Materials Literature
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The regeneration of a commercial activated carbon (AC) was studied using the wet air oxidation (WAO) process in the temperature range 150−180 °C and an oxygen partial pressure of 0.718 MPa. p -Nitrophenol (PNF) was used as the adsorbate. First, the oxidation process of PNF was studied. In the absence of AC, it was ind…
The structures of free-standing zirconium nanowires with 0.6$-$2.8 nm in diameter are systematically studied by using genetic algorithm simulations with a tight-binding many body potential. Several multi-shell growth sequences with cylindrical structures are obtained. These multi-shell structures are composed of coaxi…
We have simulated the tensile testing of cylindrical multi-shell Cu nanowire. Elongated cylindrical multi-shell Cu nanowire was transformed into a pentagonal structure. Pentagonal nanowires are composed of a central atomic strand and pentagonal tubes made of five-times-folded <110>{100} sheets.
In order to understand properties of ultrathin copper nanowires, we have simulated several copper nanowires using classical molecular dynamic simulations. As the temperature increases, copper nanowires were transformed into structures of the lowest surface stresses and surface energy, circular cross-section with {111}…
Carbon nanotubes were solubilized via functionalization with poly(propionylethylenimine- co -ethylenimine). The diimide-activated amidation reaction for the functionalization was found to be significantly improved in both efficiency and yield by sonication under ambient conditions. It was also found that depending on…
This paper describes a simple and convenient approach that allowed for the facial synthesis of silver/silica coaxial nanocables with well-controlled sheath thicknesses in the range of 2−100 nm. The lengths of these nanocables could be up to ∼50 μm. Such nanocables were prepared by directly coating bicrystalline silver…
For the first time, an analysis of all experimental data on the differential cross section for elastic γp scattering at photon energies below 150 MeV is performed in order to determine the electric ( α p ) and magnetic ( β p ) polarizabilities of the proton. A fit to these data with two free parameters α p and β p emb…
Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text R. S. Sokolova and N. A. Pashkova, "Multispectral antireflection coatings for the IR region," J. Opt. Technol. 69, 86- (2002) Export Citation BibTex En…
Raman spectroscopy was used to determine the molecular behaviour of DMSO and DMSO-d6, and to compare it with that of DMSO in DMSO-intercalated kaolinites. For DMSO at 298 K two bands are observed at 2994 and 2913 cm−1 and are assigned to the antisymmetric and symmetric CH stretching modes. At 77 K the degeneracy of th…
In order to produce gathering on the fabric, it is a normal method to tighten the thread sewed on fabric. In this paper a new method is presented for producing gathering on the fabric. A special thread (Acrylic95%, polyurethane5%) shrunk by treating with steam as a sewing thread to sew on the fabric. Then, the sewed f…
This article concerns the catalysis of polycondensations and polyadditions its scope is limited to the use of metal derivatives and enzymes. Palladium, nickel, ruthenium and copper derivatives are studied as catalysts of carbon-carbon forming polycondensations when applied to polymeric systems and models side reaction…
The electronic properties of an orthorhombic phase of chromium carbide are calculated by the extended Hückel tight-binding method. We found in this phase similar trends in band structure and total and p–d orbital projected DOS with respect to other crystalline phases calculated previously. The bonding nature is analyz…
Abstract Hydrogenated castor oil was reacted with isophorone diisocyanate under different stoichiometric NCO/OH ratios to obtain polyurethanes. These polyurethanes were subsequently interpenetrated with butyl methacrylate monomer using ethylene glycol dimethacrylate as a crosslinker by radical polymerization using ben…
Abstract Transcrystallization of isotactic polypropylene (i‐PP) on the surface of polyte‐trafluroethylene (PTFE) fibers was investigated. Using the single‐fiber pull‐out test, the effect of the transcrystalline layers (TCLs) on the adhesive fracture energy was studied as well. To induce TCL with different thickness, t…
Ground improvement using stone columns was used for the foundations of an extension of a pump house. Three identical new centrifugal pumps are to be installed in such extension. Each pump weighs about 15.8 tons. The pumps will rest on one rigid footing measuring 4.5 x 12 m. In addition to the static load carrying capa…
The crystal structure, magnetic and electrical properties of the La0.50Ca0.50MnO3—γ (0 ≤ γ ≤ 0.50) reduced manganites have been experimentally investigated. It is found that the samples of the La0.50Ca0.50MnO3—γ system display a number of phase transitions in the ground state versus γ. The antiferromagnetic state of γ…
Removal of Cu contaminants from Si wafer was carried out using remote hydrogen plasma (RHP) and UV/O 3 cleaning techniques. The concentration of Cu impurities on the wafer surface was monitored by TXRF (total reflection X-ray fluorescence) and XPS (X-ray photoelectron spectroscopy). Our results show that Cu impurities…
The gel-like films obtained from the homoassociation of diprotonated meso-tetrakis(4-sulfonatophenyl)porphyrin show structural changes depending on their water content, which is determined by the affinity for water of the ionic species segregated from the homoassociation process. These materials, in which NaCl or H 2…
Abstract (η4-1,5-Cyclooctadienyl)rhodium(I) complex with a bidentate N21, N22-bridged porphyrin ligand was prepared. The η4-1,5-cyclooctadiene ligand was easily replaced by carbon monoxide to give the corresponding (dicarbonyl)rhodium(I) porphyrin. The structures of these two complexes were proven by X-ray crystallogr…
Abstract Perylene nanoparticles with different sizes were prepared by reprecipitation method. It is found that the nanoparticles show size‐dependent optical property. Electron diffraction patterns indicate that all the nanoparticles of different sizes are in crystalline state. The rapid growth of the nanoparticles dur…