Materials Literature
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We present the results of extensive ab‐initio Molecular Dynamics (AIMD) simulation of the structural, electronic and vibrational properties of hydrogenated amorphous silicon (a‐Si:H) in a wide range of hydrogen concentration and preparation conditions. We focus mainly on vibrational spectra as important and unique sig…
Fission cross sections in statistical model of fission are calculated using one of important parameter such as transmission coefficients. This parameter calculated using optical model parameter and level density. There are several models of level density that can be used to predict fission cross section. They are Cons…
The preparation of visible light driven photocatalysts for photocatalytic water splitting has been achieved by a CO₂ free, low cost and simple novel method. Combination of peroxide based route with organic free solvent and titanium nitride, carbon free precursor and air and moisture stable, would be useful. Clear red-…
Among the activities led by the Generation IV International Forum (GIF) relative to the future nuclear systems, the improvement of recycling of fuel elements and their components is a major issue. One of the studied systems by the GIF is the graphite-moderated high-temperature gas cooled reactor (HTGR). The fuel eleme…
In alpha radioactivity measurement using ionized air transportation (AMAT), conversion from ion currents to radioactivity accurate is required. An ion transport simulation provides ways of complementarily determining conversion factors. We have developed an ion transport simulation model. Simulation results were compa…
Since the discovery of a heavy fermion superconductor CeCu2Si2 in 1979, heavy fermion superconductivity has been observed in several rare earth and actinide compounds. Especially the development of high pressure technique and crystal growth makes it possible to investigate the pressure-induced superconductivity in the…
A metal-ion source equipped with an EB (Electron Beam) gun for the evaporation of solid materials was designed, and its prototype source was constructed. The prototype produced the source plasma successfully by PIG discharge with the metal vapors of titanium, zinc, and manganese without feeding any ignition gas. As a…
We report on the monolayer formation of hydrocarbons with terminal groups of thiol, hydroxyl and alkynyl groups on H-terminated silicon using UV light in order to clarify the ability to form the well-defined monolayer. The each molecule was dissolved in the solution (100 mM) and irradiated with UV light on the Si-H su…
In this paper we investigate whether the EFAST method is suitable for use in long-term safety assessments of geological repositories for radioactive wastes. A generic test case for a HLW repository in a clay formation was selected. Despite the skewed and heavily tailed distribution of the model output, the EFAST resul…
Nitrogen Adsorption by Activated Carbon Saturated with FullerenesThe ability of activated coal (AC) to capture and hold fullerenes is associated with the AC pore structure and considerably differs for different ACs. To reveal the nature of the AC holding capacity, the authors studied adsorption of nitrogen by AC sampl…
Thermal management in nanometer size scale devices is becoming a major challenge with the development of nanotechnology. In many applications, e.g. thermoelectrics, it is critical to be able to control electron and phonon thermal conduction separately. To gain a microscopic understanding of phonon thermal transport me…
Quantitative analysis based on structural reliability methods is ideally suited to managing corrosion and cracking damage in pipelines as identified through in-line inspection. An ongoing industry-sponsored initiative has laid out a reliability-based process that is intended to form the basis for an industry-accepted…
Polyvinylidene fluoride (PVDF) nanocomposites filled with low loading levels of pristine multiwalled carbon nanotubes (MWNTs), carboxyl functionalized MWNTs (FMWNTs) and vapor grown carbon nanofibers (VGCNFs) were prepared by a versatile coagulation method. The ac electrical conductivity of the composites was investig…
Cell behavior is mediated by variety of physiochemical properties of extracellular matrix (ECM). Material composition, surface chemistry, roughness, and distribution pattern of cell adhesive proteins are among the ECM properties which are known to modulate various cellular physiological functions. Mechanical stiffness…
Analysis of data for historical consumption of the most important energy sources and carbon emission leads to a method to calculate the carbon emission with another fuel mix than the actual one. It is shown that a continued growth of nuclear power could have replaced the whole Kyoto process.
The effect of flexible spacer length on the liquid crystalline property of ABA-type triblock copolymers containing azobenzene groups was investigated. For the study, the monomers, n-[4-(4-ethoxyphenylazo)phenoxy]alkyl methacrylates with varying methylene groups (n = 0, 2, 6) were used to synthesize a series of azobenz…
Solar-absorbers of Ni-NiO is evaluated with a method where the effective refractive index has been analysed to determine the steepness in the transition from low reflectance in the solar wavelength range to high in infrared.
Ferroelectric materials have very appealing properties such as their dielectric permittivity, piezoelectric coefficients and permanent polarization. Two large scale applications of ferroelectric thin films are already achieved: on-chip large capacitances (MIM) and ferroelectric random access memories (FERAM). The focu…
We present theoretical calculations and experimental results demonstrating the negative refraction in indefinite permittivity medium based on SiO2-SiC- SiO2 multi-layer structure. Also the enhancement of higher order Fourier harmonics has been experimentally shown.
A novel solution-based S2/P/S1/Glass broadband antireflection coating which has a low and omnidirectional reflectance was demonstrated. The additional S2 film immensely improves mechanical properties, while the impact for AR properties is very small.