Materials Literature
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We evaluated the chemical reactivity of wet ozone and polymers by estimating removal of polymers with various chemical structures using wet ozone. The removal rates of polymers that have the carbon-carbon double bond (C-C double bond) in the main chain (novolak resin, cis-1,4-polyisoprene) were the fastest. The remova…
Commercially available specimens of pure molybdenum were immersed in a graphite-filled Ta container and heated at a relatively low temperature of 1373 and 1473 K for 1.2 to 18.0 ks. Changes in the yield and maximum strength were evaluated by a three-point bending test at a temperature between room temperature and liqu…
Mesoporous silica particles were prepared from highly basic sodium silicate solutions, having different silica modulus and SiO2 concentrations, by adding sulphuric acid at different temperatures. Pore structure of prepared silica particles (aggregates) is strongly influenced by processing conditions and easy controlla…
The self-assembly of polymer–peptide conjugates containing a modified amyloid peptide sequence is studied. Lyotropic liquid crystal phases are observed in water, and PEG crystallization is probed.
A kind of porous carbon spheres (PCS) was prepared by the carbonization of poly(vinylidene chloride) synthesized by suspension polymerization. Structure analyses revealed the existence of bumps and holes on the surface of PCS. The PCS, with the pore size between 0.8–1.2 nm, could be used as the support of zinc acetate…
Two scales of roughness are imparted onto silicon surfaces by isotropically patterning micron sized pillars using photolithography followed by an additional nanoparticle coating. Contact angles of the patterned surfaces were observed to increase with the addition of the nanoparticle coating, several of which, exhibite…
For any sonochemical process, the maximum effect depends on a range of conditions and process optimization can lead to a considerable savings in electric power. In this paper, the optimization investigation focuses on the acoustic features of the ultrasonic reactor, such as the transducer impedance and the frequency c…
The purpose of this study is to document new records from Arkansas and to revise and update nomenclature to reflect current taxonomic understanding for previously recorded algae. There are a total of 1387 species: 386 Bacillariophyta (327 Bacillariophyceae, 17 Coscinodiscophyceae, 42 Fragilariophyceae), 337 Cyanoproka…
Two kinds of water clusters, the unique dodecahedral (H2O)14 cage and the truncated cubic (H2O)12 cluster formed from both coordinated and lattice water molecules, are captured in three lanthanide complexes [Ln4(chtc)3(H2O)10]·9H2O (Ln = Tb 1, Yb 2, Dy 3, H4chtc = cyclohexane-1,2,4,5-tetracarboxylic acid). Compound 1…
Two mathematical crystallization models describing structure formations in instability zones are proposed and justified. The first model, based on a phase field system, describes crystallization processes in binary alloys. The second model, based on a modified Biot model of a porous medium and the convective Cahn–Hill…
A model based on solubility parameters is proposed to predict the solubility curves of antihelmintic drugs at several temperatures, including aqueous and non-aqueous mixtures. The solubility of the drugs was measured in ethanol-water and ethanol-ethyl acetate mixtures at 15-35 degrees C (mebendazole) and at 25 degrees…
Abstract The mechanisms of photocarrier transport through a barrier in the surface space-charge region (SCR) of 2D macroporous silicon structures have been studied at photon energies comparable to that of the silicon indirect band-to-band transition. It was found that the photoconductivity relaxation time was determin…
With recommendations from wire manufacturers as a starting point, a series of solder joints were fabricated and characterized to determine the best method for producing repeatable, low‐resistance and high‐mechanical‐strength splices in as‐manufactured, stabilized YBCO coated conductors. From the 2.54 cm long splice jo…
Instrument and methodology is presented for very low energy scanning transmission electron microscopy. The detector system provides simultaneous acquisitions of total reflected and transmitted electron fluxes. Introductory experiments incorporated examination of ultrathin foils of gold, carbon and graphene flakes. Ext…
Three different ZnO nanoplate arrays on Si-wafer were successfully synthesized at 95 °C from ZnO nanoparticles with modified surface by citrate anion. Shape, size, density, and orientation of the resulting nanoplates were dramatically changed by the nucleus seed concentration, which was controlled through different co…
Anode-supported solid oxide fuel cells with a variety of yttria-stabilized zirconia (YSZ) electrolyte thicknesses were fabricated by tape casting and lamination. Preparation of the YSZ electrolyte tapes with various thicknesses was accomplished by using doctor blades with different gaps between the precision machined,…
Undoped ZrP 2 O 7 and 2 mol % Sc-, Y-, and La-doped ZrP 2 O 7 have been synthesized by an aqueous phosphoric acid route and characterized by X-ray diffraction and scanning electron microscopy. The samples were fabricated by conventional and spark plasma sintering (SPS), and the electrical conductivity was examined fro…
The Light Water Reactor Sustainability Program Plan is a collaborative program between the U.S. Department of Energy and the private sector directed at extending the life of the present generation of nuclear power plants to enable operation to at least 80 years. The reactor pressure vessel (RPV) is one of the primary…
Le système composé d’un gel d’agar-agar et d’une microémulsion présente plusieurs qualités pour extraire des matériaux hydrophobes de couches poreuses. Les propriétés rhéologiques de ce système sont adaptées à un usage en restauration et sont stables pendant plusieurs jours. Les gels permettent la solubilisation du ma…
Because of the unique combination of their attractive properties, porous ceramics are considered as candidate materials for several engineering applications. The production of porous ceramics from polysiloxane precursors offers advantages in terms of simple processing methodology, low processing cost, and easy control…