Solid graphene

The quantity x is a dimensionless quantity which is conventionally restricted to a range of —-ir < x < tt, a central Brillouin zone. For the case yj = 0 (i.e., S a pure translation), x corresponds to a normalized quasimomentum for a system with one-dimensional translational periodicity (i.e., x s kh, where k is the traditional wavevector from Bloch s theorem in solid-state band-structure theory). In the previous analysis of helical symmetry, with H the lattice vector in the graphene sheet defining the helical symmetry generator, X in the graphene model corresponds similarly to the product x = k-H where k is the two-dimensional quasimomentum vector of graphene. 

Fig. 5. Band gap as a function of nanotube radius calculated using empirical tight-binding Hamiltonian. Solid line gives estimate using Taylor expansion of graphene sheet results in eqn. (7).

For more efficient utilization of MOFs sorbents, several hybrid systems based on MOFs with other solid sorbents have been investigated in the literature. The objective of having hybrid materials is to utilize the synergism between the two sorbents and therefore ultimately improve the overall performance in C02 separation. Moreover, sorbents such as activated carbons, graphenes, and CNTs provide the added feature of high surface area and easily functionalized sites which contribute to the tuning of the final properties of the composite... 

K.l. Bolotin, K.J. Sikes, Z. Jiang, M. Klima, G. Fudenberg, J. Hone, et al., Ultrahigh electron mobility in suspended graphene, Solid State Communications, 146 (2008) 351-355. 

B. Mortazavi, S. Ahzi, Molecular dynamics study on the thermal conductivity and mechanical properties of boron doped graphene., Solid State Communications, vol. 152, pp. 1503-1507, 2012. 

Fig. 5.20 SEM images of ZnO nanowires grown on graphene via CVD from a solid Zn precursor at increasing growth times from (a) 5 min to (b) 10 min and (c) 15 min, insets show higher magnification SEM images of the same surfaces. Reprinted with permission from [243], (2012) Elsevier.

Wang, L., et al., A novel hydrogen peroxide sensor based on Ag nanoparticles etectrodeposited on chitosan-graphene oxide/cysteamine-modified gold electrode. Journal of Solid State Electrochemistry, 2012.16(4) p. 1693-1700. 

Iwase, A. Ng, Y. H. Ishiguro, Y. Kudo, A. Amal, R., Reduced Graphene Oxide as a Solid-State Electron Mediator in Z-Scheme Photocatalytic Water Splitting under Visible Light./. 

Carbon nanotubes, as graphene and graphite, are highly ordered carbon phases. However, a separate line can be drawn for historical development of disordered carbon phases among them is an amorphous carbon (am-C). In it, strong bonding between carbons did not allow for completely chaotic distribution of carbon atoms in solid-state phase. Instead, amorphous carbon exhibits random distribution of three possible coordinations of carbon atoms in a planar sp, tetrahedral sp and... 

The main difference between carbon nanotubes and high surface area graphite is the curvature of the graphene sheets and the cavity inside the tube. In microporous solids with capillaries which have a width not exceeding a few molecular diameters, the potential fields from opposite walls will overlap so that the attractive force which acts upon adsorbate molecules will be increased in comparison with that on a flat carbon surface [16]. This phenomenon is the main motivation for the investigation of the interaction of hydrogen with carbon nanotubes (Figure 5.14). 

Lemme MC (2009) Current status of graphene transistors. Solid State Phenomena 156—158 499-509... 

Kang YS, Seelaboyina R, Lahiri I et al (2010) Synthesis of graphene and its applications a review. Crit Rev Solid State Mater Sci 35 52-71... 

Shukla A, Kumar R, Mazher J et al (2009) Graphene made easy high quality, large-area samples. Solid State Commun 149 718-721... 

Sakhaeepour A (2009) Elastic properties of single-layered graphene sheet. Solid State Commun 149 91-95... 

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