Materials Literature
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We report on high-frequency (300--700 GHz) ferromagnetic resonance (HF-FMR) measurements on cobalt superparamagnetic particles with strong uniaxial effective anisotropy. We derive the dynamical susceptibility of the system on the basis of an independent-grain model by using a rectangular approach. Numerical simulation…
Changes in the optical-absorption properties of hydroxyl group (\ensuremath{\equiv}SiOH) in silica glasses were studied to determine the specific form of \ensuremath{\equiv}SiOH whose absorption takes place at around the intrinsic absorption edge of silica glass (\ensuremath{\sim}8 eV). In the experiments, four kinds…
The crystallographic texture of electroplated Cu in damascene trenches has been examined by x-ray diffraction pole figure analysis. The influence of two post-plating treatments on the resulting orientation of (111) planes of the Cu inside the trenches are compared. When the as-deposited small-grained Cu is allowed to…
The coupled Hartree–Fock (CHF) equations in second order are derived to calculate dynamic polarizabilities and hyperpolarizabilities for infinite periodic chains. The analytical expressions for the second derivatives of the perturbed crystal orbitals with respect to the quasimomentum k are developed. The first and sec…
Cosputtered Ta–Si–N amorphous films of ten different compositions were investigated as a barrier material for Cu interconnection. The films of relatively low nitrogen content (<47 at. %) undergo an abrupt failure with the formation of tantalum silicides and copper silicide between Si and Cu during annealing. Ta…
The crystal structure of the deuterated Tutton salt (ND 4 ) 2 [Cu(D 2 O) 6 ](SO 4 ) 2 determined by X-ray diffraction at several temperatures between 100 and 321 K is reported. The intermediate and longest Cu−O bond lengths of the Jahn−Teller distorted octahedral Cu(D 2 O) 6 2+ ion progressively converge as the temper…
Scanning tunneling spectroscopy (STS) has been used to investigate the electronic structure of tetrahedral amorphous carbon (ta-C) films. The density of states (DOS) was derived from the normalized conductivity spectra at fixed tip heights. Band edges were defined by extrapolating the generalized conductivity (dI/dV)…
The crystal structure of a triple helical peptide (Pro-Hyp-Gly)10 has been determined at 1.9 A resolution. Single crystals grown by the hanging drop method, diffracted to a resolution of 1.8 A. The polymer-like structure of the triple helical repeat Pro-Hyp-Gly was in accordance with the 7/2 model proposed for collage…
Functionalized metallodendrimers are a rational synthetic target for gas sensing since a range of transition metal centers can potentially be used and the ligand fragments may serve as anchoring points to an appropriate support. The authors summarize the synthetic approach to compounds such as that shown in the Figure…
Shake-and-Bake is a direct-methods procedure which has provided ab initio solutions for protein structures containing as many as 1000 independent non-H atoms. This algorithm extends the range of conventional direct methods by repetitively, unconditionally and automatically alternating reciprocal-space phase refinement…
Common Berthing Mechanism (CBM provides the structural interface between separate International Space Station (ISS) elements, such as the Laboratory and Node modules. The CBM consists of an active and a passive half that join together with structural bolts. The seal at this interface is the CBM-to-CBM molded seal. The…
A new marine diatom, Thalassiosira andamanica, is described from light and electron microscopy. The specimens were collected in the vicinity of Phuket Marine Biological Center, Thailand, and later brought into clonal culture. Thalassiosira andamanica possess a rimoportula with a pronounced outer extension, one margina…
A detailed investigation of the microscopic mechanisms of tensile stress deformation was performed. The experiments involved two different thermoplastic materials: high impact polystyrene (HIPS) and a novel polystyrene (PS)−polybutadiene (PB) blend, at temperatures ranging from 30 to 70 °C, deformed at a constant unia…
We have performed ab initio pseudopotential calculations to study the effects of structural deformations of iron porphyrin on the configuration of a carbon monoxide (CO) attached to it. We have considered two proximal deformations around the heme group: (i) rotation of a pyrrole ring in the iron porphyrin, and (ii) ro…
It is thought that hydrogen bonding is responsible for the ferroelectricity in ammonium tetrafluoroberyllate, (NH(4))(2)BeF(4). In the past X-ray data have been collected, but these did not permit accurate determination of the H-atom positions. In order to obtain more accurate information the neutron structures have n…
In this paper, the high strain powder metallurgy (HS-PM) process was applied to an SUS 316L stainless steel powder, and the microstructural changes during the process are discussed. The HS-PM process is applied to an SUS 316L austenitic stainless steel. In the case of the SUS 316L stainless steel, room temperature rec…
A single crystal of a birefringent Cr-bearing majorite, Mg 3 Mg 0.34 Si 0.34 Al 0.18 Cr 0.14 ) 2 Si 3 O 12, was synthesized at 20 OPa and 2000 °C using “6-8” type uniaxial split-sphere apparatus. This garnet is tetragonal with the unit-cell parameters a ≈ c and deviates slightly from cubic symmetry. The structure refi…
This review comprises an up‐to‐date literature survey on the topic of food contact can coatings. Special consideration is given to the choice of can coating. To avoid reactions between the food and the metal of the can, the interior metal surface is treated with lacquers which act as a barrier. This ensures that the r…
Superplasticity can be generally achieved by grain boundary sliding (GBS). The GBS in polycrystalline materials sometimes accompanies with intergranular fracture because of stress concentrations at triple points and/or GB irregularities. To develop the superplastic flow, it is necessary to suppress the intergranular c…
A series of copolyesters were prepared by the incorporation of p-hydroxybenzoic acid (HBA), hydroquinone (HQ), and terephthalic acid (TA) into poly(ethylene terephthalate) (PET). On the basis of viscosity measurements, high molar mass copolyesters were obtained in the syntheses, and 1H-NMR analyses indicated the total…