Materials Literature
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Abstract Raman scattering investigations on triphenyl phosphite, performed in both the low‐ and high‐wavenumber ranges, provide a detailed description of the glacial state. The latter can be described as a two‐phase (amorphous–nanocrystalline) system if it is prepared by isothermal aging in the 210–222 K temperature r…
Nanocrystalline two-phase NdFeB+α-Fe material was prepared by milling techniques and subsequent heat treatment. These isotropic exchange-coupled powders show excellent hard magnetic properties with enhanced remanences up to 1.20 T and energy densities (BH)max around 150 kJ/m3. The performance is based on (i) the use o…
Diamond is a very simple crystalline system, and we would expect that the effects of radiation damage should be easily understood. As an example of its simplicity, we note that diamond contains only one species of atom, and we show that the effects of isotopic substitution at the self-interstitial can be understood qu…
The structure of Cu/Cu 2 O multilayers fabricated by nonlinear electrochemical deposition has been tuned in two ways: electrochemically, by alteration of the deposition current, and by in-situ illumination during deposition. By choosing the current the thickness of the layers can be controlled, and by choosing the ill…
Millions of acres of land, formerly and currently used for military activities are potentially contaminated by surface and buried unexplored ordnance (UXO). Surface and buried UXO exists at hundreds of sites with diverse geologic and environmental conditions. UXO exists from the surface to depths as great as 10 m and…
Abstract It is shown that polytypes or stacking sequences of cronstedtite, an Fe-bearing trioctahedral 1:1 phyllosilicate, can be determined using near-atomic high-resolution transmission electron microscopy (HRTEM). By viewing along the [010], [310] and directions (orthohexagonal indexing), the four groups of the sta…
Homogeneous metallocene catalysts for the polyolefin production show compared with conventional Ziegler systems remarkable advantages, like the possibilities to regulate the microstructure leading to optimized polymer properties. However, for industrial application it is necessary to immobilize the metallocenes on a h…
The electrical resistivity, magnetization, and magnetoresistance effect have been studied on a series of Zn-doped polycrystalline samples Fe1−xZnxCr2S4 (0⩽x⩽1) with a spinel structure over a wide range of composition and temperature. It is found that the magnetism and magnetoresistance ratio are anomalous, which do no…
The atomic structure of the {111} diamond face after oxygen--water-vapor etching is determined using x-ray scattering. We find that a single dangling bond diamond {111} surface model, terminated by a full monolayer of $---\mathrm{OH}$ fits our data best. To explain the measurements it is necessary to add an ordered wa…
The plume generated by a pulsed XeCl laser from a novel nanostructured YBaCuO target (n target) is investigated by methods of optical emission spectroscopy and atomic force microscopy. While the spectral positions of the emission lines are the same, stronger line intensities, pertinent to higher kinetic energy of the…
A simple model of charge ordering is considered. It is explicitly shown that at any deviation from half-filling (n ≠1/2), the system is unstable with respect to the phase separation into the charge ordered regions with n =1/2 and the metallic regions with a smaller electron or hole density. A possible structure of thi…
A recombinant strain of Salmonella enterica serovar Typhimurium (mutant in propionate-activation activity) was metabolically engineered to control the composition of poly(3-hydroxybutyrate-co-3-hydroxy- valerate) (PHBV), a polyhydroxyalkanoate copolymer with commercially desirable properties. A gene (prpE) encoding pr…
Two polycrystalline samples of CoFe 2 O 4 were prepared by slow cooling and quenching and studied using Mössbauer spectroscopy and X-ray diffraction. The crystals were found to have a cubic spinel structure with the lattice constants of the slowly cooled sample being a 0 =8.381 Å and the quenched sample being a 0 =8.3…
Stern–Gerlach magnetic deflection measurements were performed on Nin and NinCO (n=8–18) in a molecular beam experiment. Adsorbed carbon monoxide was found to reduce the magnetic moments of most nickel clusters in this size range. For Ni8, the reduction was ∼5 bohr magnetons, while smaller reductions were observed for…
The complexes (E)- and (Z)-Fe(η5-C5H4CHO)(η5-C5H4CH=CH−C6H4-4-NO2) [2-(E) and 2-(Z), respectively], (E)- and (Z)-Fe(η5-C5H4CHO)(η5-C5H4CH=CH−C6H4-4-CN) [3-(E) and 3-(Z), respectively], (E,E)-, (E,Z)-, and (Z,Z)-Fe(η5-C5H4CH=CHC6H4-4-NO2)2 [4-(E,E), 4-(E,Z), and 4-(Z,Z), respectively], (E,E)-, (E,Z)-, and (Z,Z)-Fe(η5-C…
The mechanical quality factor of Pb(Mg1/3Nb2/3)O3–PbTiO3(PMN–PT) and Pb(Sc1/2Nb1/2)O3–PbTiO3(PSN–PT) ceramics have been investigated for compositions close to the morphotropic phase boundary. Investigations were performed for various types of lower valent substituents on the B-site cation. These investigations have sh…
We propose using the anisotropic molecule dope method for synthesizing a zero-birefringence polymer that showed no orientational birefringence at any orientation degree of polymer chains. In this method a rodlike molecule with polarizability anisotropy was chosen to compensate orientational birefringence. The zero-bir…
Epitaxial crystallization of syndiotactic polypropylene (sPP) on 2-quinoxalinol (2-Quin) yields, in the lower part of the crystallization range, the less common and metastable form II based on the packing of isochiral helices, rather than the stable antichiral form I. The contact plane is (110) II . Form II exits only…
Neutral homo- and heterobinuclear complexes with the general formula [(tmtacn)MA(salox)3MB] where MA (MnIII or FeIII) is facially coordinated to the cyclic amine 1,4,7-trimethyl-1,4,7-triazacyclononane (tmtacn) and MB (MnIII or FeIII) is coordinated to the azomethine nitrogens and phenolate oxygens of the bridging lig…
Wetting dynamics on machined wood surfaces is of great interest for the adhesive bonding technology of wood. In this work, the change of apparent contact angles with time of phenolresorcinol-formaldehyde (PRF), polyvinyl-acetate (PVAc), and a series of probe liquids on sawed, planed, sanded, and razor-blade-cut wood s…