Materials Literature
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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 cetyltrimethyl…
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…
This work concerns the photoluminescence (PL) studies of intense orange emission in phosphate based phosphors doped with trivalent europium. The present compounds were prepared by combustion synthesis, and the completion of the synthesis was confirmed by X-ray diffraction (XRD) pattern. The PL emission spectrum of Eu3…
Photoinduced current transient spectroscopy (PICTS) has been utilized to study electrically active defects in TlInS 2 single crystals doped with Er, B, and Tb. Eight traps with activation energies lying in between 0.21 to 0.55 eV have been detected. The origin of these traps is discussed.
This paper introduces the method of on-line measurement of the yarn evenness using a CCD image sensor. The sensor is mounted on a movable bracket of the small car. The obtained yarn coefficients of variation in the diameter through computer and digital image processing techniques are compared with those of using off-l…
Integration of porous low dielectric constant materials constitutes a major roadblock in the reliable manufacturing of back end of the line (BEOL) wiring for the advanced technology nodes. The two main issues for Ultra low-k (ULK) materials are their low mechanical properties and high sensitivity to plasma induced dam…
The paper presents an analysis of the thermo-kinetic field - the heat dissipation on an electronic structure, triac and heat sink. The analysis method proposes an electro-kinetic model, analogue to the thermo-kinetic model, validating the electro - thermal analogy as a possible solution for the problem. The convection…