Materials Literature
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The synthesis and mesogenic properties of some Schiff bases containing ferrocene, azobenzene units and flexible end chains with 17 or 18 carbon atoms are reported. The compounds have been characterized by 1H‐NMR and 13C‐NMR spectroscopy, DSC and optical microscopy in polarized light.
Diffraction gratings are effective ways of increasing the light absorption of solar cells and the light extraction of light-emitting diodes. In this paper, we show that simplified modal analysis can be used as a conceptual model for understanding the behavior of the diffuse transmittance of lamellar diffraction gratin…
In this paper, experiments for determining the adhesion properties have been performed using two test methods; tensile adhesive test which is widely used in industry and interfacial indentation test still under development in research laboratories. Therefore, only few experimental data on the accuracy of the methods a…
An Fe-13Co-11Ni-3Cr-1Mo-0.2C steel alloy, processed for ultrahigh-strength and fracture toughness, exhibits three distinct hydrogen trap states in a complex precipitation-hardened martensitic microstructure and is susceptible to severe hydrogen embrittlement (HE) at threshold stress intensity levels as low as 20 MPa√m…
The purpose of this study was to evaluate the hepatocellular compatibility and assess the inflammatory response of a novel hybrid scaffold of poly(L-lactide) (PLLA) and fibroin. The hybrid scaffold was obtained by freezing and lyophilizing a blend of fibroin microspheres and PLLA solution. FTIR and scanning electron m…
A unique high-load, high-temperature uniaxial press was developed to measure the rheology of silicate melts and magmatic suspensions at temperature up to 1050 degrees C. This new apparatus is designed to operate at constant stresses (up to 300 kN) or constant strain rates (approximately 10(-7) to 10(0) s(-1)) and furt…
A fundamentally new procedure of synthesis of carboxyethyl chitosan in a physical gel, ensuring higher degree of substitution at lower temperatures and lower consumption of time and chemicals, compared to the existing procedures, was developed. The structure of the resulting products was examined by diffuse reflection…
Large scale, high yield SiC∕SiOx nanocables have been synthesized by thermal evaporation of carbon powders and silicon powders in the presence of Fe3O4 nanoparticle catalysts. Transmission electron microscopy and high-resolution transmission electron microscopy show that the nanocables consist of a 50–300nm single-cry…
Abstract Several types of coatings, designed to improve the resistance of aluminum alloys to corrosion in seawater, were examined. A coating with a thickness of approximately 30 μm was applied to the surface of aluminum alloy 3003, and after creating an artificial defect by means of a knife‐edge, a corrosion test was…
The authors have successfully fabricated planar micro-optical switch device exploiting the transmitting semiconductor (on) to the reflecting metallic (off) phase transition of thermochromic W(1.4at.%)-doped VO2 smart coatings and driven by an external voltage. The starting W-doped VO2-coated Al2O3 exhibited infrared t…
A fundamental investigation of erucamide migration in polyolefin resins was conducted using contact angle, x-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM), and time-of-flight secondary ion mass spectrometry (ToF SIMS). The migration of erucamide to the polymer surface was monitored using a pseudo…
Palladium-capped magnesium–nickel switchable mirror thin films were prepared by DC magnetron sputtering, and their optical switching property using a hydrogen-containing gas was investigated. Although these films show excellent switching between metallic and transparent states initially, optical modulation range decre…
Spontaneous capillary flow (SCF) of a drop in a groove with an ideally sharp corner is possible when the Concus-Fin (CF) condition is fulfilled. However, since ideally sharp corners do not exist in reality, it is important to understand the effect of finite corner curvature on SCF. This effect is analytically studied…
A novel algorithm based on the correlation analysis of waveforms to distinguish between the magnetizing inrush and the short-circuit fault current is proposed. The algorithm makes use of the characteristics of differential current waveform in the nonsaturation zone that it is similar to a part of the sinusoidal wave u…
Porphyrins play a major role as active photosensitizers in noninvasive optical photodynamic therapy (PDT). In a modular approach, this paper presents a short review of the recent developments of porphyrin structures and materials with improved photosensitizing properties and then presents the synthesis and characteriz…
Single-walled carbon nanotube field-effect transistors (CNT FETs) are predicted to have intrinsic cutoff frequencies approaching the THz range. Here ldquointrinsicrdquo means that the parasitic capacitance due to fringing fields is negligible compared to the gate-source capacitance required to modulate the conductance…
This communication describes work and gives results focused on the application of Differential Scanning Calorimetry (DSC) to reveal the effect of thermal aging on the crystallinity variation of XLPE insulation cables. The changes in the crystalline phase of XLPE during aging at four different temperatures have been an…
The use of ultrasound as an enhancement mechanism in the surfactant-aided soil-washing process was examined by conducting desoption tests of soils contaminated with naphthalene or diesel-oil. The experiments were conducted to elucidate the effect of ultrasound on the mass transfer from soil to the aqueous phase using…
Zirconia–titanium (ZrO 2 –Ti) composites have been considered potential thermal barrier graded materials for applications in the aerospace industry. Powder mixtures of Ti and 3 mol% Y 2 O 3 partially stabilized ZrO 2 in various ratios were sintered at 1500°C for 1 h in argon. The microstructures of the as‐sintered com…
During online partial discharge (PD), ultra-high-frequency (UHF) detection of gas-insulated switchgear (GIS), obtaining acceptable levels of sensitivity, still continues to remain a very challenging task, primarily due to strong electromagnetic interference (including white-noise, random, discrete spectral, and stocha…