Materials Literature
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The collective collisionless dynamics of the electron gas in free-electron nanofilms irradiated by an obliquely incident $p$-polarized laser wave are considered in the classical hydrodynamic and jellium-model approximations. The two cases of cold metallic nanofilms and hot free-electron nanofilms laser ionized and las…
Today, clothing factories have to strictly control their costs to survive and continue their success. Fabric cost constitutes about half of a garment cost. For this reason, it is important to calculate the fabric cost of a garment precisely. The study described in this paper aims to develop software that will calculat…
We have investigated orbital ordering in the bilayer manganite, $\text{Pr}{({\text{Sr}}_{0.1}{\text{Ca}}_{0.9})}_{2}{\text{Mn}}_{2}{\text{O}}_{7}$, using synchrotron x-ray diffraction techniques, in particular resonant soft x-ray diffraction. Diffraction signals are observed at $(0,\frac{1}{2},0)$ above 300 K and $(\f…
It is still unclear whether hyperquenched water (i.e., amorphous glassy water) heated to about 140-150 K remains glassy until it crystallizes near 154 K or whether instead it turns into a supercooled and very viscous liquid. It has been proposed that the glass transition temperature (T(g)) for water is 165 K and not,…
PurposeNickel–titanium arch wires have a prominent role in orthodontic appliances due to their desirable mechanical properties. The purpose of the present study is to determine the effects of autoclave and dry-heat sterilization on the bending properties of three types of NiTi superelastic wires.MethodsIn this experim…
Abstract AgScP 2 Se 6 , AgErP 2 Se 6 and AgTmP 2 Se 6 were obtained by high temperature reaction of stoichiometric amounts of the elements in evacuated silica ampoules. They crystallize in the space group P 1 c , Z = 2 with the lattice constants a = 6.463(1) Å, c = 13.349(1) Å (AgScP 2 Se 6 ), a = 6.578(1) Å, c = 13.4…
The current-voltage (I-V) characteristics of single ZnO nanowires were measured varying with temperature and illumination. A model of the ZnO nanowire sandwiched by back-to-back diodes was utilized to explain the experimental data. Simulations of the I-V curves exhibited that the surface barrier height was independent…
Conventional antireflection coating by thin films of quarter-wavelength thickness is limited by material selections and these films’ refractive indices. The optimal design by non-quarter-wavelength thickness is presented in this study. A multilayer thin-film model is developed by the admittance loci to show that the t…
The electrical properties of Ca 0.33 CoO 2 epitaxial films are investigated as the Ca 2+ -arrangement is transformed. Despite identical Ca-content, annealing the film caused the Ca-arrangement to change from a √3 a × √3 a hexagonal type to a 2 a × √3 a orthorhombic type, which was confirmed by X-ray diffraction and sc…
Red upconversion (UC) emission at 626 nm is obtained from a LiNbO(3) crystal codoped with Er(3+) and Eu(3+) under 800 nm femtosecond laser excitation. Energy transfer from ((2)H(11/2,),(4) S(3/2)) levels of Er(3+), which are excited by excited state absorption, to (5)D(1) of Eu(3+) followed by rapidly relaxing to (5)D…
Thiolated dimeric tetramethylrhodamine (TAMRA) was synthesized in a straightforward procedure utilizing commercially available 5(6)-succinimidyl TAMRA and cystamine hydrochloride. The thiol-containing TAMRA dimer displayed distinct spectral properties in reduced and oxidized forms; covalent dimer formation produced gr…
Pd-cluster-functionalized carbon nanotubes (CNTs) have been shown experimentally to be effective hydrogen sensors. Semiconducting CNTs exhibit much higher sensitivity than ensemble (mixed) ones. Using the nonequilibrium Green's function method combined with the density-functional theory, we simulate and contrast the (…
Webbings are used in parachute assemblies as reinforcing units for the strength they provide. The strength of these seams is an important characteristic which has a substantial influence on the mechanical property of the parachute assemblies. It is well established that factors such as fabric width, folding length of…
Purpose The purpose of this paper is to investigate microwave reflection, transmission, and complex permittivity of p-toluene-2-sulfonic acid doped conducting polypyrrole coated nylon-lycra textiles in the 1-18 GHz frequency with a view to potential applications in the interaction of electromagnetic radiation with suc…
Based on the hyperbolic dispersion relation for a strongly anisotropic medium, we propose a kind of pyramid-shaped hyperlenses (PSHLs) consisting of multilayer of planar silver and dielectric films for three-dimensional (3D) subdiffraction imaging at optical wavelengths. Numerical simulations by using the finite diffe…
The structuring effects of the core and sheath on the tensile properties of core-spun yarns need to be systemized in order to meet potential application requirements. In this study, the core— sheath structuring effect was modeled theoretically, using a spring and damper as mechanical elements. Core-spun yarns with hig…
The 1 × 1 rib knitted fabric is mostly used for collar, cuff, waistband, etc. of outerwear knitted garments and it is also very popular nowadays for using as preforms of knitted composite structures. A geometrical model to predict the dimensional properties of conventionally knitted 1 × 1 rib fabric is created and giv…
The synthesis of CdTe nanocrystals capped with thiolated methoxypolyethylene glycols can be performed both in water and in toluene. The evolving nanocrystals are compatible with a variety of different solvents. A phase transfer of nanocrystals initially prepared in toluene to water and subsequently to chloroform occur…
Horizontally and vertically aligned helical polyacetylenes (H-PAs) are synthesized by using orientation-controlled chiral nematic liquid crystals (N*-LCs) consisting of vertical orientation inducers, chiral dopants and parent N-LC. The chemically graspable pictures of horizontal and vertical N*-LCs and the correspondi…
Here, we report some new iron arsenide superconductors of REFeAsO 1−δ (RE = Ho, Y, Dy and Tb) that were successfully synthesized by a high-pressure synthesis method with a special rapid quenching process, with the onset superconducting critical temperatures at 50.3, 46.5, 52.2 and 48.5 K for RE = Ho, Y, Dy and Tb, res…