High resolution electron microscopy requires that the specimen supports be smooth. With this in mind a procedure was developed for cleaving single graphite crystals into thin flakes suitable as specimen supports. Fernfindez-Morfin (1) was the first to use graphite and mica crystals for specimen supports. He as well as Sprague (2) obtained the thin sheets of mica and graphite required through su...

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...

Abstract Elemental composition of non-irradiated nuclear grade graphite was determined by Prompt Gamma Activation Analysis (PGAA) to quantitively assess some neutron activation precursors. The knowledge these data is paramount for an accurate radiological characterization the material before decommissioning graphite-moderated reactors. Bulk results most nuclides were consistent with benchmark 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...