Materials Literature
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Hybrid plasmonic-magnetic nanoparticles possess properties that are attractive in bioimaging, targeted drug delivery, in vivo diagnosis, and therapy. The stability and toxicity, however, of such nanoparticles challenge their safe use today. Here, biocompatible, SiO 2 -coated, Janus-like Ag/Fe 2 O 3 nanoparticles are p…
Here we report a remarkable transformation of carbon nanotubes (CNTs) to nanoribbons composed of a few layers of graphene by a two-step electrochemical approach. This consists of the oxidation of CNTs at controlled potential, followed by reduction to form graphene nanoribbons (GNRs) having smooth edges and fewer defec…
Solution-phase photocatalytic reduction of graphene oxide to reduced graphene oxide (RGO) by titanium dioxide (TiO 2 ) nanoparticles produces an RGO-TiO 2 composite that possesses enhanced charge transport properties beyond those of pure TiO 2 nanoparticle films. These composite films exhibit electron lifetimes up to…
Metamaterial absorbers have attracted considerable attention for applications in the terahertz range. In this Letter, we report the design, fabrication, and characterization of a terahertz dual band metamaterial absorber that shows two distinct absorption peaks with high absorption. By manipulating the periodic patter…
While crystalline two-dimensional materials have become an experimental reality during the past few years, an amorphous 2D material has not been reported before. Here, using electron irradiation we create an sp2-hybridized one-atom-thick flat carbon membrane with a random arrangement of polygons, including four-member…
In this study, we analyzed the frequency spectrum of the electromagnetic waves radiated by an electric discharge as a basic method for developing an on-line diagnostic technique for power equipment installed inside closed-switchboards. In order to simulate local and series discharges caused by an electric field concen…
Different mask models have been compared: rigorous electromagnetic field (EMF) modeling, rigorous EMF modeling with decomposition techniques and the thin mask approach (Kirchhoff approach) to simulate optical diffraction from different mask patterns in projection systems for lithography. In addition, each rigorous mod…
Abstract In this work, monomeric molecules (BODIPY) 4,4‐difluoro‐1,2,3,5,7‐pentamethyl‐6‐ethyl‐4‐bora‐3 a ,4 a ‐diaza‐ s ‐indacene ( 1 ), 4,4‐difluoro‐1,7‐dimethyl‐2,3,6‐terethyl‐8‐(4‐tolyl)‐4‐bora‐3 a ,4 a ‐diaza‐ s ‐indacene ( Ph1 ), dimeric monomers (bisBODIPY) 2 , Ph2 , and their packing systems were taken as calc…
The domain closure associated with the catalytic cycle is described at an atomic level, based on pairwise comparison of the X-ray structures of homodimeric Thermus thermophilus isopropylmalate dehydrogenase (IPMDH), and on their detailed molecular graphical analysis. The structures of the apo-form without substrate an…
The mechanisms of deformation and failure in face-centered cubic (FCC) nickel nanowires subjected to uniaxial tensile loading are investigated using molecular dynamics (MD) simulation, and the size effect on mechanical properties of FCC metal nanowires is studied. Simulation reveals that the surface free energy has gr…
Highly branched structure has the essential influence on macromolecular property and functionality in physics and chemistry. In this work, we proposed a diffusion-limited reaction model with the consideration of macromolecular unit relaxations and substitution effect of monomers to study the structure of hyperbranched…
Abstract The aim of the study was to isolate and identify an acetic acid bacterial strain having high cellulose yield and to investigate some physicochemical properties of bacterial cellulose (BC). Acetic acid bacteria were isolated by using 62 samples (vinegar, fruit, vegetable, and soil) from different region of Tur…
Abstract Poly(vinyl alcohol) (PVA)/boehmite nanocomposite (precursor) nanofibers were formed by electrospinning using a PVA aqueous solution of dispersed boehmite nanoparticles as the spinning solution. The alumina nanofibers were obtained by calcination of the precursor nanofibers between 500 and 1200°C. The specific…
We report measurements and analysis of magnetization, resistivity, and thermopower of polycrystalline samples of the perovskite-type Co/Rh oxide La${}_{0.8}$Sr${}_{0.2}$Co${}_{1\ensuremath{-}x}$Rh${}_{x}$O${}_{3\ensuremath{-}\ensuremath{\delta}}$. This system constitutes a solid solution for a full range of $x$, in wh…
Rice straw (RS) and sawdust (SD) were evaluated for the manufacturing of fiber-cement bricks. The utilization of these bio-wastes will contribute to the reduction of the environmental impact of waste disposal. Pre-treating the fiber wastes, mechanically and/or chemically, was carried out before mixing them with cement…
Nanostructured, and regularly patterned, noble metal films are used in many sensor devices, light emitters, and photovoltaic devices because the nanostructure patterns can be designed and fabricated to support surface plasmon resonances (SPRs) with specific energies and desirable spatially localized electromagnetic fi…
The decomposition of Ba(NO 3 ) 2 formed on BaO/Pt(111) (Pt(111) surface is partially covered by BaO) in the presence of CO was studied using temperature-programmed desorption, infrared reflection absorption, and X-ray photoelectron spectroscopies. The exposure of BaO/Pt(111) to elevated NO 2 pressure (1.0 × 10 −4 torr…
Electric conductivity measurements indicated that microviscosities of poly(vinyl alcohol), PVA, solutions [up to 10% (w/w)] are comparable to that of pure water (contrary to Walden's rule), but are different (25%) from those determined from diffusion-controlled reaction measurements that coincide with the values obtai…
Batch-fabricated SiC nanowires (NWs) and SiC@C nanocables (NCs) were heated under an argon flow at high temperature (1600−1800 °C). The ensuing product was characterized by SEM, HRTEM, EDX and XRD. As we found, the heat treatment led to the structuring of SiC NWs, whereas SiC@C NCs were completely converted into carbo…
Concentrated water−alkaline solutions of sodium and potassium borohydrides are used as a fuel and hydrogen source in hydrogen power engineering, including low-temperature fuel cells; borohydrides convert into metaborates. The performance of fuel mixtures is determined by their solubility in water. A general analysis o…