Materials Literature
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We have studied the magnetic and electrical properties of LaySr1−yTi0.9Fe0.1O3−δ films for compositions where y=0, 0.2, 0.5, and 0.7. All the films exhibited room temperature ferromagnetism with a magnetic moment ranging from 0.7 μB/Fe to 0.2 μB/Fe. The SrTi0.9Fe0.1O3−δ (y=0) sample is an insulator with a small polaro…
Interaction between a 1/21 1 1{1 1 0} edge dislocation and voids or coherent bcc Cu precipitates (diameter D = 2 or 4 nm) in Fe with their centre displaced by ±Δz from the dislocation glide plane is investigated by computer simulation for temperature T = 0 to 450 K. Voids provide the highest critical stress, τc, when…
Concentrated water−alkaline solutions of sodium and potassium borohydrides are used as a fuel and as a hydrogen source in hydrogen power engineering, including low-temperature fuel cells, where borohydrides are converted into metaborates. The performance of such mixtures is determined by the solubility of their compon…
In this paper, we study the radiation-induced point defects related to the phosphorus element that is commonly used to improve the optical properties of silica-based glasses but is responsible of a dramatic increase in their radiation sensitivity. To this aim, the influence of x-ray irradiation on prototype phosphorus…
The collective dielectric relaxation studies have been carried out on the electroclinic liquid crystals (ELCs) doped with 0.1 to 0.2 wt % of graphene oxide (GO) in the frequency range of 20 Hz to 1 MHz. The GO favors for a good quality vertical alignment without any surface treatment of the substrates. The coupling of…
Recently, we have shown that a polycrystalline Ni–Mn–Ga magnetic shape-memory alloy, when containing two populations of pore sizes, shows very high magnetic-field-induced strain of up to 8.7%. Here, this double-porosity sample is imaged by x-ray microtomography, showing a homogenous distribution of both pore populatio…
An amphiphilic dendron containing an azobenzene ring at the focal point and the l-glutamate peripheral groups was designed. Its monolayer formation and host-guest reaction with cyclodextrins at the air/water interface and the properties of the transferred Langmuir-Blodgett (LB) films were investigated. The individual…
Amide proton transfer (APT) imaging is a new MRI technique that detects endogenous mobile proteins and peptides in tissue via saturation of the amide protons in the peptide bonds. Initial studies have shown promise in detecting tumor and stroke, but this technique was hampered by magnetic field inhomogeneity and a low…
Cu-doped Zn1−xCdxS nanoparticles were synthesized by coprecipitation technique in ice bath at 280 K. The band gap energy of Zn1−xCdxS:Cu nanoparticles can be tuned to a lower energy by increasing the Cd content, indicating the formation of the alloyed nanoparticles. The alloy structure is further supported by the syst…
Transformation of proteins and peptides to fibrillar aggregates rich in β sheets underlies many diseases, but mechanistic details of these structural transitions are poorly understood. To simulate aggregation, four equivalents of a water-soluble, α-helical (65 %) amphipathic peptide (AEQLLQEAEQLLQEL) were assembled in…
In this article, the dynamic magnetostrictive effect of giant magnetostrictive materials is studied and a novel general nonlinear transient constitutive model is established, in which the eddy current effects are incorporated. The validity and reliability of the obtained nonlinear transient constitutive model are veri…
Three phase composite materials are widely used in the shipbuilding industry. When reinforced with fiber and particle, the physical and mechanical properties of polymer composite materials are improved. This paper presents the bending analysis of a three phase composite plate with an epoxy matrix, reinforced glass fib…
A series of polyamide 6/hyperbranched polymers (PA6/HBP) blends with different HBP contents was prepared by melt processing using a twin-screw extruder. The HBP was synthesized on the basis of pentaerythritol and dimethyl terephthalate according to a one-step method. The melt flow behavior, crystallization behavior, m…
The properties of two pairs of recently synthesised compounds with mesogenic unit were compared. The four compounds consist of a central segment (based on biphenyl or phenylbenzoate) with symmetric carbon chains ended with vinyl or epoxy groups. Typical measurement techniques (including microscopic observations, diffe…
The analysis of the airflow from sub-nozzles that have different emitting cross-sections is described. At first, tests were carried out outside the profiled reed and comparison between nozzles was made in terms of air velocity distribution, jet spreading, consumption and exerted drag force. Subsequently, in order to a…
In recent years, several reporter genes have been developed that can serve as a beacon for non-invasive magnetic resonance imaging (MRI). Here, we provide a brief summary of recent advances in MRI reporter gene technology, as well as detailed "hands-on" protocols for cloning, expression, and imaging of reporter genes…
It is often assumed that droplets dispensed into standard microplate wells will automatically fill their bottoms. We show here by computational simulation and experimental verification that the ability to fill the well bottom is dependent on the surface wetting characteristics. The release of droplets at the center wa…
We studied the multiferroic properties of the incommensurate spiral phase of ${\text{Mn}}_{1\ensuremath{-}x}{\text{Co}}_{x}{\text{WO}}_{4}$ using single-crystal neutron-diffraction and ferroelectric measurements. Whereas the rotational plane of the spin spiral is parallel to the $b$ axis for $x\ensuremath{\le}0.05$, i…
The frequency and direction dependence of transmission coefficients at interfaces was investigated theoretically. The interfaces are formed by having two Lennard-Jones materials differing in mass and interatomic potential equally divided at the center of an fcc lattice system. A single frequency wave-packet is generat…
By applying simulated annealing techniques we fit the modified embedded atom method (MEAM) potential to a database of ab initio energies for silicon and construct an improved parametrization of this potential. In addition, we introduce a new, reference-free version of the MEAM potential. This MEAM version is also fitt…