Materials Literature
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We examine the performance limits of field-effect transistors (FETs) with chemically modified graphene as the channel materials. Graphene nanoroad (XNR) and graphene nanomesh (XNM) can be created through selective chemical modification by an X adsorbate (either H or F) on graphene, which generates a bandgap while cons…
Chemical modification of Douglas fir bark and its subsequent utilization in adsorption of Pb(II) from aqueous solutions was investigated. The polysaccharidic moiety of barks was functionalized by periodate oxidation and derivatized after reductive amination in the presence of aminated oligo-carrageenans. Pb(II) adsorp…
FT-IR and Raman spectra of the orthorhombic and monoclinic N-benzyl-2-methyl-4-nitroaniline (BNA) single crystals, powders, and BNA solutions were measured in the 15-4000 cm(-1) range, and complete assignments of bands to normal vibrations are proposed. The assignments have been reinforced by density functional theory…
Iridescence is a property of structural color that is occasionally encountered in higher eukaryotes but that has been poorly documented in the prokaryotic kingdom. In the present work, we describe a marine bacterium, identified as Cellulophaga lytica, isolated from the surface of an anemone, that exhibits bright green…
Doped strontium titanates are very versatile materials. Iron doped SrTiO 3 can be used, for example, as a material for resistive gas sensors and fuel cell electrodes. In this paper, two compositions based on Fe doped SrTiO 3 were studied as possible candidates for cathode application in SOFCs. Namely, SrTi 0.65 Fe 0.3…
INTRODUCTION: Docetaxel and paclitaxel are among the most active agents for the treatment of breast cancer. These first-generation taxanes are extremely hydrophobic; therefore, solvents are needed for its parenteral administration. Albumin nanoparticle technology allows for the transportation of such hydrophobic drugs…
Gold (Au) nanoparticles, particularly nanorods, are actively employed as imaging probes because of their special nonblinking and nonbleaching absorption, scattering, and emitting properties that arise from the excitation of surface plasmons. Herein, we report a novel sensing method that detects feature orientation at…
In their publication [Phys. Rev B, 84, 245125 (2011)], Ishioka et al. discuss the recently discovered chiral charge density wave state in 1T-TiSe2 in terms of a parameter H_CDW, whose sign is suggested to correspond to the handedness of the chiral order. Here we point out that H_CDW, as defined by Ishioka et al., cann…
Monte Carlo simulations of hard-sphere (HS) crystal grown on a square patterned wall under gravity have been performed. While previous simulations were performed with step-wise controlled gravity, in the present simulations constant gravity has been applied from the first. In the case in which a flat wall is used as t…
In this paper we study the excitation spectrum of graphene in a strong magnetic field, beyond the Dirac cone approximation. The dynamical polarizability is obtained using a full $π$-band tight-binding model where the effect of the magnetic field is accounted for by means of the Peierls substitution. The effect of elec…
We study disorder effects on the surface states of the topological insulator Bi$_2$Se$_3$ close to the topologically protected crossing point. Close to charge neutrality, local fluctuations in carrier density arising from the random charged disorder in the environment result in electron and hole puddles that dominate…
We have synthesized the intermetallic YPrFe17 compound by arc-melting. X-ray and neutron powder diffraction show that the crystal structure is rhombohedral with View the MathML source space group (Th2Zn17-type). The investigated compound exhibits a broad isothermal magnetic entropy change ΔSM(T) associated with the fe…
Electroanalytical methods or electroanalysis have several advantages over other analytical methods. They offer competitive characteristics such as low cost, fast response, easy automation, miniaturization, portability, the ability to monitor in-situ and in real time, and no need for sample manipulation. They are based…
Low-pressure-sensitive composites using multi-walled carbon nanotubes as a conductive filler and poly(dimethylsiloxane) as a polymer matrix have been fabricated, and their electrical and piezoresistive properties have been studied. A large aspect ratio of the MWCNTs was used to achieve good electrical properties of th…
Abstract Der Transportmechanismus von mittels Platin‐Katalysator aktiviertem Sauerstoff wurde mit einem System aus Nanopartikeln‐Schichten (Sandwichstruktur) untersucht. Die Ergebnisse zeigen, dass die aktivierte Sauerstoffspezies über die Gasphase transportiert wird, und dass der bisher allgemein akzeptierte Oberfläc…
Unambiguous evidence of negatively charged excitons (trions) in ZnO/(Zn,Mg)O quantum wells is provided by magneto-optical studies. Distinct features are detected both in transmission and photoluminescence with a spectral width clearly below the trion binding energy of 13 meV. The magnetic-field-induced circular polari…
Abstract The sol–gel technique was used to reinforce isoprene rubber (IR) by generating silica in situ from tetraethoxysilane (TEOS). The aim of the research was to elucidate the effect of the preparation conditions on the structural and morphological characteristics of silica and the resulting mechanical reinforcemen…
2-(2,2′ : 6′,2″-Terpyridin-4′-yl)phenol has been prepared with an improved one-pot method. The reaction between the ligand and MnCl2 in ethanol at ambient or hydrothermal conditions afforded dichlorido[2-(2,2′ : 6′,2″-terpyridin-4′-yl)phenol-κ3 N,N′,N″]manganese(II) and dichloridobis[µ-2-(2,2′ : 6′,2″-terpyridin-4′-yl…
Abstract This study introduces a novel biodegradable material produced from processing cellulose and regenerating it in aqueous high‐molecular‐weight polyethylene oxide (PEO). X‐ray diffraction and transmission electron microscopic analysis show that the blend is highly amorphous and contains a networked structure of…
Abstract In this study, the preparation, properties, and characterization of thin films or “nanopapers” of carbon nanofibers (CNFs) were studied. Specifically, a layer‐by‐layer nanopaper preparation method was used, which significantly improved the mechanical properties of nanopapers. The effect of CNF nanopaper on th…