Cast iron presents graphite particles of different shapes that directly affect its thermo-mechanical properties [1]. Fracture toughness and ductility depend strongly on the shape of the graphite particles. Particles with nodular shapes improve these properties while more elongated particles or with irregular contours are detrimental due to stress concentration points [2]. Thus, cast iron is cla...

The unique properties of single-walled carbon nanotubes are a direct result of their distinctive structure, which is composed of C-C bonds more closely related to those in graphite than to those in diamond. That is, while diamond has a coordination number of four with sp hybridization, graphite involves three-coordinated carbons, in which three electrons are in sp hybridization and one is deloc...

Todd Schumann, Sefaattin Tongay, Arthur F. Hebard Department of Physics, University of Florida, Gainesville FL 32611 This article demonstrates the formation of Schottky diodes on silicon (Si), gallium arsenide (GaAs), and 4H-silicon carbide (4H-SiC) using the semimetal graphite. The forward bias characteristics follow thermionic emission theory, and the extracted Schottky barrier heights closel...

We have developed a unique micromechanical method to extract extremely thin graphite samples. Graphite crystallites with thicknesses ranging from 10 to 100 nm and lateral size ,2 mm are extracted from bulk. Mesoscopic graphite devices are fabricated from these samples for electric field-dependent conductance measurements. Strong conductance modulation as a function of gate voltage is observed i...

We present three cases of intracorneal pencil graphite particles following penetrating ocular injury. Slit lamp examination revealed pencil graphite particles in the corneal stroma in all cases. Although we did not remove the particles, no complications occurred during the follow-up period. We assumed that removal of the pencil graphite particles was unnecessary, and it was avoided to prevent t...

A solvent-free Diels-Alder reaction was carried out by heating a mixture of graphite and a typical dienophile, maleic anhydride (MA) or maleimide (MI), in a sealed glass ampoule of argon. The functionalization of graphite with dienophiles was confirmed by various characterization techniques, suggesting the efficient functionalization and delamination of graphite into a few layers of graphitic n...

Amorphous Sb2S3 embedded in a conductive graphite matrix is designed for sodium-ion batteries. Owing to the amorphous structure of the active phase and the conductive graphite matrix, the Sb2S3-graphite electrode exhibits a high initial Coulomblic efficiency, a high rate capacity, and stable cycle performance in sodium-ion batteries.

At BNM-LNHB, the references in terms of absorbed dose to water are based on graphite calorimeter measurements. In the cobalt-60 beam, measurements were performed directly with the graphite calorimeter in a graphite phantom. Absorbed dose to water in a water phantom was then determined using a transfer method by means of relative measurements made with ionisation chambers and Fricke dosimeters. ...

Graphenes are an emerging class of carbon nanomaterials whose adsorption properties toward organic compounds have not been well understood. In the present study, graphene nanosheets were prepared by reoxidation and abrupt heating of graphite oxide, which was prepared by sequential chemical oxidation of commercial nonporous graphite powder. Adsorption properties of three aromatic compounds (naph...

Carbon materials such as graphite and graphene exhibit high electrical conductivity. We examined the electrical conductivity of synthetic and natural graphene powders after the chemical reduction of synthetic and natural graphite oxide from synthetic and natural graphite. The trend of electrical conductivity of both graphene (synthetic and natural) was compared with different graphite materials...