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We report the efficient productions of single- and few-layered graphene and molybdenum disulphide (MoS2) nanosheets using a surfactant-free, water-assisted liquid-phase exfoliation (LPE) of graphite and MoS2 bulk powders in N-methylpyrrolidinone (NMP). Extensive absorption spectroscopic study and materials characterizations indicate that the addition of water to NMP was not only effective on the exfoliation...
A carpet structure composed of high purity cup-stacked carbon nanotubes (CSCNTs) was synthesized by a catalytic chemical vapor deposition method. In a 15-min growth time, the CSCNT carpet with a height up to ∼300μm and carbon purity above 99.9wt.% was prepared. Transmission electron microscopy observations indicated that the CSCNTs with diameters ranging from 80nm to 230nm consist of truncated conical...
Double-walled carbon nanotubes (DWCNTs) were synthesized by a metal-catalyst-free chemical vapor deposition method using silicon oxide nanoparticles as a catalyst. The diameters and lengths of the DWCNTs are in the ranges of 3–5nm and 1–5μm, respectively. The amount of DWCNTs produced is about 70%, while the remainder is single-walled carbon nanotubes. A heat treatment of the SiO 2 /Si substrate...
Mesocarbon microbeads were molded at 100MPa pressure, and then heat-treated. In order to seek optimum seal effect, the graphite from MCMBs were impregnated with pitch and resins, and then carbonizated at 500°C The resulting graphite from MCMBs/pitch-based carbon/phenolic-based carbon composites were evaluated in terms of physical properties, textures and the seal properties to determine their potential...
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