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Based on first-principles calculations and Wannier tight-binding model, a three-dimensional (3D) carbon structure, named mC16, composed of interpenetrating graphene, is shown to be a topological nodal-line semimetal. The band structure calculations reveal that mC16 exhibits some exceptional properties. These include the Dirac band and band inversion around the Fermi level, and four nodal-lines in...
Graphene is moving beyond the realm of simple electronic devices toward areas such as advanced bio-chemical sensing. The infrared (IR) response of graphene, characterized by collective long-lived charge-carrier oscillations, could be applied in IR-absorption spectroscopy, typically used for bio-chemical analysis. However, direct light absorption by propagating plasmons in graphene is forbidden due...
Motivated by the unique geometry and novel properties of penta-graphene proposed recently as a new carbon allotrope consisting of pure pentagons [Zhang et al. Proc. Natl. Acad. Sci. 2015, 112, 2372], we systematically investigated its phonon transport properties by solving exactly the linearized phonon Boltzmann transport equation combined with first principles calculations. The intrinsic lattice...
In present work, we demonstrate a synchronous carbonization and graphitization process to produce nanoporous graphitic carbon materials, using glucose as carbon source, and Ni-Dimethylglyoxime-complex, Ni(dmgH)2, as graphitization agent. The carbon samples exhibit good graphitic feature at the low carbonization temperature of 800 °C, with the BET surface area of 584 m2 g−1, and pore volume of 0.76 cm...
Montmorillonite-modified carbon foams with a closed-pore structure were prepared by compressive molding of phenolic resin, phenolic hollow microspheres and montmorillonite, followed by thermosetting and carbonization at 800°C under Ar flow. The effects of the montmorillonite content on the microstructure, compressive strength and thermal conductivity of the modified foams were investigated. Results...
Three-dimensional flower-like and hierarchical porous carbon material (FHPC) has been fabricated through a simple and efficient carbonization method followed by chemical activation with flower-like ZnO as template and pitch as carbon precursor. The hierarchical porous structure is composed of numerous micropores and well-defined mesopores in the interconnected macroporous walls. The FHPC electrode...
Two-dimensional mesoporous carbon sheet-like framework (MCSF) material has been prepared using mesoporous SiO 2 nanosheet as template and coal tar pitch as carbon precursor. MCSF sheets consisting of numerous mesopores have a specific surface area of 582.7m 2 g −1 . As a result, the MCSF electrode possesses a maximum specific capacitance of 264Fg −1 at 5mVs −1 ...
A carbon material consisting of hollow carbon spheres anchored on the surface of carbon nanotubes (CNT–HCS) has been synthesized by an easy chemical vapor deposition process using a CNT–MnO 2 hybrid as template. An electrode made of this material exhibits a maximum specific capacitance of 201.5Fg −1 at 0.5Ag −1 and excellent rate performance (69% retention ratio at 20Ag ...
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