نتایج جستجو برای: graphite oxides

تعداد نتایج: 36013  

2009
Todd Schumann Sefaattin Tongay Arthur F. Hebard

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...

2005
Yuanbo Zhang Joshua P. Small William V. Pontius Philip Kim

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...

2017
Yusuke Arai Hiroto Obata Meri Watanabe Mari Miyakoshi Satoru Inoda Shinji Makino

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...

Journal: :Chemical communications 2014
Jeong-Min Seo Jong-Beom Baek

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...

Journal: :Journal of Sustainable Metallurgy 2022

Abstract The increased demand for Li-ion batteries has prompted the scientific community to improve recycling routes in order reuse valuable materials batteries. After their end-of-life, are collected, discharged, and mechanically disintegrated, generating plastic metallic streams that recycled directly; this leaves behind a small particle size fraction known as black mass (BM). BM is composed ...

Journal: :Chemical communications 2015
Yubao Zhao Arumugam Manthiram

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.

2000
J. Daures A. Ostrowsky P. Gross

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. ...

Journal: :Journal of environmental quality 2013
Liangliang Ji Wei Chen Zhaoyi Xu Shourong Zheng Dongqiang Zhu

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...

2010
Adila Rani

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...

Journal: :Soft matter 2015
Haoming Pang Shouhu Xuan Taixiang Liu Xinglong Gong

In this work we reported a novel graphite doped conductive magnetorheological plastomer (GMRP) with magnetic field dependent electro-conductivity. The conductivity of the GMRPs increased by increasing the content of the graphite particles, while it decreased with the graphite size. When the graphite content reached 15 wt%, the conductivity of GMRPs is approximately 10 000 times higher than the ...

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