graphene, which were invented the first time in (1962) and present new properties which can be applied in catalysis [4]. They present high chemical resistivity and are resistant to oxidation and to temperatures. CNT presents electric transport like metals, semiconductors, or superconductors, besides mechanical resistance and flexibility, which can be applied in sensors, polymers, ceramics, and of course catalysis, in particular for hydrogen storage and fuel cells [5]. 

Various tools, like the techniques described in this chapter, make use of macro properties to simulate the effective properties of composite structures. At some scales, those tools will normally give sufficient accuracy to determine effective properties, thanks to the nature of the simulated property at that scale. As seen in the previous section, at the nano-scale, some properties might need the use of quantum mechanics to predict the properties of a composite material as some components show properties such as current transport that are better described by such theories (Lee, 2000 Shunin and Schwartz, 1997), for example, it is well known that graphene may develop a resistivity of 10 2 cm (derived from early experiments on electron mobility graphite), but its manufacturing process as well as impurities cause different macroscopic electrical properties. 

Glassy carbon electrodes are currently very popular due to their particular mechanical and electrical properties, moreover, their wide potential window, chemical inertness and solvent resistance, and reproducible performanee and low eosts make such material very attractive [2, 5, 6, 9, 16, 26, 33]. This material is obtained mainly by a slow and eontrolled carbonization process of phenol-formaldehyde resins is over 300-1200°C in an inert atmosphere [26], reaching sheets of graphene, whieh, in bulk, presents high density and small pore size. 

Yang J, Bai L, Feng G, Yang X, Lv M, Zhang C, et al. Thermal reduced graphene based poly(ethylene vinyl alcohol) nanocomposites enhanced mechanical properties, gas barrier, water resistance, and thermal stability. Ind Eng Chem Res 2013 52(47) 16745-54. 

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