Materials Literature
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We perform a combined experimental and theoretical study of tetramethyltetraselenafulvalene (TMTSF) single-crystal field-effect transistors, whose electrical characteristics exhibit clear signatures of the intrinsic transport properties of the material. We present a simple, well-defined model based on physical paramet…
One more, one less: Radical centers are generated in binary neutral zirconium oxide clusters by replacing one Zr atom in single-metal cationic and anionic clusters with radical oxygen centers by an atom that has one less (Sc) or one more electron (Nb). This study reveals that these isoelectronic systems promote simila…
Completely coupled: The acylation of dimethylamine through coupling to formaldehyde occurs with almost 100 % selectivity at low coverage of adsorbed O atoms on metallic gold and with a low activation energy. Oxygen creates an active intermediate (CH3)2N(a) , which attacks the carbonyl carbon of the aldehyde (see pictu…
In this work we report on the syntheses and properties of several new Ni complexes featuring the chelating bisguanidines bis(tetramethylguanidino)benzene (btmgb), bis(tetramethylguanidino)naphthalene (btmgn), and bis(tetramethylguanidino)biphenyl (btmgbp) as ligands. All complexes were structurally characterized by si…
We demonstrate how droplet templates dispensed on superhydrophobic substrates can be used to fabricate both shape-anisotropic ("doughnut") and composition-anisotropic ("patchy magnetic") supraparticles. The macroscopic shape of the closely-packed particle assemblies is guided by the droplet meniscus. Aqueous droplets…
The super bowl: The dynamic inversion behaviour of [CpRu(η6-sumanene)]PF6 (see picture; sumanene=C21H12) was investigated in solution by NMR studies. This result, the first elucidation of bowl-to-bowl inversion in π-bowl transition metal complexes, is solvent- and temperature-dependent.
In this study, we aimed to dissolve microcrystalline cellulose (MCC) with phosphoric acid to obtain high-quality fermentable saccharides. MCC was directly dissolved in phosphoric acid (the concentration was 83%) for 10 hours at temperatures of 30, 50, and 70 degrees C. The structural changes of MCC were determined in…
We demonstrate a glucose sensor based on an organic electrochemical transistor (OECT) in which the channel, source, drain, and gate electrodes are made from the conducting polymer poly(3,4-ethylenedioxythiophene) doped with poly(styrene sulfonate) (PEDOT:PSS). The OECT employs a ferrocene mediator to shuttle electrons…
The importance of protection against ultraviolet radiation (UV) is increasing daily. The dependence of the UV protection level on different clothes is determined by the shape and design of fabrics, and especially by their construction parameters. The fabric structure represents an important factor which is in most cas…
Using a ZnO nanorod array as the template, vertically aligned CdSe nanotubes have been demonstrated on indium tin oxide (ITO) glass in large scale. The wall thickness of the nanotube is tunable and can be increased until the formation of a continuous porous CdSe network. Detailed morphological and structural character…
The authors report fabrication of tough nanostructured self-cleaning superhydrophobic polymer-organoclay films from anaerobic acrylic adhesives displaying strong adhesion to metal surfaces. Both industrial and bio-grade anaerobic adhesives such as bone cements could be used. Montmorillonite clay filled anaerobic adhes…
Three conjugated copolymers, consisted of alternating p -phenylene-ethynylene and boron di(iso)indomethene units in the backbone, were synthesized via palladium-catalyzed Sonogashira coupling reaction of 1,4-diethynyl-2,5-dihexadecyloxybenzene and three diiodophenyl-fused BODIPY monomers. The structures and properties…
Kondo systems are usually described by the interaction of strong correlation induced local moment with the highly itinerant conduction electrons. Here, we study the role of electron correlations among conduction electrons in the electronic structure of a Kondo lattice compound, Ce$_2$CoSi$_3$, using high resolution ph…
The valley splitting in Si two-dimensional electron systems is studied using Si/SiGe single quantum wells (QWs) with different well widths. The energy gaps for 4 and 5.3 nm QWs, obtained from the temperature dependence of the longitudinal resistivity at the Landau level filling factor $ν=1$, are much larger than those…
We present a first-principles study of native defects in ${\text{NaAlH}}_{4}$. Our analysis indicates that the structure and energetics of these defects can be interpreted in terms of elementary building blocks, which include ${V}_{{\text{AlH}}_{4}}^{+}$, ${V}_{\text{Na}}^{\ensuremath{-}}$, ${V}_{\text{H}}^{+}$, ${\te…
PURPOSE: A new type of in vivo dosimeter, an optically stimulated luminescent dosimeter (OSLD), has now become commercially available for clinical use. The OSLD is a plastic disk infused with aluminum oxide doped with carbon (Al2O3:C). Crystals of Al2O3:C, when exposed to ionizing radiation, store energy that is relea…
It has been demonstrated that the mechanical properties of materials change significantly when external dimensions are confined to the nanoscale. Currently, the dominant fabrication method for mechanical testing specimens with nanometer dimensions is by using focused ion beam (FIB) milling, which results in inevitable…
The effect of water additions, from , to an ammonium fluoride/ethylene glycol electrolyte on the composition and morphology of titania-based nanotubes was investigated by scanning and transmission electron microscopy, Rutherford backscattering spectroscopy, and nuclear reaction analysis. Further to the presence of uni…
We probe, using the surface forces apparatus, the thermal response of poly(N-isopropylacrylamide) (PNIPAM) brushes of various grafting densities, grown from plasma-activated mica by means of surface-initiated polymerization. We thus show that dense thermoresponsive brushes collapse gradually as temperature is increase…
High-resolution x-ray absorption measurements reveal a rare-earth-dependent splitting of the $\text{Ni}\text{ }K$ edge in the insulating, charge-disproportionated state of the whole $R{\text{NiO}}_{3}$ perovskite family. The splitting is five times larger for ${\text{LuNiO}}_{3}$ [2.5(1) eV] than for ${\text{PrNiO}}_{…