Materials Literature
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The authors have investigated the magnetic, electrical, and structural properties of MnxGe1−x (on Ge substrate) nanostructured films produced by a nanopattern assisted Mn implantation followed by annealing. The semiconducting property and hole-mediated ferromagnetism mechanism enabled them to control the magnetic phas…
Indian bentonite collected from two different sources, namely Barmer district, Rajasthan and Cutch district, Gujarat was screened and purified using the well-known Stoke's law of sedimentation by dispersing different concentrations of bentonite (0.5, 1, 2, 3 and 4%) in deionized water. Chemical composition and cation…
A single crystal X-ray diffraction method is the most powerful technique for the crystal structure determination of both organic and inorganic compounds. However, a number of organic compounds crystallize in a form of polycrystalline powder rather than a single crystal of suitable size and quality for X-ray crystallog…
Summary: A brief review of the standard Johnson-Cook model is presented. Three optional strain-rate forms are introduced and calibrated to laboratory data for A36 steel. Next a brief description of the LS-DYNA implementation of the new strain-rate forms within the existing viscoplastic formulation of the JohnsonCook m…
Removal of methanol molecules from the interstices of a metal-organic framework based on a 2-D hexagonal Mn(II)-TCNQF(4) net results in stronger magnetic interactions and leads to a glassy magnetically ordered state; the magnetic behavior can be reversibly cycled upon solvation-desolvation of the material.
The inhibitive effect of exudate gum from Dacroydes edulis in the corrosion of aluminium in HCl solutions was studied using weight loss and thermometric methods at 30-60 o C. The results reveal that the exudate gum acts as an inhibitor for corrosion of aluminium in HCl solution. The inhibition efficiency increases wit…
Iron addition was attempted in this study to improve the pseudo-capacitive property of Mn oxides. The oxides were prepared on graphite substrates by anodic deposition. The deposition solutions were manganese acetate aqueous solutions with various amount of (up to ). Crystal structure and surface morphology of the depo…
MgO insulation coating with thickness of ca. 50nm was evaporated on the surface of iron powder and fabricated soft magnetic composite(SMC) with low iron loss. The MgO insulation coating had greater heat resistance than conventional phosphate insulation coating, which enabled stress relieving annealing at higher temper…
Two photochromic dithiazolylethene-based derivatives (1a and 2a) incorporating a push–pull structural motif D–π–A are synthesized and structurally characterized. The photochemical reactions, which reversibly modify the connection between the electron donor and acceptor, result in simultaneous and effective photo-modul…
Our goal is to develop the functionalized superparamagnetic iron oxide nanoparticles (SPIONs) demonstrating the capacities to be delivered in liver specifically and to be dispersed in physiological environment stably. For this purpose, SPIONs were coated with polyvinylbenzyl-O-beta-D-galactopyranosyl-D-gluconamide (PV…
This paper presents methodology developed for the computational modeling and design of negative refractive index materials (NIMs) based on molecular chirality. An application of the methodology is illustrated by ab initio computations on two organometallic molecules which constitute the monomer units of a chiral polym…
In this paper we present and investigate a stochastic model and its associated Fokker–Planck equation for the lay-down of fibers on a conveyor belt in the production process of nonwoven materials. The model is based on a stochastic differential equation taking into account the motion of the fiber under the influence o…
Alginate (ALG) hydrogels incorporating vascular endothelial growth factor (VEGF) were nano-coated with polyelectrolyte multilayer (PEM) films composed of chitosan (CT) and dextran sulfate (DEX) in order to control the VEGF release from the hydrogels. When non- and nano-coated ALG hydrogels containing VEGF were incubat…
We present physical and electrical evidence of the Thomson thermo-electric effect in line-type phase-change memory cells. This causes a shift of the molten zone during RESET programming towards the anode contact, and as a consequence the phase change material (PCM) design at the contact area has a significant influenc…
Emerging host-guest chemistry of synthetic nanotubes is reviewed, including the preparation of their encapsulation complexes, guest dynamics, exchange and potential applications.
Polycrystalline Si photovoltaic cells were coated with photoluminescent phosphors to increase the power conversion efficiency by down-conversion of high energy ultraviolet photons to less energetic visible photons, for which the Si solar cell conversion efficiency is greater. Phosphor coatings consisting of Y2O3:Eu3+,…
The authors report the simple and easy method to fabricate transition-metal–carbon nanotube hybrid materials through nitrogen mediation. Ni nanoparticles were uniformly dispersed on carbon nanotubes without any pretreatment such as defect activation by strong acids or covalent functionalization processes. A theoretica…
The repeated introduction of an a-dione unit and its reaction with an arene-1,2-diamine allows the stepwise annulation of all four pyrrolic rings of a porphyrin, as is demonstrated by the synthesis of a trisquinoxalinoporphyrin, a tetrakisquinoxalinoporphyrin and the more elaborated bisporphyrin.
With the introduction of nanoscale in situ imaging technologies, a new understanding of the microscopic processes that underlie widely used empirical ‘rate laws’ is emerging. This review summarizes recent findings that the kinetics of mineral dissolution can be explained by equivalent, but inverse, microscopic process…
The synthesis of new soluble conjugated metallopolymers 4a–c and 5a–c containing Zn, Ni and Cu salphen derivatives is reported. The structures of the high molecular weight polymers are confirmed by NMR, IR, UV-vis, and fluorescence spectroscopic studies. Zinc-containing metallopolymer 4a exhibits strong aggregation be…