Materials Literature
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Electromagnetic metamaterials, first known as left-handed materials (LHM) or negative refractive index materials (NIM), have attracted intensive attention in the electromagnetic communities in the past years. Right now, the concept of metamaterials has much broader scope than that of LHM or NIM. Metamaterials are actu…
Nowadays there are more and more demands to reuse waste materials, especially in the case of polymers. Our research seeks to reveal the oxidative degradation processes of poly(vinyl chloride) (PVC), which may provide new methods for treating and recycling of PVC waste materials.
In this work we describe the synthesis of porphyrins modified with aminopolycarbonic acids -EDTA and DTPA. Several of mono-and homobinuclear ytterbium and lutetium complexes on the basis of ditopic ligands were synthesized. The dependence of 4f-luminescence quantum yield from the structure of complexes is discussed.
Coating of TiO2 nanoparticles on the plasma activated polypropylene fibers its diagnostics and applications.
We propose a general method to determine the material parameters for arbitrary shapes of cloak based on the Poisson's equation to map the coordinate transformation. As a result, we can obtain the diverse deformation material properties and then the fleld distribution. This method, compared with the previous technique…
The debates study the influence of the molecular structures for polymers welding and establish the conditions when is possible to obtain a welding joint of these and a transition area near welding with properties which ensure good usage. The testing of aptitude of materials for high frequency (HF) welding, were done w…
Abstract Coronary stents have to sustain up to 700 million cycles induced by the cyclic diameter change of coronary arteries. Therefore fatigue tests are required to allow an accreditation or commercial utilization. In the present study coronary stents were investigated after cyclic fatigue in a stent tester. Several…
Recently, β-type Ti alloys composed of non-toxic elements such as Nb, Ta, Zr, Mo and Sn have been studied for biomedical applications. The present author’s research group has also developed these alloys including Ti-Zr-Nb as new biomedical superelastic materials. They reveal strong textures which are formed during the…
The effect of glycerol concentration on the sorption isotherms and water vapour permeability (WVP) of carboxymethyl-cellulose (CMC) films from waste mulberry paper (CMCm) was investigated. The knowledge of sorption isotherms is also important for predicting moisture sorption properties of films via moisture sorption e…
Solubility, metastable zone width and induction period measurements have been performed on zinc sulphate heptahydrate (ZSHH). Interfacial tension values determined from induction period measurements have been used for the evaluation of the nucleation parameters such as radius of critical nucleus and the free energy of…
Amphiphilic nanostructures provide unique environments for molecules that are incompatible with the solvent to be sequestered within their interior. These internal environments provide opportunities for concentrating an analyte or transducer molecule for detection, and the functional groups within the amphiphiles prov…
Abstract We report the thermoelectric properties of polygrain icosahedral Al–Pd–Mn quasicrystal and compare with those of (1/1, 2/1-)AlPdMnSi approximant crystals. To improve the dimensionless figure of merit ( ZT ), we substitute Ga for Al atoms in Al–Pd–Mn quasicrystal in accordance with the guiding principle of “we…
In this study, 100% polyester and silk yarns and core-spun polyester silk yarns with two core/sheath ratios are produced. Fabrics are knitted from these yarns. Effect of core positioning on sheath coverage and core-sheath ratios and plying on various properties of yarns is analyzed. High level of unevenness is observe…
In this study, a theoretical model for describing the relationship between the extension and resistance of 1times1 rib fabric made from conductive fibers is established. A resistance-circuit network was proposed based on the analysis of fabric geometry, and the equivalent resistance of the network was calculated. Fina…
The advantages of a good colloidal processing of tetragonal zirconia for achieving a full densification and a small grain size were determined in this study. The optimization of slurry preparation was studied to obtain well-dispersed suspensions. A deagglomeration technique was applied by bead-milling using grinding m…
Á travers cet article, nous nous sommes intéressés à la boruration thermochimique d'un acier au carbone dans un bain constitué de 70 % de borax et 30 % de carbure de silicium. Afin de ne pas nous encombrer avec une variable supplémentaire que constituent les éléments d'alliage, nous avons opté de travailler sur l'acie…
A simple route for controlling the direction of plasmon-induced photocurrents at gold nanoparticles deposited on TiO(2) films is reported for the first time that is based on the electronic state of gold nanoparticles conjugated to redox-active cytochrome c and plasmon-enhanced electron exchange.
A polycrystalline, Ca0.88Al0.91Si1.09N2.85O0.15, was synthesized by a solid state reaction in the ternary system Ca3N2, AlN, and Si3N4, which was accompanied by a two-step heat treatment, 1600°C for 2 h and then 1800°C for 2 h under the nitrogen pressure of 0.92MPa. The space group of the polycrystalline was confirmed…
Characteristics of SiO x Thin Film Deposited by Atmospheric Pressure Plasma-Enhanced Chemical Vapor Deposition Using PDMS ∕ O2 ∕ He, Lee, J. H., Kim, Y. S., Oh, J. S., Kyung, S. J., Lim, J. T., Yeom, G. Y.
To improve the segmented-in-series tubular SOFC performance operating at 1173 K, we studied cathode interlayer (CIL) and a structural modification of the cell stack using a performance simulation. As the result of changing CIL into (Ce0.8Sm0.2)O2 (SDC20) (type 2) from La0.7Sr0.3MnO3-YSZ (type 1), ohmic polarization (η…