Materials Literature
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We report on the luminescence properties of bismuth-germanate glasses in which the speciation of bismuth is controlled via addition of CeO2 as an oxidant. A glass system with the composition (70.5-x)GeO2 - 24.5Bi2O3 - 5WO3: xCeO2, with x = 0...2.0, is analyzed in terms of optical properties and redox states of bismuth…
We study the finite-temperature spin dynamics of the paramagnetic phase of iron pnictides within an antiferromagnetic ${J}_{1}$-${J}_{2}$ Heisenberg model on a square lattice with a biquadratic coupling $\ensuremath{-}K{({\mathbf{S}}_{i}\ifmmode\cdot\else\textperiodcentered\fi{}{\mathbf{S}}_{j})}^{2}$ between the near…
Here, we report on the synthesis of α-Mn 2 O 3 complex nanostructures through heat-treatment of the precursor MnCO 3 (in similar structure and size) synthesized by a biomineralization route. The phase, microstructure, and morphology of the obtained sample were characterized by X-ray diffraction (XRD), Fourier transfor…
Zirconium tetraborohydride, Zr(BH 4 ) 4, was synthesized by a metathesis reaction between LiBH 4 and ZrCl 4 using high-energy ball milling. Initially, a white powder was produced, and during storage at −30 °C in a closed vial, transparent rectangular single crystals formed under the lid by vapor deposition. Single-cry…
<b> </b>A novel CeO-ZnO nanocomposite has been synthesized by a sol-gel method based on polymeric network of polyvinyl alcohol(PVA). In this work mixed solvent of 50:50 ethanol water was used to dissolve cerium nitrate,nickel nitrate and PVA. The mixture was heated to 80<SUP>O</SUP>C to form a homogeneous gel solution…
Nanowire-shaped silver have been synthesized by the polyol process in ethylene glycol as a reductant, polyvinylpyrrolidone (PVP) as a stabilizer, using a microwave technique. The products were characterized by transmission electron microscopy (TEM). The presence of sodium chloride in the polyol reduction of silver nit…
H 2 -free CO oxidation and preferential CO oxidation in the presence of H 2 (PROX) have been studied on Ir 100– x Pd x nanoalloys ( x = 0, 11, 45, 89, and 100) supported on alumina or amorphous silica–alumina. The catalysts were prepared by impregnation of acetylacetonates and characterized by transmission electron mi…
Noncovalent interaction of methylene blue dye cation (MB + ) with single walled carbon nanotubes (CNT) is characterized by molecular dynamics (MD) simulation, quantum chemical calculations, and laser desorption/ionization (LDI) mass spectrometry. The MD simulation of the (MB + ) n –CNT ( n = 1–10) complexes in water d…
Utilizing the combined reducing property of antibiotics and sodium borohydride, gold nanoparticles (Gnps) were co-synthesized with the antibiotics (ampicillin, streptomycin and kanamycin) and during this process antibiotics were conjugated with Gnps. The conjugation of nanoparticles was confirmed by dynamic light scat…
Manganese and zinc were selected as alloying elements to develop a Mg-based ternary alloy for biomedical applications, taking into account the good biocompatibility of these metals. The microstructures of Mg-Zn-Mn alloys containing 0.5 or 1.0 mass% of manganese and 1.0 or 1.5 mass% of zinc were investigated by scannin…
Two-faced character in a film: Soft “Janus” two-dimensional colloidal crystal films were made using polystyrene (PS) particles, on an air–water interface as a mold for a flexible polypyrrole layer. By removing the PS particles, an array of femtoliter-sized cups was produced. These two-dimensional colloidal crystal fil…
As a typical smart material, shape memory polymers (SMPs) have the capability of variable stiffness in response to external stimuli, such as heat, electricity, magnetism and solvents. In this research, a shape memory polymer composite (SMPC) tube composed of multi-layered filament wound structures is investigated. The…
Spheres-on-sphere (SOS) silica particles are prepared in a one-pot scalable synthesis from mercaptopropyltrimethoxysilane with hydrophilic polymer and cationic surfactant under alkaline conditions. The SOS particles exhibit solid-core porous-shell properties. The fast separation of small molecules and proteins with lo…
γ-Al2O3 is a porous metal oxide and described as a defective spinel with some cationic vacancies. In this work, we calculate the electronic density of states and band structure for the bulk of this material. The calculations are performed within the density functional theory using the full potential augmented plan wav…
We present a brief review on the evolution of structure, microstructure, electrical and magnetic properties of NiO with transition metal (TM) doping. The fcc structure of NiO is not affected with TM doping whereas the some of the TM ion influences the microstructure. The antiferromagnetic property of NiO is strongly m…
We studied crystal structures in a monolayer consisting of anisotropic branched colloidal (nano)octapods. Experimentally, octapods were observed to form a monolayer on a substrate with a square-lattice crystal structure by drop-casting and fast evaporation of solvent. The experimental results were analyzed by Monte Ca…
The plane strain mechanical fields near a stationary crack tip in a pseudoelastic shape memory alloy (SMA) are analyzed via the finite element method. The small scale transformation assumption is employed for the calculations using displacement boundary conditions on a circular region that encloses the stress-induced…
We report the atmospheric thermal oxidation of chemical vapor deposition (CVD)-grown graphene and its effect on the wrinkles in graphene. Heating CVD-grown single-layer graphene in air at 550 °C leads to the disappearance of the wrinkles and the formation of nanoscale cracks and pits in the basal plane. Under this rea…
In this paper we review the latest developments in the use of severe plastic deformation (SPD) techniques for enhancement of hydrogen sorption properties of magnesium and magnesium alloys. Main focus will be on two techniques: Equal Channel Angular Pressing (ECAP) and Cold Rolling (CR). After a brief description of th…
In this work, we investigate the interaction of gaseous benzene, toluene, ethylbenzene, and o -xylene (BTEX) with Fe 3 O 4 nanoparticles and demonstrate the potential application of Fe 3 O 4 nanoparticles as adsorbents for BTEX. On the basis of X-ray diffraction, transmission electron microscopy, gas chromatography–ma…