Materials Literature
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The fascinating phenomenon of destabilization of charge/orbital order in Nd0.5Sr0.5MnO3 with the reduction of grain size is critically investigated. Based on our magnetic and transport experiments followed by a theoretical analysis, we analyze various possible mechanisms and try to delineate a universal scenario behin…
ZnO nanowires have attracted a great attention as building blocks for the optoelectronic devices. For the practical optoelectronic applications based on the ZnO nanowires, synthesis technique of ZnO nanowire with layered structures is significantly important in order to achieve a p-n junction, a core/shell structure,…
Epitaxial MgAl2O4thin films were grown on Heusler alloy Fe2CrSi by reactive magnetron sputtering of a MgAl2target in an O2+Ar atmosphere. To grow MgAl2O4on Fe2CrSi, we inserted a protective layer of MgAl2between Fe2CrSi and MgAl2O4to prevent Fe2CrSi from being oxidized. Growth of MgAl2O4was found to be very sensitive…
Nanoporous Ti-metal film electrode was fabricated by radio frequency (rf) magnetron sputtering technique on nanoporous TiO2 layer prepared by sol-gel combustion method and investigated with respect to its photo-anode properties of TCO-less DSCs. The porous Ti layer (approximately 1 microm) with low sheet resistance (a…
Specimens made from Vanadis 6 cold work tool steel were machined, ground, heat processed by standard regime and finally mirror polished. After that, they were layered with CrAgN. The Ag-content in the layers was chosen to 3 wt% and 15 wt% respectively. Microstructural analysis revealed that the addition of 3 wt%Ag did…
During the severe accident in nuclear power plant (NPP), large amounts of fission products are released with accident progression, including In-vessel and Ex-vessel release. Thus, the Source term evaluation is essential for the probability risk assessment (PRA) and is still imperative for the licensing and operation o…
The organosolv pretreatment was performed on ”Pinus radiata” chips unbiotreated or biotreated by ”Gloephyllum trabeum”. Its effect on the structural characteristics of the material and therefore in the effectiveness of the enzymatic hydrolysis and fermentation was evaluated. The influences of organic solvents, reactio…
The temperature dependences of resistivity and thermopower measurements reveal that nanocrystals of silicates in lead-silicate glass of various compositions undergo structural transitions in the temperature range of 800 – 1000 K. The diameter of these nanocrystals estimated from Scherrer’s formula is about 0.8 – 1.6 n…
ZnS thin films were deposited on glass substrates using chemical bath deposition. The zinc sulfate and thiourea were used as precursors along with a stable complexing agent of sodium citrate in ammonia/ammonium chloride (pH=10.5) buffer solution. The ratio of Zn and complexing agent was changed from 6:1 to 1:1 by vary…
The structure of amorphous linear-chain carbon (LCC) during the structure formation under conditions of vacuum annealing was studied by electron diffraction and Raman spectroscopy methods. It was shown that the determining factor of lowering the work function of the LCC coating is the formation of nanoclusters of mutu…
In this paper, a novel control method named active harmonic resistance(AHR) which is used to suppress the resonance between the power capacitor and system inductance is proposed. The power capacitor is series with an inductor, which id paralleled with the converter applying AHR control method, which means that the con…
The results of studying the effect of nitrogen ion-beam implantation on the adhesiveness of the WC-8Co hard alloy have been discussed. The indentation of a rotating indenter into a counterbody has been used to measure the adhesion component of the friction coefficient, which has been shown to decrease in the surface m…
Two Oxide Semiconductors, Namely, Bismuth Vanadate (BiVO4) and Silver Bismuth Tungstate (AgBiW2O8) Were Prepared by Solution Combustion Synthesis and their Attributes as Photocatalysts Were Comparatively Evaluated. A Key Conclusion of this Study Is that the Optical Characteristics Alone Provide only a Partial Glimpse…
A QI-free coal tar pitch prepared by solvent extraction from a soft coal tar pitch was subjected to a series of thermal treatments at a predetermined temperature for different holding times. The development of mesophase was discussed in terms of its size and content in the heat-treated pitches. Results showed that the…
The effect of Mo and Ni content on the mechanical properties of low carbon and alloy casting steel by using Vacuum Arc Melting Furnace had been studied in this paper. The results indicated that increasing Mo or Ni content would enhance the hardness and strength of the steel separately, with some of elongation loss. It…
The generation process of interface traps by hot-carrier injection in nanoscale metal–oxide–semiconductor field-effect transistors (MOSFETs) was evaluated by the charge pumping (CP) method, and degradation of the threshold voltage by these interface traps was studied. The generation process is found to follow the conv…
There are over 11 million cancer survivors, yet many long-term cancer survivors experience lasting changes including cardiac functional and anatomical abnormalities following external beam radiation and chemotherapy. One of the well-established pathological and histological sequelae of radiation exposure to the heart…
The results of a combined experimental investigation into the radiative relaxation of anion and cation excitons during selective vacuum ultraviolet-(up edge) and soft X-ray (core) excitation of berylliumcontaining BeO, Be 2 SiO 4 and La 2 Be 2 O 5 crystals are presented. They indicate that the relaxation of anion and…
Ion implantation proved to be a universal technique for producing waveguides in most optical materials. Tellurite glasses are good hosts of rare-earth elements for the development of fibre and integrated optical amplifiers and lasers covering all the main telecommunication bands. Er3+- doped tellurite glasses are good…
This study evaluates the effect of the compression between the punch and the die on spring-back after the punch reaches the dead point. Utilizing the elastic-plastic FEM, the forming and spring-back process of aluminum alloy V-shape sheet is simulated. The investigation is also carried out through experiment. It is sh…