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Toyoda M.,Oita University | Ohuchi Y.,Oita University | Wada T.,High Performance Plastics Company | Kinumoto T.,Oita University | Tsumura T.,Oita University
Journal of Physics and Chemistry of Solids | Year: 2012

The formation of new acceptor-type graphite intercalation compounds (GICs) by traditional methods require a high oxidation potential, rendering the methods unsuitable for a number of compounds. Thus, we have synthesized novel acceptor-type GICs through an electrochemical method. Sodium dimethyldithiocarbamate (NaMDC) and sodium diethyldithiocarbamate (NaEDC) were selected as electrolytes for electrochemical processing in this study. Constant current electrolysis was applied for the synthesis of these acceptor-GICs. An exfoliated graphite sheet was used as the working electrode and a platinum plate in a three electrode cell was used as the counter electrode. Compounds synthesized in this way were identified using X-ray diffraction, enabling crystal structure determination. It appears that the intercalated graphite sheets exhibit a classical stacking in two layers such that there are regularly alternating electropositive and electronegative planes along the c-axis. It is shown that MDC and EDC-GICs were successfully synthesized through this electrochemical method. © 2012 ElsevierLtd.Allrightsreserved. Source

Sun R.-D.,High Performance Plastics Company | Tsuji T.,The University of Shimane
Applied Surface Science | Year: 2015

In this paper, we report on the synthesis of antimony sulfide (Sb2S3) semiconductor nanoparticles by pulsed laser ablation in liquid without using any surfactants or capping agents. Different results were obtained in water and organic solvents. In the case of water, Sb2S3 nanoparticles with chemical compositions of stoichiometry were successfully prepared when laser irradiation was performed under the condition with the dissolved oxygen removed by argon gas bubbling. It was shown that thus-obtained Sb2S3 nanoparticles exhibit features of not only low-temperature crystallization but also low-temperature melting at a temperature as low as 200 °C. Nanoparticle-coated Sb2S3 thin films were found to show good visible light absorption and satisfying semiconductor properties (i.e., carrier mobility and density), which are essential for photovoltaic application. On the other hand, in the case of organic solvents (e.g., acetone, ethanol), such unexpected byproducts as CS2, CO and CH4 were detected from the reaction system by GC-MS analysis, which suggests that both Sb2S3 and organic solvents were partially decomposed during laser irradiation. The possible mechanism will be discussed. © 2015 Elsevier B.V. All rights reserved. Source

High Performance Plastics Inc. and Uniroyal Technology Corporation | Date: 2001-06-05

thermoplastic sheet material for use in the manufacture of orthopedic splints.

High Performance Plastics Inc. | Date: 2000-02-03

connection with Transom Entry Doors, Cabin Entry Systems, Cockpit Doors, Deck Hatches, Mirrored Doors, Shower Enclosures, Interior Doors, Rails and Trims, Specialty Hardware Items, Windshields and Windscreens, Countertops, Skylights for Boats.

Wada T.,Oita University | Wada T.,High Performance Plastics Company | Yasutake T.,Oita University | Nakasuga A.,High Performance Plastics Company | And 3 more authors.
Journal of Nanomaterials | Year: 2014

Layered graphene was prepared via the hydroxylation of potassium-graphite intercalation compound (KC8) produced from exfoliated graphite flake powder. When a small amount of water was dropped onto the KC8 in an oxygen-free atmosphere, the stage structure of the intercalation compounds was broken, and agglomerated graphene was obtained. Sonication of this agglomerated graphene in buffered water containing sodium dodecyl sulfate followed by rinsing with hot water yielded gray samples. Using scanning electron microscopy, X-ray diffraction analysis, and Raman spectroscopy, the gray samples were determined to be composed of a few layers of graphene with an area of 20-100 μm2 and thickness of 1.7 nm. They were thinner than those obtained when starting with natural graphite. © 2014 Takuya Wada et al. Source

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