Materials Literature
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We investigated whether O 3 -tetraethylorthosilicate (TEOS) film formation by atmospheric-pressure chemical vapor deposition (AP-CVD) creates pattern density effects on the underlying layer. The film thickness ratio of a pattern region to the flat region was 1.5 on a film formed by plasma enhanced chemical vapor depos…
Recently, severe plastic deformation processes have been the essence of metal forming researches to produce ultrafine-grained materials. Twist Extrusion is one of the most unprecedented methods developed in recent years, but has some deficiencies. The main one is the microstructure and mechanical heterogeneity, occurr…
Diblock copolymers of styrene and gelable acryloxy propyl triethoxysilane (APTES) were successfully prepared through Nitroxide-Mediated Polymerization (NMP). Their micellar behaviour in dioxane–methanol solutions was investigated by Small Angle X-ray Scattering (SAXS) and Neutron Scattering (SANS) measurements. The mi…
All-wet processes are gaining a renewed interest for the removal of post-etch photoresist (PR) and Bottom Anti Reflective Coating (BARC) in the Back-End-Of-Line (BEOL) semiconductor manufacturing, as an alternative to plasma strip, which may cause damage to advanced porous low- k materials. However, degradation of DUV…
La1–xSrxMn0.8Cu0.2O3–δ (LSMCu, 0.1 ≤ x ≤ 0.4) powders were prepared using the EDTA-citrate complexing process. The synthesized LSMCu powders were a pure perovskite phase, whereas the composition with x = 0.4 has second phases. The unit cell volumes decreased with increasing Sr2+ content because substituted Sr ions cau…
Controlled assembly of nanoparticles can lead to a variety of interesting structures and also is an important step in exploring potential applications. Here, we report a solution process for the self-assembly of macroporous, single-layer to hierarchical Ag2S nanoparticle membranes at the air–liquid interface, in which…
This paper proposes a method of determining the constitutive equation parameters of a Japanese type of alloy steel (SCM440H) for Finite Element Analysis (FEA) of orthogonal cutting, involving pressure bar experiments, orthogonal metal cutting experiments and FEA inverse identification. First, Split Hopkinson Pressure…
The role of shock wave loading profile is investigated for the failure processes in a brittle material. The dynamic damage response of ductile metals has been demonstrated to be critically dependent on the shockwave profile and the stress-state of the shock. Changing from a square to triangular (Taylor) profile with a…
Hybrid systems of silica and polyhedral oligomeric silsesquioxanes (SiO2/POSS) were obtained by the mechanical method with the use of spherical or hydrated silicas, precipitated in the emulsion or aqueous environment. The SiO2 surface was modified with the following cage silsesquioxanes: hepta(isobutyl)2-triethoxysily…
We consider a multiferroic composite chain consisting of BaTiO3 on the one side and Fe on the other side with a linear magnetoelectric coupling at the interface induced by electrostatic screening. Employing the Landau-Khalatnikov equation for the ferroelectric polarization and the Landau-Lifshitz-Gilbert equation for…
The fluorine-containing block copolymers of poly(styrene-block-2,2,2-trifluoroethyl methacrylate) (PS-b-PTFEMA) and poly(4-hydroxystyrene-block-2,2,2-trifluoroethyl methacrylate) (PHOST-b-PTFEMA), which both are capable of both top-down and bottom-up lithography were developed. These block copolymers were synthesized…
The mechanical behavior of an ensemble of fibers which are not bonded to each other subjected to compression is studied using a numerical model. It is shown that the stress-strain curve is a power law and the strain energy is stored predominantly in the bending deformation mode of the fibers. Hysteresis is observed wh…
The effect of aging temperature on the pores of SBA-15 has been studied. The products were investigated using transmission electron microscopy (TEM), Field emission scanning electron microscopy (FESEM), small angle X-ray diffraction (SAXRD) and the nitrogen adsorption- desorption isotherm measurements. It was found th…
Hydrogen deteriorates the strength of steel, and it is well known as hydrogen embrittlement. The susceptibility to this embrittlement is generally increased more with higher strength steels under the usual static loading. Meanwhile fatigue strength is more important in structural use; it is desired to clarify the effe…
In this paper we investigate the band structure of graphene nano-ribbons and the current density. A square root approximation shows that the band energy is parabolic in the low energy limit. In this parabolic region charge transport is controlled by the saturation velocity.
The humidity sensing layer of the molecular (BEDT-TTF)-based metal was chemically deposited on the surface of a polycarbonate (PC) film [BEDT-TTF = bis(ethylenedithio)tetrathia-fulvalene]. The relative humidity (RH) tests carried out at 25 and 40 oC showed that the electrical response of the developed film to RH chang…
Knowledge of the concentration of hydrogen dissolved in materials is essential for the safe design of the components of hydrogen utilization equipment and will help clarify the mechanisms of hydrogen embrittlement. Here, we present a procedure for evaluating the hydrogen concentration in a perfect lattice under practi…
Silkworm silk fibre extracted from cocoon has been well recognized as a promising material for bio-medical engineering applications because of its superior mechanical and bioresorbable properties. Degumming is a surface modification process which allows a wide control of the silk fibre's properties, making the fibre p…
We have calculated the twist viscosity and the alignment angle between the director and the stream lines in shear flow of a liquid crystal model system, which forms biaxial nematic liquid crystals, as functions of the density, from the Green-Kubo relations by equilibrium molecular dynamics simulation and by a nonequil…
The diatom fouling of the Minke whales (little picked whales) in Antarctica have been studied. It was established that the dominant species was Bennettella ceticola (Nelson ex Bennett) Hîlmes, accompanied by Grammatophora marina (Lyngb.) Kütz., Fragilariopsis kerguelensis (O'Meara) Hust. and Nitzschia media Hant. The…