Materials Literature
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The features of the magnon spectrum in easy-plane multiferroics (such as BiFeO 3 ), which allow inhomogeneous magnetoelectric (flexomagnetoelectric) interaction P [( L ∇) L − L div L ], where L and P are the antiferromagnetic moment and electric polarization, respectively, have been theoretically analyzed. It has been…
The effect of material type, yarn count, pick density, type of mordant and layers of fabrics on the electromagnetic shielding properties of textile materials has been studied. The shielding effectiveness of the fabric is measured by estimating the insertion loss incurred to the signal when the sample is placed in the…
Polycrystalline La2/3Sr1/3MnO3 thin films were synthesized by pulsed laser ablation on single crystal (100) yttria-stabilized zirconia substrates to investigate the mechanism of magnetotransport in a granular manganite. Different degrees of granularity are achieved by using the deposition temperatures (TD) of 700 and…
The radial thermal expansion coefficient αr of pure and Xe-saturated bundles of single-walled carbon nanotubes (CNTs) is measured in the interval 2.2–120K. The coefficient is positive above T=5.5K and negative at lower temperatures. The experiment was done using a low-temperature capacitance dilatometer with a sensiti…
Abstract Dry sliding wear characteristics of ultrafine-grained Al alloys 1100, 5052, and low carbon ferrite-martensite dual phase steel (Fe-0.15C-0.25Si-1.11Mn-0.06V) were investigated. The Al alloys and the steel were processed by the accumulative roll bonding and the equal channel angular pressing, respectively, to…
We report numerical investigations of a 3D model of diffusive growth of fine particles, the internal structure of which corresponds to different crystal lattices. A growing cluster (particle) is immersed in and exchanges monomer building blocks with a surrounding medium of diffusing (off-lattice) monomers. On-surface…
B 12 icosahedra or related structure elements determine the different modifications of elementary boron and numerous boron-rich compounds from α-rhombohedral boron with 12 to YB 66 type with about 1584 atoms per unit cell. Typical are well-defined high density intrinsic defects: Jahn-Teller distorted icosahedra, vacan…
The analysis of FTIR absorption spectra of CO and of 12 CO- 13 CO isotopic mixtures is reported for gold catalysts supported on a number of oxides. Relationships between the nanostructure and the CO adsorbing properties of the different gold catalysts are discussed. In particular, on titania supported gold, where part…
In This study, finite element models of Single-Walled Carbon Nanotube (SWCNT) in their perfect form were generated. Then, after deriving mechanical properties in agreement with existing literature values, different levels of perturbation and missing atoms in the structure were applied. In another approach, some of the…
Room temperature ferromagnetism is observed in Zn1−xCuxO (x=0.01, 0.03, and 0.05) thin films grown on Al2O3 substrates by pulsed laser deposition technique. Raman scattering and high resolution transmission electron microscopy analyses confirm the substitution of Cu up to 3% in ZnO host lattice, and the films are near…
Abstract The FT‐IR and FT‐Raman spectra of anilinium sulfate were recorded and analyzed. The surface‐enhanced Raman scattering (SERS) was recorded from a silver electrode. The vibrational wavenumbers of the compound have been computed using the Hartree‐Fock/6‐31G* basis and compared with the experimental values. The m…
The in vitro hydrolytic degradation of irradiated biodegradable polymers was studied. Poly(L-lactide), poly(lactide-co-glycolic acid) (PLGA)(80:20), and PLGA(50:50) polymers were first electron beam irradiated at 5 Mrad before hydrolytic degradation. Hydrolysis of these films was characterized through their physical p…
A solution based hydrothermal method is used for the preparation of LaPO4:Yb–Tm doped and LaPO4:Yb/Tm core-shell upconverted nanorods. The morphologies, structure, formation mechanism, and upconversion emission properties of these nanocrystals are investigated in detail. Tensile strain is observed for LaPO4:Yb–Tm dope…
Abstract The authors have published several papers on the rotating disk apparatus (RDA) in recent years. The RDA is used to measure acid reaction rates, reaction order and activation energy of acidizing fluids with carbonate reservoir rock. This paper summarizes the different ways that acid reaction rates are measured…
We investigated the relationships between fluctuations in environmental factors and blooms of the diatom Stephanodiscus hantzschii by bi-weekly monitoring from February 2001 to February 2002 and from February 2004 to February 2005, in the eutrophic lower Han River (LHR), South Korea. With the exception of the summer r…
Abstract Smooth and micro/nano‐structured fluorocarbon coatings are obtained by radio frequency (RF), 13.56 MHz, glow discharges fed with hexafluoropropylene oxide (C 3 F 6 O, HFPO) both in glow and in afterglow. It is shown that the extent of micro/nanostructuring, as well as the F/C ratio of the coatings, can be pre…
To demonstrate that barium titanate‐based ceramics could be sintered at a low temperature thus reducing the cost of capacitor production, systematic investigation has been made on the structure and dielectric properties of barium titanate‐based X8R ceramics, doped with various Nd 2 O 3 content and different ZnO–B 2 O…
A peptide-amphiphile (C12-Abeta(11-17)) was constructed with a key fragment of amyloid beta-peptide (Abeta(11-17)) attached to dodecanoic acid through an amide bond. The self-assembly behavior of C12-Abeta(11-17) in aqueous solution is studied at 25 degrees C and at pH 3.0 and 10.0. Abeta(11-17) cannot form ordered se…
The effect of 1 at.% N addition on the shape memory effect of Ti – Nb alloys was investigated. The shape memory effect and superelasticity were observed in Ti –(18–20) Nb –1.0 N and Ti –(21–25) Nb –1.0 N alloys, respectively. The Ti –23 Nb –1.0 N alloy exhibits the best superelastic properties with almost perfect reco…
Plasma species that form plasma polymer deposits readily penetrate through small openings and are therefore well suited to coat the interior of porous objects. Here, we show how the size of the cross section of square channels influences the penetration of active species from a hexane plasma and how it affects the for…