Materials Literature
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Abstract Plasma synthesized silicon carbide (SiC) nanoparticles were dispersed in dichloromethane/poly(bisphenol‐A‐carbonate) (PC) solutions by high power ultrasonification. Samples were then prepared by film casting under well adapted preparation conditions. The influence of the SiC nanoparticles on the molecular mob…
Strong correlations between the electronic, structural and magnetic properties have been found during the study of doped double perovskites Sr2Fe1−xMxReO6 (0 ≤ x ≤ 1, M = Zn, Cr). The interplay between the van Hove singularity and the Fermi level plays a crucial role for the magnetic properties. Cr doping of the paren…
Theoretical methods based on density functional theory have been applied to study the differences in exchange coupling between the di-mu-hydroxo and mu-aqua:mu-oxo tautomers of a dinuclear Cu(II) complex. The calculations indicate that the two compounds are totally different from a magnetic point of view. The transfer…
Localized areas of high heat flux on microprocessors are currently being identified as a dominant challenge for the thermal management community. Heat flux values up to 1 kW/cm2 prevailing over a fraction of the overall CPU surface area create local hot spots that need to be cooled. However, thermal solutions designed…
The problem of terminating a transmission line that consists of a set of coupled loop resonators to support the propagation of magneto-inductive waves is considered. Since the ideal terminating impedance is not easily realisable end-reflections are generally obtained from such a line. Techniques are developed to calcu…
Current design concepts for hybrid systems call for the use of presently available turbine systems. Simply stated, the combustor of a turbine system is replaced with a high temperature fuel cell whose excess heat is used to drive the turbine. However, the startup of a turbine in such a direct fired fuel cell turbine h…
This paper discusses the effect of a F- impurity ion on the spectrokinetic parameters and the thermally stimulated luminescence of Gd2O2S-Tb(Ce) and Gd2O2S ceramics. A relationship is established between the absorption and excitation bands in the 330-380-nm region and the trapping centers responsible for the thermal p…
Stable hollow ZrO2–SiO2 spheres with mesopores in the shell wall have been successfully synthesized by a sol–gel process in an oil–water–oil microemulsion. The samples were characterized by transmission polarized light microscopy, SEM, TEM, and N2 adsorption–desorption isotherms. The characterization results indicate…
A systematic analysis for electrochemical polymerization of aniline, -toluidine (OTO), and -toluidine (MTO) ternary components on an indium-tin oxide (ITO) electrode was performed. Using an experimental design of mixture, empirical models are fitted and plotted as contour diagrams, which facilitate revealing the syner…
アルミドロスを原料として，無機陰イオン交換体の一種であり層状複水酸化物構造を有するハイドロタルサイトの合成を行った．得られた反応生成物に対して，結晶構造，表面構造，熱重量変化などの物性，pH緩衝作用，リン酸イオンの除去能力について検討した．ハイドロタルサイトの合成は，アルミドロスおよびMgCl2含有廃液を用いてAlとMgの複水酸化物の共沈法により行った．反応生成物には少量のSiO2, Al2O3, Fe2O3などが不純物として残存していた．得られた反応生成物の層間距離は約0.3 nmであった．ハイドロタルサイトを773 Kで3 h焼成するとMg–Al酸化物に変化し，焼成後に再水和操作を行うと再びハイドロタルサイトに復元した．反応生…
The length of fuzz and pill formed on regenerated cellulosic knitt fabrics after washing and drying (WD) was determined by electrical resistivity measurements perpendicular to the plane of fabric. The fuzz length of Lyocell Knitted Fabric 1 after 25 times WD was 1.05 mm and was the longest among the three different ly…
Thin films of (x)GeO2:(1-x)SiO2, 0 </= x </= 0.4, were fabricated via the sol-gel technique. Many applications of optics and photonics can benefit from the knowledge of the optical dispersion relationship of this ubiquitous binary ceramic material. The optical properties of the homogeneous and amorphous silica-based f…
Optical properties of Eu doped LiCaAlF6 and LiSrAlF6 crystals grown by Czochralski technique were investigated in vacuum ultraviolet using synchrotron radiation. The 5d→4f and 4f→4f emissions from Eu2+ and Eu3+ ions, respectively, were detected under excitation due to the inter-configurational 4f7→4f65d and 4f6→4f55d…
The new hybrid organic–inorganic copper oxovanadium phosphates of composition Cu4(bipy)4V4O11(PO4)2·nH2O (n ∼ 5) (1) and Cu2(bipy)2V2P2O12 (2) (bipy = 2, 2′-bipyridine) adopting the triclinic symmetry were obtained by soft hydrothermal routes. Both structures present different oxovanadium phosphate anionic units, resu…
Effect of deformation on damping capacity and microstructure of Fe–22%Mn–8%Co alloy has been investigated. The γ→ε stress-induced martensitic transformation occurs during deformation in the alloy. The amount of ε martensite increases rapidly up to 5% deformation, and gradually increases with further deformation. The d…
A dual-polarized frequency-tunable composite left-handed slab (CLS) is proposed. The CLS consists of periodic split-ring resonators (SRRs) along with thin wires. Two orthogonal SRR/wire arrays are utilized for dual-polarization purposes. Polarization-selectivity and frequency-tuning are achieved by means of on/off swi…
Selective chlorination of thiophene-2,3-dithiol with SO(2)Cl(2) generates the corresponding sulfenyl chloride, 2,3-C(4)H(2)S(SCl)(2). Subsequent condensation with Me(3)SiN(3) yields the thiophenodithiazolylium salt [C(4)H(2)S(3)N]Cl, [TDTA]Cl. The structure of the cation, TDTA+, was established by X-ray diffraction as…
We researched the possibilities for engineering the morphology of porous structures in n-InP. Lithographic patterning of the sample surface before anodic etching was shown to modify considerably the electric field distribution which, in its turn, defined the direction of pore growth inside the specimen. We show that l…
Delafossite-type CuYO 2 and CuY 1- x Ca x O 2 ( x ≤0.05) samples exhibited a green-PL-emission band due to the Cu + interconfiguration transition from 3d 9 4s 1 to 3d 10 at room temperature. With increasing Ca concentration, the Cu + emission shifted slightly to the shorter-wavelength side with a slightly weaker emiss…
Some of the applications of the electrochemical noise (ECN) technique in corrosion research as well as some of the promises and realities concerning the use of electrochemical noise analysis (ENA) are discussed. Perceived advantages of ENA include the ease of data collection and analysis. It is often assumed that the…