Materials Literature
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Heteropoly acids Cs x H3 − x PW12O40 · nH2O with different cesium content are synthesized as nanostructured compositions. Their actual composition and specific surface are determined, microstructure studied and proton conductivity measured. Composite electrocatalytic systems based on platinized cesium salt of phosphor…
The article presents the characteristics of pearlite rail steels used in the construction of railways. The article discusses the influence of isothermal annealing process parameters on the pearlite morphology and properties of the R260 steel. The pearlite structure with a diverse pearlite morphology was obtained in th…
The structural, magnetic, and magnetotransport properties of Pr0.5Sr0.5Co1 − x Mn x O3 (x < 0.65) perovskites are studied by magnetization and electrical conductivity measurements in magnetic fields up to 14 T and by neutron diffraction. In the manganese concentration range x < 0.5 and T = 300 K, the crystal structure…
A silk fibroin gel system(e-gel)formed under weak electric fields has potential utility in drug delivery systems.By controlling the nanostructure of silk fibroin in aqueous solution,an e-gel containing silk fibroin microspheres could be formed even from silk fibroin solutions of low concentration(1%).The size of the m…
Modern aircraft are subject to a barrage of high intensity radiated fields (HIRF) from a wide variety of man-made sources. Fortunately, the aluminum skin of traditional aircraft provides significant shielding to the sensitive electronics inside the aircraft. However, the drive to create lighter, more fuel efficient ai…
Acoustic partial discharge (PD) detection method has been developed as an important non-destructive testing technique adopted for monitoring the material processes and for testing, detection, and characterization of any defect in an electrical apparatus like power transformers. This method has advantages like the plac…
In this paper, thin metamaterial-inspired structures are investigated for wide-band absorption of stray signals for THz packages. The absorber itself consists of a low-index, low-loss dielectric sandwiched between a patterned, two-dimensionally periodic, thin metallic layer, and a metal backing. Numerical simulations…
This paper reports a facile method to prepare gold nanocubes with an average size length of 13 ± 2 nm, a shape selectivity >90%, and a very good reproducibility. The gold nanocubes were prepared by photocatalytic reduction of Au(III) using a cationic, water soluble porphyrin as the photocatalyst, and cetyltrimethylamm…
Kurzfassung Die Photovoltaik ist ein junger Industriezweig der stark wachsend auf innovative Technologien setzt. Nicht nur die Verbesserung der Solarzellwirkungsgrade, sondern auch der Einsatz neuer Modultechnologien ist von großer Bedeutung. Das Verschalten von mehreren Solarzellen wird standardmäßig via Weichlöten d…
The size effects in the hardness of three fcc metals, namely, Ni, Cu, and Al, are studied by micro- and nanoindentation, and the boundaries of regions with size effects of various types and the characters of these effects are determined.
The linear muffin-tin orbital method in the local density approximation (LDA + U ) explicitly considering Coulomb correlations has been applied to calculate the electronic structure, magnetic moments, and parameters of the Heisenberg exchange interaction for cobalt ions in BaCoS 2 . Five solutions close in total energ…
The isochoric thermal conductivity of solid n-hexane C6H14 is studied using three samples with different densities for temperatures ranging from 100 K to the onset of melting. In all cases, the isochoric thermal conductivity varies more weakly than Λ∝1/T. The present results are compared with the thermal conductivitie…
Accumulation and relaxation properties of charge in highly resistive materials under electron irradiation were investigated by using an absorption current stimulated by sequential two-pulse electron beams. The amount of absorbed charge corresponding to induced surface charge was obtained from the time integration of t…
The conditions of formation, the structure, and the stability of 0-degree domain walls with noncircular trajectories of the magnetization vector in cubic ferromagnets with induced uniaxial anisotropy along the [011] direction have been investigated. It has been found that magnetic inhomogeneities with such topology ca…
Abstract Summary: Syndiotactic polystyrene (sPS), an attractive polymer due to its wide range of application, forms polymer‐solvent intercalates with a large variety of solvent molecules ranging from liquids to solids. Recently, it has been realized that sPS intercalate prepared from SPS/naphthalene gel is more promis…
Plate impact experiments are a powerful tool in equation of state development, but are inherently limited by the range of impact velocities accessible to the facility. In an effort to dramatically increase the range of pressures which can be studied with available impact velocities, a new experimental technique is exa…
Poly(glycolide) (PGA) oligomers were obtained by ring-opening polymerization (ROP) of glycolide (GA) catalyzed by ammonium decamolybdate (NH4)8[Mo10O34] and using aliphatic primary alcohols as initiators/chain transfer agents (HO‒CH2‒[CH2‒CH2]m‒CH3, where m = 1, 2, 4, 5, 6, 7, 8, 9, and 10). High yield (85–95%) and sh…
The luminescence of 2-naphthol and 2-styrylquinoline fragments, intramolecular energy transfer from the former to the latter, and photoisomerization of the latter are observed in the newly synthesized bichromophoric dyad.
We demonstrate single-wafer cleaning using waveguide-type ultrasonic equipment. The waveguide vibrates as a Lamb wave, and ultrasonic waves of 900 kHz, which is within the megasonic frequency range, radiate from the waveguide side. The waveguide creates a traveling wave field between the waveguide side and wafer surfa…
The magnetization of ternary metal Prussian blue analogues A 1 x A 2 1– x B , formed by three different sublattices A 1, A 2 and B , is studied by using the effective-field theory with self-spin correlations. Effects of the mole fraction x , the anisotropy and the transverse magnetic field on the magnetization are dis…