Materials Literature
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Experimental data for foams lead to different values of the elastic moduli depending on the performed test, i.e. compression and tension tests give a different set of parameters than shear and bending tests. This may be explained by the size effect, which depends on the microstructure of the foams. Thus, in this paper…
The magnetic susceptibilities of a series of compounds, β'-X[Pd(dmit)2]2 (X = Me4As, Me4P, Me4Sb, Et2Me2P, and Et2Me2Sb, where Me = CH3 and Et = C2H5), have been investigated. The temperature dependence of χ has been analysed in terms of the two-dimensional spin-1/2 Heisenberg antiferromagnet on the triangular lattice…
In the present work, we studied thiram on silver surface by SERS. Investigations of disulfides with SERS revealed that the molecules undergo a surface reaction on silver, namely easy cleavage of the S-S bond. We believe that the two S atoms of resonance formed from the thiram may be chemisorbed strongly on Ag sol. Thi…
quasi-one-dimensional (1D) titania nanostructures - single-walled nanotubes formed by rolling [101] planes of TiO$_2$ (anatase phase) are modeled and their electronic properties and bond orders indices are studied using the tight-binding band theory. We show that all zigzag (n,0)- and armchair (n,n)-like nanotubes are…
The scaling properties of the roughness of surfaces grown by two different processes randomly alternating in time, are addressed. The duration of each application of the two primary processes is assumed to be independently drawn from given distribution functions. We analytically address processes in which the two prim…
We report experimental results on quasi-two-dimensional diffusion limited growth in directionally solidified succinonitrile with small amounts of poly(ethylene oxide), acetone, or camphor as a solute. Seaweed growth, or dense branching morphology, is selected by growing grains close to the [111] plane, where the in-pl…
The donor binding energies associated with the ground state and a few excited states, are computed as a function of the dot size and the impurity position within two and three dimensional GaAs quantum dots. The calculation has been done using the Potential Morphing Method - a recently developed numerical method for th…
Some FeTPP−Cl/carbon electrocatalysts, heat-treated at temperatures up to 800 °C, have been studied with cyclic voltammetry, x-ray photoelectron spectroscopy, extended X-ray absorption fine structure, and in situ Mössbauer spectroscopy. It appears that the heat treatment induces considerable site heterogeneity in elec…
We use extended Mie theory to investigate optical forces induced by and acting on small silver nanoparticle aggregates excited at surface plasmon resonance. It is shown that single molecules can be trapped at junctions between closely spaced nanoparticles, which are simultaneously pulled together by optical forces. Th…
An autocatalytic electroless gold process suitable for electronic packaging applications, particularly wirebonding needs, is described. This process yields high purity, non porous soft gold of any thickness that meets or exceeds all military specifications. The process can be used for a wide variety of organic laminat…
The non complete charge collection efficiency observed in Semi-Insulating (SI) Gallium Arsenide (GaAs) particle detectors has been generally attributed to trapping effects. However most of the detectors analyzed in literature can only operate below the depletion voltage. We present a careful analysis of the output sig…
Recent improved of larger-scaled microwave devices at the field such as communication systems demand a high-performance wiring substrate which has high thermal conductivity and good high-frequency characteristics. Aluminum nitride (AlN) has been considered a hopeful candidate to meet these demands because of its high…
We studies the surface characteristics and mechanical properties of four brands of poly(ether urethane) feeding tubes incubated for eight weeks at 37/spl deg/C in simulated gastric juice. Surface degradation was characterized by scanning electron microscopy and energy dispersive spectroscopy (SEM/EDS). Changes in mech…
This paper describes it method for monitoring electromigration (EM) resistance of multilayered metal interconnects which have been widely used in recent LSI technologies. We studied the combination of SWEAT (Standard Wafer-Level Electromigration Acceleration Test) patterns and the BEM (Breakdown Energy of Metal) metho…
The Safety Interlock System (SIS) at the Synchrotron Radiation Research Center (SRRC) is introduced. SIS is designed to protect people from exposure to accidental high radiation. It is composed of three subsystems. The Access Control System (ACS) prevents people from being exposed to the extremely high radiation insid…
The paper describes a non-destructive electro-optical diagnosis concept of partial discharges in solid dielectrics. The aim of the measurements is to localise the partial discharges, to gain information about the power density of the discharges and the correlation with the damage of the dielectric surface. This makes…
The pulsed electro-acoustic method was used as a nondestructive measurement technique of space charge distribution in dielectric materials. In our work presented here, we measured simultaneously the space charge distribution and conduction current in the low-density polyethylene samples with elevated temperatures up t…
Although the fast breeder reactor (FBR) was developed by many countries as the economical nuclear reactor, many countries have stopped developing FBR, except France and Japan, for economic reasons. Nuclear power is important for Japan as a source of energy, therefore Japan will continue to investigate nuclear energy s…
This paper is devoted to electrical and photoelectrical properties of silicon MIS structures with REO insulator such as yttrium, lutetium and samarium oxide films. Interface properties and barrier energies of metal-REO and silicon-REO interfaces are the subject of these investigations.
This paper describes the fundamental characteristics of EPDM (ethylene propylene rubber) which is applied as a high voltage insulation material. Also recently, polymer compounds have been applied as high voltage insulation materials. EPDM rubber is inferior in weather resistance to silicone rubber. However, we found t…