Materials Literature
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Metamaterials (MTM) have become a major electromagnetic research topic. Initial studies have focused on understanding their electromagnetic properties and interactions. This paper presents a novel virtual tool, MTM-FDTD, for the visualization of electromagnetic wave interacting with different metamaterials. Snapshots…
CdSe quantum rods (QRs) are very promising novel materials with unique electronic and optical properties. In this paper, we utilize a broad spectrum of techniques including high-resolution annular dark field scanning transmission electron microscope imaging, electron nanodiffraction, and computer simulations to study…
In this work, it is shown that the previously reported and accepted equivalent circuit models of resonant type left-handed lines, either loaded with split ring resonators (SRRs), or with complementary split ring resonators (CSRRs), need a revision in order to properly account for the different elements of the structur…
Sm 3 + -doped Li2O–SrO–B2O3 glass sample was prepared by the conventional melt quenching method in air atmosphere. Sm2+ ions in this borate glass were obtained by x-ray irradiation reduction method. The as-prepared and x-ray-irradiated samples were investigated by photoluminescence spectrum and decay curve measurement…
Metallic materials are used in biomedical devices for various parts of the human body. The implanted material is exposed to body fluids, such as intercellular fluid and blood depending on the surrounding tissue.
Em função da corrosão acentuada apresentada pelos refratários utilizados nos processos siderúrgicos e diante da necessidade de se tentar minimizar e entender as interações entre escórias e metais fundidos com estes materiais, a técnica da molhabilidade parece ser uma boa alternativa a ser utilizada. São poucos os trab…
Spectroscopic and physical properties of Nd3+-doped alkali lead borate glasses of type 20R 2O · 30PbO · 49.5B2O3 · 0.5Nd2O3 (R = Li and K) and alkaline-earth lead borate glasses 20RO · 30PbO · 49.5B2O3 · 0.5Nd2O3 (R = Ca, Ba, and Pb) have been investigated. Optical absorption spectra have been used to determine the Sl…
A physical yet analytical phase change memory (PCM) model simultaneously accounting for thermal and electrical conductivities is presented. Due to the physics based nature of the model, the essential temperature from heating and cooling of PCM during operation is instantaneously updated. More importantly, the model ca…
Serat ampas tebu (baggase) merupakan limbah organik yang banyak dihasilkan di pabrik-pabrik pengolahan gula tebu di Indonesia. Serat ini memiliki nilai ekonomis yang cukup tinggi selain merupakan hasil limbah pabrik gula tebu, serat ini juga mudah didapat, murah, tidak membahayakan kesehatan, dapat terdegredasi secara…
The nonlinear vibration behaviors of double-walled carbon nanotubes (DWCNTs) are investigated based on Donnell’s cylindrical shell model with van der Waals (vdW) forces between the inner and outer tubes. The harmonic balance method is used to analyze the relationship between the amplitudes and the frequencies of natur…
Abstract The molecular weight and the proposed structure of the Angelica sinensis polysaccharide‐iron complex (APIC) were studied. Fourier transform infrared spectroscopy, X‐ray powder diffraction, differential scanning calorimetry, transmission electron microscopy, electron paramagnetic resonance, thermogravimetric a…
A new synergistic multicomponent organogelator liquid system (MOGLS) was discovered during the standard protocol of tartaric acid-mediated racemic resolution of (+/-)- trans-1,2-diaminocyclohexane. The MOGLS is formed by a 0.126 M methanolic solution of (1 R,2 R)-(+)-1,2-diaminocyclohexane L-tartrate and 1 equiv of co…
Luminescence properties of cerium doped Y3Al5O12(YAG) nanocrystals in form of nanopowders and nanoceramics have been studied. The comparative analysis of luminescence characteristics for nano- and single-crystals has been done. It was detected that an excitonic mechanism of the energy transfer from the host lattice to…
Ultrafine-grained titanium was processed by severe plastic deformation (SPD). The SPD was carried out by equal channel angular pressing (ECAP) at high temperature. The ECAPprocessed sample was further deformed by conventional techniques such as radial forging and drawing. The microstructure was characterized quantitat…
A suspension of commercially available single-walled carbon nanotubes (SWNTs) is directly deposited onto a platinum multielectrode array surface. This is a novel and easy method to reduce interface impedance values which can be used instead of electromodified electrodes. This paper shows that this deposition method is…
Investigations of magnetic micro- and nanoparticles for targeted drug delivery began over 30 years ago. Since that time, major progress has been made in particle design and synthesis techniques, however, very few clinical trials have taken place. Here we review advances in magnetic nanoparticle design, in vitro and an…
This paper presents an analysis of the arcing and flashover performance of contaminated dc insulators of various suspension patterns at high altitudes (1970 m). The experiments tested two types of dc insulators, a bell-type insulator and a tri-shed suspension insulator. The experimental results show that dc arcs play…
This paper discusses electrical insulation characteristics of liquid nitrogen (LN2) / polypropylene (PP) laminated paper composite insulation system for the practical electrical insulation design of high temperature superconducting (HTS) cables. Partial discharge (PD) inception, propagation and breakdown (BD) characte…
The luminescence excitation spectra, luminescence spectra and the nanosecond-scale decay kinetics were studied. The ZnO and ZnO:Al nanopowders were prepared by vaporization-condensation in a solar furnace using different raw powders: commercial, hydrothermal and those obtained by plasma synthesis. Exciton-phonon as we…
A novel characterization metric for phase change memory based on the measured cell resistance during RESET programming is introduced. We show that this dasiadynamic resistancepsila (Rd) is inversely related to the programming current (I), as Rd= [A/I] + B. While the slope parameter A depends only on the intrinsic prop…