Materials Literature
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Abstract A polycrystalline graphene consists of perfect domains tilted at angle α to each other and separated by the grain boundaries (GB). These nearly one-dimensional regions consist in turn of elementary topological defects, 5-pentagons and 7-heptagons, often paired up into 5−7 dislocations. Energy G(α) of GB compu…
Intercalation of metal atoms is an established route for tuning the coupling of graphene to a substrate. The extension to reactive species such as oxygen would set the stage for a wide spectrum of interfacial chemistry. Here we demonstrate the controlled modification of a macroscopic graphene-metal interface by oxygen…
Advances made in the design and preparation of single-source precursors (SSP) involving main group elements and their use for synthesis of semiconducting materials in the form of thin films and nanoparticles are presented. A series of precursors prepared with 1,2-bis-(diethylphosphino)ethane (depe) are reported and co…
This study addresses the sintering mechanism of Pt nanoparticles dispersed on a planar, amorphous Al(2)O(3) support as a model system for a catalyst for automotive exhaust abatement. By means of in situ transmission electron microscopy (TEM), the model catalyst was monitored during the exposure to 10 mbar air at 650 d…
We present the design, fabrication and characterization of a dual band metamaterial absorber which experimentally shows two distinct absorption peaks of 0.85 at 1.4 THz and 0.94 at 3.0 THz. The dual band absorber consists of a dual band electric-field-coupled (ELC) resonator and a metallic ground plane, separated by a…
The normal-state charge transport is studied systematically in high-quality single crystals of ${\text{BaFe}}_{2}{({\text{As}}_{1\ensuremath{-}x}{\text{P}}_{x})}_{2}$ $(0\ensuremath{\le}x\ensuremath{\le}0.71)$. By substituting isovalent P for As, the spin-density-wave (SDW) state is suppressed and the dome-shaped supe…
We demonstrate, for the first time, a spatially dependent metamaterial perfect absorber operating in the infrared regime. We achieve an experimental absorption of 97% at a wavelength of 6.0 μm, and our results agree well with numerical full-wave simulations. By using two different metamaterial sublattices we experimen…
Graphite oxide sheet, now called graphene oxide (GO), is the product of chemical exfoliation of graphite and has been known for more than a century. GO has been largely viewed as hydrophilic, presumably due to its excellent colloidal stability in water. Here we report that GO is an amphiphile with hydrophilic edges an…
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” opt…
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” opt…
Waveguide electromagnetic modes excited by swift electrons traversing Si slabs at normal and oblique incidence are analyzed using monochromated electron energy-loss spectroscopy and interpreted using a local dielectric theory that includes relativistic effects. At normal incidence, sharp spectral features in the visib…
Past research has demonstrated that steel stud walls can perform well when subjected to large blast events. The construction methods needed to achieve good performance that take advantage of the inherent ductility offered by steel, however, have been costly and have often required the use of specialized connection det…
Abstract In this article, we present a high‐gain low‐profile resonant cavity antenna that utilizes a novel metamaterial surface as a superstrate. Due to the low‐reflection phase value of the metamaterial superstrate, the thickness of the resonant cavity antenna is significantly thinner than the operating wavelength. S…
A thermally balanced H 2 storage system can be created by combining an H 2 carrier that releases H 2 endothermically with one that releases H 2 exothermically. Here, we describe combinations of H 2 carriers wherein both carriers release H 2 by dehydrogenation rather than by hydrolysis. The endothermic carriers tested…
The primary focus of this investigation is on tribological properties of plasma nitrided and post-oxidized tool steels during sliding against ultra-high-strength boron steel. The experimental work has been carried out at room temperature and at 400 °C by using a high-temperature pin on disc tribometer. The experiment…
Purpose The purpose of this paper is to study numerically the effects of heat transfer on the strength of shock waves emitted upon spherical bubble collapse. Design/methodology/approach The motion of bubble under ultrasound is predicted by solutions of the Navier‐Stokes equations for the gas inside a spherical bubble.…
Metal powder slurries were prepared by adding 316L stainless steel powder to a methylcellulose solution. The highly viscous solution, in combination with high particle loadings, hindered powder sedimentation. The efficacy of a dispersant to produce low viscosity slurry was assessed by measuring the torque required to…
We synthesize specially designed latex polymer systems by an in situ emulsion polymerization process that yields latex particles with both a high molecular weight polymer phase and a low molecular weight oligomer phase. The oligomer functions as a plasticizer by lowering the glass transition temperature (T g ) of the…
Through carbothermal reduction and nitridation (CRN) reaction, nitrogen could be fixed into fly ash up to 28 wt %. Nitrided fly ash has the potential to be a source of slow release nitrogen fertilizer. To further investigate this potential, the energy consumptions were estimated for the nitridation process of fly ash.…
Morphology at Intravenous Particle Delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 774 29.5 Local Laser Hyperthermia and Thermolysis of Normal Tissues, Transplanted andSpontaneous Tumors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .…