Materials Literature
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In this paper, low-frequency mechanical spectroscopy has been used to study poly(methyl methacrylate) (PMMA) melt around the glass transition temperature Tg for shedding light on its unique relaxation behaviors. The mechanical spectra show an asymmetrical broad structure with a maximum peak on the high-temperature sid…
In this article, the performance of stretch denim fabric under the effect of repeated home laundering practices was studied. Four denim fabrics with different percentages of elastane were subjected to various simulated home laundering cycles, i.e. one, three, five, and 25. After the repeated home laundering processes,…
Monodisperse noble metal nanoparticles are of tremendous interest for numerous applications, such as surface-enhanced Raman spectroscopy, catalysis or biosensing. However, preparation of monodisperse metal nanoparticles is still a challenging task, because typical preparation methods yield nanoparticle ensembles with…
The nonlinear problem of excitation of hypersound by an alternating magnetic field in a normally magnetized ferrite plate is considered. The plate is characterized by uniaxial and cubic anisotropies and exhibits magnetostriction. The equations of motion and boundary conditions for the magnetization components and for…
Abstract Nanoindentation allows local characterization of the microstructural processes associated with pseudoelastic recovery in NiTi shape memory alloys. We discuss nanoindentation and tensile testing results, both carried out at different temperatures on a NiTi alloy with three different microstructures (containing…
The facile synthesis of mono and bis 1,3-diazabicyclo[3,1,0]hex-3-ene derivatives containing phenol ring, which behave as photochromic materials, is reported.
The magnetic and electronic properties of the transition metal (TM) (V, Cr, Mn, Fe, Co, Ni, Cu) doped In 2 O 3 have been theoretically studied by using the density functional theory. When two TM ions are placed close to each other (TM-TM distance of about 3.4 Å), the ferromagnetic ordering is found to be the lowest-en…
We present the first chemical application of the recent, general theory of the nuclear magnetic resonance shielding and chemical shift in paramagnetic compounds, to a set of nonaxial high-spin metallo-organic complexes. The theory is for the first time rigorous for systems of arbitrary spatial and spin symmetry, and i…
We perform molecular dynamics simulations of a coarse-grained model of a polymer-solvent mixture to study solvent evaporation from supported and freestanding polymer films near the bulk glass transition temperature T(g). We find that the evaporation process is characterized by three time (t) regimes: An early regime w…
Friction measurements have been performed on microcrystalline, ultrananocrystalline, and diamond-like carbon (DLC) films with natural diamond counterfaces in the temperature range of 8 K to room temperature. All films exhibit low friction (μ≤0.1) in air at room temperature. In ultrahigh vacuum, microcrystalline diamon…
The effect of strain on the microstructure and detailed internal structure of dislocation boundaries in pure polycrystalline fcc metals (aluminum, copper, nickel and gold) was systematically studied and compared as a function of strain following compression at room temperature. At low strains all metals form a cellula…
Polyhydroxyalkanoates (PHAs) are biodegradable and renewable polymers produced by a wide range of bacterial groups. New microbial bioprospection approaches have become an important way to find new PHA producers and new synthesized polymers. Over the past years, bacteria belonging to actinomycetes group have become kno…
Magnetic and magnetoelectric properties of ferroborate single crystals with complex composition (Tb1 − x Er x Fe3(BO3)4, x = 0, 0.75) and with competing exchange Tb-Fe and Er-Fe interactions are investigated. Jumps in electric polarization, magnetostriction, and magnetization are observed as a result of spin-flop tran…
PbS fishbone-like architectures were synthesized by using a biomolecule ( l -methionine)-assisted approach in a mixture solvent made of ethanolamine (EA) and distilled water. Additionally, other PbS homogeneous morphologies (e.g., hexapod-like, coralloid, and dendritic) were obtained through altering the experimental…
A new bactericidal system composed of fibreglass impregnated with silver (Ag) nanoparticles was developed and tested. Silver content, particle size and distribution were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The antibacterial effectiveness was evaluated against Escherichia co…
The effects of oxygen concentration and film thickness were studied on the microstructural, electrical, and magnetic properties of Fe65Co35–O alloy films prepared by dc magnetron sputtering at room temperature. The films showed the best magnetic softness with a large saturation magnetization of 21.5 kG, low coerciviti…
Development of a novel low-power linear magnetostrictive actuator is presented in this paper. The magnetostrictive material used here is Terfenol-D, which is an alloy of the formula$\hbox{Tb}_{0.3}\hbox{Dy}_{0.7}\hbox{Fe}_{1.92}$. In response to a traveling magnetic field inside the Terfenol-D element, it moves in the…
In the present study, we systematically described the tuning of the diameter of single-walled carbon nanotubes (SWNTs) from individual catalyst particle by temperature-mediated chemical vapor deposition (CVD). The basic idea is to change the temperature quickly during the growth of ultralong SWNTs via a “kite mechanis…
Rapid progress made in the physics of ferroelectrics is accompanied by the appearance of new requirements for the design of microwave phase shifters that serve as base elements in phased-array antennas, which, apart from traditional applications in radiolocation, have been widely used in various telecommunication syst…
The surfaces of Nitinol (TiNi), a popular metal alloy for arterial stents were thin-coated with diamond-like carbon (DLC) and then grafted with poly(ethylene glycol) (PEG) to increase biocompatibility. The TiNi control, DLC-coated TiNi (TiNi—DLC), and the PEG-grafted TiNi—DLC (TiNi—DLC—PEG) surface characteristics and…