Materials Literature
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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…
This paper reports on the results of experimental investigations into the thermal conductivity of GaS and GaSe layered semiconductor crystals in directions parallel and perpendicular to the crystal layers in the temperature range 5–300 K. Specific features of the thermal conductivity of these crystals are analyzed.
A differentially pumped pressure cell has been developed to enable in situ low-energy ion scattering (LEIS) analysis of catalysts during chemical reactions. The cell is fully compatible with an electrostatic analyzer and is, therefore, very well suited to study rough, highly dispersed catalysts. The pressure cell is a…
We report the measurements of charge collection efficiency for nuclear particle detectors made from electronic-grade chemical vapor deposition (CVD) diamond samples with thicknesses of 20 and 150 /spl mu/m fabricated at CEA/LETI. Although it is well established that the transport properties of CVD diamond, and more sp…
To improve the production of oligo-1,6-glucosidase from the obligately thermophilic Bacillus thermoglucosidasius KP1006 in Escherichia coli, the combined expression of oligo-1,6-glucosidase with various chaperone proteins of Hsp (heat-shock protein) 60 team proteins (GroES and GroEL) or Hsp70 team proteins (GrpE, DnaK…