Materials Literature
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Dense AlN–SiC solid solution ceramics with 25–75 mol% AlN were fabricated by spark plasma sintering using hexagonal SiC and AlN powders without additives. The bending strength reaches 800 MPa at room temperature with a fracture toughness of about 5 MPa·m 1/2 . The high bending strength can be retained at high temperat…
Anisotropic etching of silicon in KOH solutions saturated with tertiary-butyl alcohol (tert-butanol) was studied in this paper. The influence of KOH concentration of the solution with tert-butanol on Si(1 0 0) surface roughness and convex corners undercut were examined. It was shown that the largest reduction of conve…
A new, versatile substrate design for surface-enhanced Raman spectroscopy (SERS) is introduced that provides better illumination and collection efficiency than other solid substrates. It uses sheets of 5 nm diameter gold nanoparticles that are draped by drying-mediated self-assembly onto 100 nm thick silicon nitride m…
Abstract Poly(methyl methacrylate) (PMMA)/layered double hydroxides (LDH) nanocomposites were synthesized by in situ bulk polymerization. The LDHs were synthesized by coprecipitation method. Eight LDHs having different compositions were produced, varying the divalent/trivalent cations (Zn/Al, Mg/Fe), the ratio between…
Abstract Nano‐CaCO 3 was used as nano‐scale filler and poly(1,2‐propylene glycol adipate) (PPA) was used as polymeric plasticizer in flexible poly(vinyl chloride) (PVC) sheets for the partial replacement of di(2‐ethyl hexyl) phthalate (DOP) in this paper. The effect of PPA and nano‐CaCO 3 on restraining DOP migration…
Functionalization of single wall carbon nanotubes (SWCNTs) is desirable to enhance their ability to be incorporated into polymers and enhance their bonding with the matrix. One approach to carbon nanotube functionalization is by oxidation via a strong oxidizing agent or refluxing in strong acids. However, this approac…
Nanocomposite materials were prepared via glycerol plasticized soy protein as the matrix and in situ fabricated silica as thereinforcing phase. The silica nanoparticles were synthesized in the protein environment by sodium silicate as a precursor. The resulting composites were characterized by Fourier transform infrar…
A Ni/Mo2C/SBA-15 catalyst was prepared for carbon dioxide reforming of methane to produce synthesis gas. The catalysts modified by nickel were prepared from ammonium heptamolybdate that was supported with SBA-15 and were carburized in a flow of 20.0 vol% CH4/H2 gas mixture. The catalyst was characterized by N2 adsorpt…
Oxidation of toluene was catalyzed by bare and TiO 2 -covered NiO-Ni(OH) 2 nanoparticles under humid air. For deposition of TiO 2, atomic layer deposition was used. Bare NiO-Ni(OH) 2 showed a significantly high activity for toluene oxidation. When TiO 2 islands were deposited on NiO, formation of CO 2 as a result of t…
Abstract Polylactide (PLA)‐based wood–plastic composites (WPCs) were successfully manufactured by extrusion blending followed by injection molding. The effects of polyhydroxyanoates (PHAs) on the mechanical and thermal properties and the morphologies of the PLA‐based WPCs were investigated with mechanical testing, the…
A methylcyclohexane-toluene-hydrogen system employs methylcyclohexane as a recyclable organic hydride for the on-vehicle production, storage, and utilization of hydrogen gas. The success of the methylcyclohexane-toluene-hydrogen system lies in the success of the dehydrogenation reaction of methylcyclohexane. A highly…
Through vapor pressure measurements, water activities of the glycerol–water solution were first examined under temperatures of 30–85 °C and glycerol concentrations of 0–50 mol %. The water activity is the only determinant of phase-transition point among CaSO 4 ·2H 2 O (DH), α-CaSO 4 ·0.5H 2 O (α-HH), and CaSO 4 (AH) i…
Motivated by the recent discovery of Fe-based superconductors close to an antiferromagnetic insulator in the experimental phase diagram, here the five-orbital Hubbard model (without lattice distortions) is studied using the real-space Hartree-Fock approximation, employing a $10\ifmmode\times\else\texttimes\fi{}10$ Fe…
Periodische mesoporöse Organosiliciumdioxid-Derivate (PMOs) mit einer hohen Dichte an Ru- und Ir-Komplexen auf den Porenwänden wurden durch einen einzigartigen, zwei Schritte umfassenden Prozess erhalten: 1) Synthese der in der Porenwand Phenylpyridin als verbrückende Gruppe enthaltende PMOs und 2) postsynthetische Bi…
We study the sliding friction of poly(vinyl alcohol) (PVA) gel against glass substrate in hyaluronan (HA) aqueous solution with various concentrations and two molecular weights. The frictional stress decreases with increase of concentration of HA at low sliding velocity, and the lowest friction appears in HA 10 c * (…
Abstract Using starting BaTiO 3 powders of various particle sizes, we investigated the densification and dielectric characteristics of BaTiO 3 ceramics sintered at low temperature with the addition of ZnO‐B 2 O 3 ‐SiO 2 (ZBS) glass as sintering aids. Scanning electron microscopy, X‐ray diffraction, Raman spectroscopy,…
By proper assembling and electronic driving of two parallel single nematic liquid crystal cells with planar and vertical alignment of the liquid crystal molecules, respectively, arranged in a double cell, fast switching between bright and dark states, back and forth, is achieved. The switching rise and fall time of th…
Semiconductor nanocrystals placed nearby a metal film significantly change their optical properties. In this work, we examine the change in fluorescence intensity, lifetime, and blinking behavior of individual CdSe/CdS nanorods close to a 9 nm thick amorphous carbon film. Energy transfer between the donor and acceptor…
The optical properties of PbSe/CdSe core/shell quantum dots with core sizes smaller than 4 nm in the 5-300 K range are reported. The photoluminescence spectra show two peaks, which become increasingly separated in energy as the core diameter is reduced below 4 nm. It is shown that these peaks are due to intrinsic exci…
Various electrode reaction rate boundary conditions suitable for mean-field Poisson-Nernst-Planck (PNP) mobile charge frequency response continuum models are defined and incorporated in the resulting Chang-Jaffe (CJ) CJPNP model, the ohmic OHPNP one, and a simplified GPNP one in order to generalize from full to partia…