Materials Literature
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Electrically-fused quartz glass, flame-fused quartz glass and plasma-fused quartz glass as well as synthetic fused silica samples were irradiated stepwise with a high energy Xe barrier discharge excimer lamp at 172 nm. VUV spectra were measured before and after every irradiation step. The results show that the VUV tra…
The addition of hydrogen atoms to models or experimental structures of proteins that contain only non-hydrogen atoms is a common step in crystallographic structure refinement, in theoretical studies of proteins, and in protein structure prediction. Accurate prediction of the hydrogen positions is essential, since they…
A new processing route for manufacturing partially interconnected open‐cell, microcellular mullite ceramics has been developed. The strategy adopted for making microcellular mullite ceramics entailed the following steps: (i) fabricating a formed body from combining polysiloxane, Al 2 O 3 (a reactive filler), polymer m…
We show that the phonon coupling to the electronic system in individual metallic single-walled carbon nanotubes is not due to coupling to low-energy plasmons. The evidence stems from the measured Raman-Stokes G-mode, which for metallic and semiconducting tubes could be fitted well by the superposition of only two Lore…
Structural phase diagrams of ${\mathrm{Gd}}_{5}{\mathrm{Ge}}_{4}$ have been constructed during heating of a zero magnetic-field-cooled sample and during cooling in various constant magnetic fields using temperature $(5--50\phantom{\rule{0.3em}{0ex}}\mathrm{K})$ and magnetic field $(0--3.5\phantom{\rule{0.3em}{0ex}}\ma…
The single crystal NiAl 2 O 4 was prepared by a solid‐state reaction. The change of its cation distribution with temperature was calculated by a modified thermodynamic equation by including a new parameter δ, which is a characteristic of nonconfiguration entropy. The calculated results showed that the degree of invers…
Analyses on phase transformation and stress in the carbon nanotube (CNT)/BaTiO 3 composites were performed in this paper. The hexagonal phase was found to be stabilized at room temperature after adding CNTs, and could be attributed to the high compressive stress existing in the BaTiO 3 grain boundary and CNT/BaTiO 3 i…
Elaboration by spray pyrolysis and characterization in the VUV range of phosphor particles with spherical shape and micronic size, Joffin, Nicolas, Caillier, Bruno, Dexpert-Ghys, Jeannette, Verelst, Marc, Baret, Guy, Garcia, Alain, Guillot, Philippe, Galy, Jacques, Mauricot, Robert, Schamm, Sylvie
Local automorphisms in infinite graphs are defined as those automorphisms for which the distance (in the graph-theoretical sense) between any vertex and its image possesses an upper bound. Abelian subgroups of direction-preserving local automorphisms without fixed point, so-called shift groups, are used to determine t…
Addition of fructose has been shown to reduce the viscosity of aqueous suspensions of nanometric alumina powders. Highly concentrated and flowable aqueous nanometric alumina suspensions were achieved by fructose addition. Oxygen‐17 nuclear magnetic resonance spectroscopy was used to investigate the relaxation time and…
Photoluminescence (PL) in Er-doped amorphous silicon oxycarbide (a-SiCxOy:Er) thin films, synthesized via thermal chemical vapor deposition, was investigated for carbon and oxygen concentrations in the range of 0–1.63. Intense room-temperature PL was observed at 1540 nm, with the PL intensity being dependent on the ca…
The effects of Mn delta-doping on the magnetic properties of (Ga1−xMnx)N thin films grown on GaN buffer layers by molecular-beam epitaxy were studied. The magnetization curve as a function of the magnetic field as 5K indicated that ferromagnetisms existed in the Mn delta-doped (Ga1−xMnx)N and (Ga1−xMnx)N thin films an…
A new low‐toxicity gelcasting system with a 2‐hydroxyethyl methacrylate (HEMA) monomer was applied for casting of alumina ceramics. Polyvinyl pyrrolidone (PVP) was adopted for modifying the homogeneity of the PHEMA (poly‐HEMA) gel. The rheological properties of alumina suspension in the HEMA–PVP premix solution were s…
Helicobacter hepaticus, a causative agent of chronic hepatitis and hepatocellular carcinoma in mice, expresses a nickel-containing hydrogen-oxidizing hydrogenase enzyme. Growth of a hyaB gene-targeted mutant was unaffected by the presence of hydrogen, unlike the wild-type strain, which showed an enhanced growth rate w…
The preparation and dielectric properties of potassium niobate tantalate (KTN) have been investigated with the aim of exploring the material's potential for ferroelectric tunable applications. The samples were prepared both by conventional sintering in air and by uniaxial hot pressing. A relative average density great…
Channeled yttria‐stabilized cubic phase of the zirconia (Ni–YSZ) cermets are produced by reduction of laser‐assisted directionally solidified NiO–YSZ lamellar eutectics. The material is formed by ∼400 nm wide alternating lamellae of 40% porous Ni and YSZ, which serve as parallel channels for gas flow and electronic tr…
Thin films of ZnO agave-like nanowires were prepared on amorphous carbon thin layers on silicon substrates using thermal chemical vapour transport and condensation without any metal catalysts. The unusual superhydrophobicity of the fabricated surface was measured; the water contact angle reaches 151.1°. On the basis o…
Crystallization of three new organic/inorganic hybrid solids ( 1 − 3 ) based on octamolybdate under self-assembly conditions has demonstrated the structure-directing role of three hydrogen-bonded organic dimers (supramolecular synthons) in the construction of multidimensional networks. In acidified aqueous molybdate s…
Structural, magnetic, and resistive properties of the chromium substituted ${\mathrm{SrRu}}_{1\ensuremath{-}x}{\mathrm{Cr}}_{x}{\mathrm{O}}_{3}$ perovskites with increased ferromagnetic transition temperature from 163 to 188 K were studied for polycrystalline samples synthesized in air and at high pressure. The Cr sol…
We explore the generality of nanoparticle haloing as a novel colloidal stabilization mechanism in binary mixtures of silica microspheres and polystyrene nanoparticles. By selectively tuning their electrostatic interactions, both the initial microsphere stability and the role of nanoparticle additions are varied. Adsor…