Materials Literature
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Poly(methyl methacrylate)-based bone cement and layered double hydroxide (LDH) nanocomposites have been used as a grouting material for total joint arthroplasty. Few weight percentage of nanoLDH was uniformly dispersed in the bone cement matrix to have adequate interaction with matrix polymer. Mechanical strength, sti…
Abstract Here, we report on an electrochemical approach so‐called discontinuous anodization (DA) for controlling the generation of pore modulations in nanoporous anodic alumina (NAA) under self‐ordering conditions. In this method, the anodization of aluminium is performed by voltage pulses under mild anodization regim…
Simple procedures for teaching practical radioactivity are presented in a way that attracts students' attention and does not make them apprehensive about their safety. The radiation source is derived from the natural environment. It is based on the radioactivity of radon, a ubiquitous inert gas, and the adsorptive pro…
The FeTe x Se 1− x ( x = 0, 0.25, 0.50, 0.75 and 1) system has been studied using density functional theory. Our results show that for FeSe, the local density approximation (LDA) seems a better approximation in terms of magnitude of magnetic energy whereas the generalized gradient approximation (GGA) greatly overestim…
Electrospinning was used as an effective route to pattern chitosan (CS) and polycaprolactone (PCL) membranes with submicron fibers having different chemical structure (PCL or PCL/collagen) and physical characteristics (size: between ≈200 and 550 nm; randomly oriented or aligned form). While the PCL fibers with diamete…
Nanoporous gold films are prepared using a dealloying method and form a sponge type bicontinuous network. As the structure sizes are below 50 nm, the material forms an effective medium with a negative dielectric constant for near infrared light. The dispersion relation of the propagating surface plasmons on the a…
The aim of this study was to understand the stick–slip properties of para-aramid woven fabrics. Para-aramid Twaron CT®716 (CT716) and Twaron CT®714 (CT714) woven fabrics were used to conduct the pull-out tests. CT716 and CT714 woven fabrics have low and high fabric densities, respectively. Data generated from the sing…
Recent research has investigated the use of ultrasonic or hydrodynamic cavitation for chemical reactors, water treatment equipment, and heat generators. In this article, a new cavitation heat generator is introduced. The proposed system utilizes an electric motor to rotate the generator, and various experiments are pe…
Photoswitchable polymer nanoparticles (ps-PNPs) have been constructed by emulsion polymerization through embedding an iridium(III) complex, [Ir(bt)2(pic)](bt = phenylbenzothiazole, pic = picolinate), as a fluorophore and a diarylethene derivative (DTE) as a photochrome. The ps-PNPs show reversible luminescence modulat…
The aim of this research work was to study the surface properties and sorption characteristics of differently treated regenerated cellulose fabrics. Surface modifications of viscose, modal and lyocell samples caused by using standard chemical pre-treatment procedures were compared to an alternative activation procedur…
The synthesis of nanoparticles using a gas-liquid interfacial reaction, which for the first time is shown to result in highly monodisperse materials across a range of sizes, is presented. We demonstrate, using cadmium phosphide as the paradigm that this synthesis method can provide colloidal nanocrystals or quantum do…
The study of an innovative fluoropolymer masking layer for silicon anodization is proposed. Due to its high chemical resistance to hydrofluoric acid even under anodic bias, this thin film deposited by plasma has allowed the formation of deep porous silicon regions patterned on the silicon wafer. Unlike most of other m…
The research focuses on the influence of elastane (Spandex) incorporation in the weft direction of cotton fabrics, and the structural properties (fabric density, type of weave) on the thermal and water vapor resistance level. For that purpose, woven fabrics, in plain and twill weave with two different densities (17 an…
We use linear stability theory and numerical simulations to show that spontaneous phase separation in elastically coherent solids is fundamentally altered by the presence of free surfaces. Because of misfit stress relaxation near surfaces, phase separation is mediated by unique surface modes of spinodal decomposition…
The formal replacement of a pyrrole moiety of meso-tetraarylporphyrin 1 by an oxazole moiety is described. The key step is the conversion of porpholactones 4 (prepared by a known two-step oxidation procedure from 1) by addition of alkyl Grignard reagent to form meso-tetraaryl-3-alkyl-2-oxachlorins 9 (alkyloxazolochlor…
A tungsten crown: The {SO(4)} units were introduced into the {W(30)} crown, resulting in a new Preyssler polyoxoanion {S(5)W(30)} with position-specific, guest, K(+) or Na(+) ions in its geometrical center. The as-prepared polyoxoanion exhibits an interesting ion-selective encapsulation of K(+) and Na(+) (see figure).
Cu/Ni nanoparticles (NPs) with stable fluorescence and excellent water dispersion were synthesized through a facile aqueous solution method with a similar Kirkendall effect. Ultraweak chemiluminescence (CL) from the oxidation reaction between sodium hydrogen carbonate (NaHCO 3 ) and hydrogen peroxide (H 2 O 2 ) in neu…
MgH 2 is a promising candidate for solid-state H 2 storage applications. To improve the H 2 sorption kinetics, highly pure MgH 2 nanofibers were synthesized by a vapor–solid process. The fibers showed improved sorption kinetics compared with bulk MgH 2, which were investigated by a volumetric pressure–composition–temp…
We utilize steady-state and transient optical spectroscopies to examine the responses of nonthermal quasiparticles with respect to orbital modifications in normal-state iron-chalcogenide superconductors. The dynamics shows the emergence of gaplike quasiparticles (associated with a ~36 meV energy gap) with a coincident…
Polyetheretherketone (PEEK) is a high performance polymer, with high melting temperature and high resistance to wear. PEEK biomedical devices are typically manufactured to produce nonflexible structures. In this study, we fabricated flexible PEEK scaffolds from multifilament and monofilament yarns, using weaving techn…