Materials Literature
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Abstract Novel amphiphilic molecules consisting of a rigid 2‐phenylthiophene core, with a polar flexible tri(oxylethylene) moiety attached to the phenyl ring and one or two alkyl chains attached to the thiophene ring at the other side have been synthesized by using Ni(II) and Pd(0) catalyzed coupling reaction as key s…
Lithography faces today many challenges to meet the ITRS road-map. 193nm is still today the only existing industrial option to address high volume production for the 22nm node. Nevertheless to achieve such a resolution, double exposure is mandatory for critical level patterning. EUV lithography is still challenged by…
Carbon/carbon (C/C) composites were modified with a borate sol–gel precursor by a novel process integrating sol–gel and solvothermal processes in order to improve the low temperature antioxidation properties of the C/C composites. Results show that the surface of the modified composites is covered by a molten B2O3 lay…
We report on the electrical characteristics for the metal-insulator-semiconductor (MIS) structure of low-dielectric-constant SiOC(−H) films. The SiOC(−H) thin films were deposited on p -Si(100) substrates by using a plasma-enhanced atomic layer deposition (PEALD) system. To improve the structural and the electrical ch…
In this paper, the optical properties of a nanoscale silicon slot-waveguide has been rigorously studied by using a full vectorial H-field finite element method (VFEM) based approach. The variations of effective indices, effective areas, power densities in the slot-region and the confinement factors of the slot wavegui…
In this paper we present two numerically efficient and accurate techniques for the analysis of doubly-infinite periodic arrays, which find applications as Frequency Selective Surfaces (FSSs), Electronic Bandgap (EBGs) structures and Metamaterials (MTMs). The first method, suited for the analysis of periodic elements w…
The present paper reports an experimental investigation of rapid solidification (RS) influence on the structure and mechanical properties of commercial AZ91 magnesium alloy. In order to obtain RS material melt spinning process was applied in protective atmosphere, resulting in formation of 50 to 100 μm thickness RS ri…
The effect of static pressure on the electric properties of vitreous materials Cu1 − x Ag x GeAsSe3, where x = 0.95, 0.9, and 0.85 is studied. The pressure dependences of impedance and dielectric loss tangent at pressures 15–45 GPa are analyzed. The ranges of substantial changes in the electrical properties of the sam…
A typical 0.3-μm gate-length submicron GaAs metal-semiconductor field-effect transistor (MESFET) is simulated using a complete energy model that solves a complete form of the energy conservation equation, and also using a simplified energy model that only neglects heat flux for electrons. The simulations are carried o…
Partial discharge (PD) measurement is a sensitive method for insulation condition monitoring of high-voltage power equipment. Based on an analysis of the pulse sequence, a method for the identification of PD sources is proposed. Individual pulses extracted from the sequences and analyzed using cross-correlation techni…
Carbon nanotubes (CNTs) are a promising material for novel sensor and interconnect applications. In both cases, the device performance depends strongly on the electronic properties of the tubes. Methods for tuning the electronic structure and especially the band gap are highly desirable. A computational study of cobal…
The electronic, geometric, and magnetic structure of nanofilms of the β phase of iron disilicide FeSi 2 with the (001), (100), and (010) surfaces have been simulated through density functional calculations. A substantial reconstruction of the (001) surface terminated with silicon atoms has been observed, which was acc…
Abstract The influence of welding parameters, i. e. the welding current, root gap and the shielding gas flow rate, on the tensile strength of AISI 304 austenitic stainless steel welded with gas tungsten arc welding was investigated. To determine the optimum levels of the parameters, the Taguchi approach was used to in…
Presently Metallic Rods that Are Used for Spinal Fixtures Cannot Meet the Requirements of both Surgeons and Patients; Surgeons Require the Material to Have a High Young’s Modulus to Suppress Springback during the Operation, whereas Patients Require the Material to Have a Low Young’s Modulus to Prevent the Stress-Shiel…
Abstract Phase transformations of freestanding nanoparticles are well analyzed. The situation is different for particles embedded in a second matrix. The special case of melting and crystallizing of nanoparticles in a rigid matrix is the topic of this study based on the energy balance, resulting in a size dependency o…
Silica nanofibres were synthesised by electrospinning a commercially available silica solution with an aqueous 5% poly (ethylene oxide) (PEO) solution to produce composite PEO/ silica nanofibres. Using a ratio of 80% PEO solution to 20% silica solution, random nanofibrous silica membrane were produced after being subj…
Porous coordination frameworks (PCF), which contain metal-organic and covalent-organic frameworks, are new types of porous materials constructed by coordination bonds between metal clusters/organic bridging ligands and organic building units. These materials have shown significant potential for CO2 capture and separat…
The present study examined the influences of industrial chitin extraction processes on the residual oxytetracycline (OTC) and oxolinic acid (OA) in shrimp carapaces and shells. The drugs were orally administered by catheter to the kuruma shrimp (Penaeus japonicus) and vannamei shrimp (Penaeus vannamei). The shrimps we…
This paper has aims to share fundamental knowledge for magnetic abrasive polishing and to mainly introduce recent research results. In order to enhance a magnetic flux density for nonferrous materials, advanced magnetic abrasive polishing system which is called 2nd generation system was established by electro-magnet a…
Experimental observations show that the nematic order parameter is signicantly enhanced as the thickness of the cell is reduced. Calculations of earlier theories do not agree well with the experimental data. We propose a simple extension of MaierSaupe theory to account for the enhancement. A molecule near the surface…