Materials Literature
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Raman spectroscopic measurements of sodium bismuth titanate $({\mathrm{Na}}_{0.5}{\mathrm{Bi}}_{0.5}{\mathrm{TiO}}_{3}$ or NBT) were carried out upon cooling from 1000 to 80 K to study its two phase transitions. Full spectral deconvolution was performed, comparing the results from several fitting models, with a partic…
The adsorption and dissociation of molecular O2 over silver extended surfaces, nanoparticles and clusters of different size, as well as the reaction between adsorbed O2 and H2 to form less nucleophilic hydroperoxide groups have been investigated by means of periodic DFT calculations. Hydroperoxide formation from O2 an…
The kinetics of NO X storage on a lean NO X trap (LNT) were studied using NO X breakthrough curves measured with a laboratory reactor. A much wider range of temperatures (125–450°C) was used than in most studies to facilitate discrimination between potential models. The breakthrough curves were run until the LNT was s…
A new technique combining in situ X-ray diffraction using synchrotron radiation and infrared thermal imaging is reported. The technique enables the application, generation and measurement of significant thermal gradients, and furthermore allows the direct spatial correlation of thermal and crystallographic measurement…
Abstract Silver nanoparticles (AgNPs) have cytotoxic properties via generation of reactive oxygen species which are involved in the generalized sickness behavior of the host, including fever and lethargy among others. The aim of the present study was to investigate the impact of AgNPs on the ability of rat peripheral…
A new class of blend system comprising weather resistant acrylonitrile/styrene/acrylate (ASA) terpolymer and Zn-ionomer was developed. Based on Zn-ionomer content, the blend system either forms ‘mushroom’ or ‘brush’ type conformation which affected dynamic rheology, DSC, DMA and creep properties differently. Formation…
In this article, two Ni-based cermet electrodes have been fabricated and their electrochemical performances have been evaluated for CO 2 electrolysis on solid oxide electrolysis cell (SOEC). It was found that Ni–SDC cermet electrode showed lower cathodic overpotential than Ni–YSZ electrode. The improved cell performan…
Periodic individual ZnO nanorod arrays were grown on indium tin oxide (ITO) conductive substrates buffered with a ZnO seed layer. Electron beam lithography was used to pattern the pre-coated poly(methyl methacrylate) (PMMA) layer into a periodic aperture template. Because of the constraint effects of this template, th…
A superhydrophobic surface with a water contact angle of 159 ± 2° and a sliding angle of 2 ± 2° on a zinc substrate is reported in this article. The process is composed of etching, replacement deposition and annealing treatment. The surface morphologies, chemical compositions and hydrophobicity of the as-prepared surf…
Monodispersed particles of amorphous calcium carbonate (ACC) 90 to 200 nm in diameter are accessible at room temperature in ethylene glycol and water using a vortex fluidic device (VFD). The ACC material is stable for at least two weeks under ambient conditions.
Polycrystalline Pb(Fe0.5Nb0.5)O3 (PFN) samples have been synthesized to study the effect of rare-earth ions, La and Eu, on multiferroic physical properties. The synthesis of materials in controlled PbO atmosphere accounted for the pyrochlore free ceramics with tetragonal structure. Small amount (1 at.%) of rare-earth…
Crack prevention of biodegradable polymer coatings on drug-eluting stents was investigated by introducing a nano-coupled layer at the interface between the metal surface and the polymer coating layer using surface-initiated ring-opening polymerization of ε-caprolactone. Poly(d,l-lactide-co-glycolide) coating on cobalt…
Data on corresponding solid–liquid equilibrium of dibenzothiophene (DBT) in different solvents are essential for a preliminary study of industrial applications. In this study, the solubility behavior of DBT in different solvents, such as methanol, ethanol, isopropyl alcohol, butan-1-ol, formic acid, and acetonitrile a…
The effect of silver nanoparticles (sNP) on the demixing and the evolution of morphology in off-critical blends of 90/10 and 10/90 (wt/wt) PS/PVME [polystyrene/poly(vinyl methyl ether)] was probed here using shear rheology and optical microscopy. The faster component (PVME) has a higher molecular weight (80 kDa) than…
Abstract We report the successful grafting copolymerization of acrylic acid (AA) on a crosslinked porous chitosan membrane in supercritical carbon dioxide at pressures ranging from 13 to 25 MPa with the use of benzyl peroxide (BPO) as the reduction–oxidation free radical initiator. The effects of reaction pressure, in…
We propose an all-optical scheme to prolong the quantum coherence of a negatively charged nitrogen-vacancy (NV) center in diamond at cryogenic temperatures. Optical control of the NV spin suppresses energy fluctuations of the ground states and forms an energy gap protected subspace. By optical control, the spectral li…
In this Letter, we study a new kind of organic polymer waveguide numerically and experimentally by combining an ultrathin (10-50 nm) layer of compactly packed CdSe/ZnS core/shell colloidal quantum dots (QDs) sandwiched between two cladding poly(methyl methacrylate) (PMMA) layers. When a pumping laser beam is coupled i…
CdTe/CdSe core/shell structured quantum dots do not suffer from the defects typically seen in lattice-mismatched films and can therefore lead to improved solid-state lighting devices as compared to the multilayered structures (e.g., In x Ga 1– x N/GaN). To achieve these devices, however, the quantum dots must be optim…
In this paper, three new low band gap Schiff bases were prepared by using 3-etoxy-4-hydroxybenzaldehyde and different o-phylene diamines. Then, these Schiff bases were converted to low band gap polyurethane derivatives, and their photophysical, electrochemical, thermal, mechanical and morphological properties were inv…
The mechanical performance of ceramic matrix composites (CMC) is strongly related to the properties of the reinforcement. In case of the polycrystalline alumina Nextel® 610, these are dominated by the grain structure of the fiber. Within this study we show, that the surrounding matrix material and the processing condi…