Materials Literature
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A method was developed for the synthesis of three rhenium complexes, (5,10,15,20-tetraphenyl-21 H ,23 H -porphinato)(phenoxo)rhenium(III) (PhO)ReTPP, (5,10,15,20-tetraphenyl-21 H ,23 H -porphi-nato)(chloro)rhenium(III) (Cl)ReTPP, and μ-oxo-bis[(oxo)-(5,10,15,20-tetraphenyl-21 H ,23 H -porphi-nato)rhenium(V)] [O=ReTPP]…
A low absorptivity broadband negative refractive index metamaterial with a multi-gap split-ring and metallic cross (MSMC) structure is proposed and investigated numerically and experimentally in the microwave frequency range. The effective media parameters were retrieved from the numerical and experimental results, wh…
Abstract Low‐molecular‐weight poly(2,6‐dimethyl‐1,4‐phenylene oxide) (PPO) with unimodal polydispersity was synthesized by oxidative polymerization of 2,6‐dimethylphenol in the presence of Cu‐ethylene diamine tetraacetic acid catalyst in water. A series of low‐molecular‐weight PPO oligomers with M n ranged from 360 to…
In this work, thermoplastic starch-clay composite films were prepared via solution casting method. The use of acid-modified clay including kaolinite (HKAO) and vermiculite (HVER) improved the thermal properties of starch matrix. The structure of films was investigated and characterized by XRD and SEM techniques. The r…
Accurate measurement of power losses of high efficiency motors is difficult with the input-output method. In the calorimetric method, the power losses are measured directly rather than using the power difference between the electrical input power and mechanical shaft power. This paper describes a practical calorimetri…
By using the nonequilibrium Green’s function combined with the tight-binding Hamiltonian, we have studied the effects of the edge states on the conductance and the thermopower for zigzag bilayer graphene nanoribbons (ZBGNs). It is shows that the band structure, conductance, and thermopower can be modulated by the boun…
This work compares the extent of linear response regions from standard time-resolving optical detectors for phosphor thermometry. Different types of photomultipliers (ordinary and time-gated) as well as an avalanche photodiode were tested and compared using the phosphorescence decay time of cadmium tungstate (CdWO(4))…
In this work, a ZnO and composite ZnO: TiO2thin films were conducted on glass prepared by sol-gel spray-spin coating technique. The performance and properties of nanostructured ZnO and ZnO: TiO2thin films at different thickness were investigated. The effect of thickness on the electrical properties and optical propert…
The porous silicon (PS) layers with different porosities were prepared by electrochemical anodization method to obtain the desired refractive index in a given range. The optical response of the PS layer has been performed by the reflectance measurements. The obtained data were coupled to Kramers-Kronig analysis and al…
Abstract With the development of nanotechnology, there are growing concerns about biological effects and biosafety of engineered nanomaterials. On the other hand, nanoparticles are widely used in medical fields based on their novel interactions with biological entities. However, there are still a lot of challenges to…
The paper presents experimental data showing that fatigue loading is accompanied by redistribution of the dissolved hydrogen concentration in the region of fatigue damage accumulation. Amodel description of this process as the manifestation of parametric instability of a two-continuum medium is given.
Poly(4,4′-oxydiphenylenepyromellitimide) is used as a polymer matrix for incorporation of zirconia nanoparticles with different compositions (ZrO2 and Y0.03Zr0.97O1.985), sizes (20 ± 5 and 10 ± 2 nm), and morphologies (spheres, hollow spheres, rods). The nanoparticles are incorporated during the synthesis of poly(amid…
Abstract Summary: In this work, poly(acrylonitrile‐butadiene‐styrene) (ABS) and different organically modified montmorillonite clay nanocomposites were prepared by melt intercalation in a co‐rotating twin screw extruder. The influence of the screw torque during processing and of the mixture of the modified organoclays…
<p class="Default">Korosi merupakan masalah serius yang terjadi pada logam karena bisa mengurangi nilai ekonomis dari logam tersebut. Korosi pada baja kapal dipengaruhi oleh kondisi lingkungan seperti kadar salinitas dan suhu air laut. Tulisan ini membahas hasil penelitian yang dilakukan untuk mengetahui pengaruh sali…
Key technologies for Japan Sodium-cooled Fast Reactor (JSFR) have been evaluated. The ten technologies - high-burnup core, safety enhancement, compact reactor vessel, two-loop cooling system using high-chromium steel, integrated intermediate heat exchanger/pump component, reliable steam generator, natural-circulation…
Dierential scanning calorimetry is discussed as a tool for characterization of shape memory alloy materials with the example of Ni 51at.% Ti polycrystalline material. Some inconsistencies connected with the dierential scanning calorimetry analysis results present in the contemporary literature are indicated, for examp…
The corrosion inhibition of mild steel in 1.0 M HCl and 0.5 M H2SO4 by the reed leaves extract (RLE) has been studied using weight loss methods and potentiodynamic polarization techniques. The results show that the inhibition efficiency increases with the increase of RLE concentration in both acids, and the higher inh…
The electrical conductivity of the system based on lignocellulose (LC) biopolymer matrix filled with electrodeposited copper powder has been studied. Galvanostatically produced copper powder, having highly porous, highly dendritic particles with high values of specific area was used as filler. Volume fraction of the e…
Acoustic Partial Discharge (PD) detection method is useful tool to locate PD source in oil-filled transformers. We have studied acoustic wave propagation characteristics, to improve the diagnostic technique for electric power transformer. This paper also reports on new PD location method with considering oil-filled tr…
In the present work, we have reported the effect of Ag NPs seeds on the growth and magnetic properties of Ag-Fe3O4 heterodimer nanoparticles prepared using a two step chemical approach. Three different Ag NPs concentrations have been tried and thoroughly characterized using small angle X-ray scattering (SAXS), transmi…