Materials Literature
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Structural, magnetic and ferromagnetic resonance characterization studies have been performed on lay-ered ferromagnetic-ferroelectric oxides that show strong magnetoelectric coupling. The samples contained thick films of ferrites or substituted lanthanum manganites for the ferromagnetic phase and lead zirconate titana…
Multiwalled carbon nanotubes (MWNTs) and ultrahigh molecular weight polyethylene (UHMWPE) composites were prepared by gelation/crystallization from solution. The dried composites of MWNTs−UHMWPE with 15 wt % of MWNTs would be elongated up to more than 100-fold (λ = 100). The electric conductivity was 10 -3 S/cm termed…
The electrospinning process was used successfully to fabricate nanofibers of poly(ethylene oxide) (PEO) in which multiwalled carbon nanotubes (MWCNT) are embedded. Initial dispersion of MWCNTs in water was achieved using amphiphiles, either as small molecules (sodium dodecyl sulfate, SDS) or as a high molecular weight…
Inelastic neutron scattering spectra were measured with a time-of-flight spectrometer on six disordered Cu-Au alloys at 300 K. The neutron-weighted phonon density of states was obtained from a conventional analysis of these spectra. Several methods were developed to account for this neutron weighting and obtain the ph…
Resonance Raman spectra and absolute cross sections have been measured for cresyl violet in aqueous solution and bound to the surface of SiO 2 colloidal nanoparticles. The absorption spectra of cresyl violet on SiO 2 have previously been interpreted to show formation of H-type dimers on the surface. The spectra of the…
We investigate the adsorption and diffusion of colloidal particles at an interface containing a one-dimensional potential well. It is observed how the adsorption kinetics onto the wall is altered with time, and one observes the formation of a particle chain. We find that the time it takes for a bead to penetrate into…
We probe the reversible thermal solidification of crowded solutions of colloidal star polymers in a marginal solvent upon addition of linear homopolymer chains consisting of the same monomers, and for two different linear polymer molecular weights we find that they have a dramatic impact on this phenomenon. If the lin…
First-principles calculations within density-functional theory are used to investigate zinc-blende-structured CrBi. Our calculation predicts ZB-type CrBi to be a true half-metallic ferromagnet with a magnetic moment of 3 μ B per formula. Its half-metallicity can be maintained over a relatively wide range of lattice co…
[reaction: see text] Decatungstate W(10)O(32)(4-) photosensitized oxidation of a series of para-X-substituted 1-aryl-1-alkanols was investigated. The only oxidation product of the side-chain of the 1-aryl-1-alkanol was the aryl ketone. The product analysis and kinetic data of the title reaction support a hydrogen atom…
Octahedral-shaped single crystals of LiM x Mn 2 - x O 4 with M = Cr, Co, and Ni were successfully grown for the first time in high-temperature molten chlorides at 1023 K. Single-crystal X-ray diffraction confirmed the cubic Fd 3̄ m space group and the lattice parameters of a = 8.2179(9) Å for Li 1.00 Cr 0.50 Mn 1.50 O…
Abstract A carpetlike dense‐layer formation between a hydrophobic layer and a polyelectrolyte brush layer has been found in the monolayers of an ionic amphiphilic diblock copolymer, poly(1,1‐diethylsilacyclobutane) m ‐ block ‐poly(methacrylic acid) n , on a water surface by an X‐ray reflectivity technique. By detailed…
Synthetic amorphous (Si 0.71 Ge 0.29 )O 2 has been investigated by high-energy synchrotron x-ray diffraction ( E = 130.1 keV), in order to achieve a better understanding of amorphous structures built from the two network-forming oxides SiO 2 and GeO 2 . The interatomic distances and bond angles that were determined ar…
Abstract Bismaleimide‐modified novolak resin/silsesquioxane (BMI‐PN/SiO 3/2 ) nanocomposites were prepared by the sol–gel process. The reactions in the sol–gel synthesis were characterized by Fourier transform infrared spectroscopy. It was found by field emission scanning electron microscopy and atomic force microscop…
This paper presents thermal decomposition behavior of 50 mass % hydroxylamine/water solutions (HA) when contacted with iron in the form of ferric oxide, ferrous ion, and ferric ion. If HA comes in contact with iron ion (Fe 3+ or Fe 2+ ), even in small concentrations and at ambient temperatures, it reacts violently to…
Large increases in the upper critical field ${B}_{C2}(0)$ are reported in bulk superconductors that demonstrate another novel property for nanocrystalline materials. Disordered nanocrystalline ${\mathrm{P}\mathrm{b}\mathrm{M}\mathrm{o}}_{6}{\mathrm{S}}_{8}$ superconductors were fabricated by mechanical milling and hot…
The incoherent quasi-elastic neutron scattering study of poly(vinyl alcohol) based hydrogels was carried out to elucidate the dynamic state of water caged in polymeric matrixes with different degree of cross-linking and nature of the cross-linking agent. This investigation focuses on the determination of the relations…
The early stages of thermal oxidation of the basal plane of highly oriented graphite (HOPG) have been investigated in ozonized air. Scanning tunneling microscopy (STM) was employed to determine the surface topography on the nanometer scale. At temperatures within the range 300−500 °C and at O 3 concentrations below 1…
The interaction of ethyne with vacuum-dehydrated CuNaY zeolite has been investigated by means of Fourier transform infrared spectroscopy and cluster model density functional theory calculations. The spectra show three bands: two which are symmetry-forbidden for the free molecule but become allowed in the adsorbed stat…
The chemical composition of lipids from bast fibers of flax (Linum usitatissimum), which are commonly used for high-quality paper pulp production, was thoroughly studied by gas chromatography-mass spectrometry. The main compounds identified were waxes, series of long chain n-fatty alcohols, n-aldehydes, n-fatty acids,…
A high-speed camera was used to observe the motion of the three-phase contact (TPC) line for a small rising bubble ruptured by a submerged horizontal glass plate. The experimental data for the radial position of the TPC line as a function of time were used to examine both hydrodynamic and molecular-kinetic models prev…