Materials Literature
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Preparations, crystal structure analyses, and magnetic property investigations on a new Cu(II)(hfac)2 complex coordinated with two TTF-CH═CH-BTA ligands, where hfac is hexafluoroacetylacetonate, TTF is tetrathiafulvalene, and BTA is 1,3-benzothiazole, are reported together with those of its dicationic AsF6(-) salt, [C…
ABSTRACT The microstructure of poly(1,3‐pentadiene) synthesized by cationic polymerization of 1,3‐pentadiene with tBuCl/TiCl4 initiating system is analyzed using one‐dimensional‐ and two‐dimensional‐NMR spectroscopy. It is shown that unsaturated part of chain contains only homo and mixed dyads with trans−1,4‐, trans−1…
We compare key properties of zinc oxide (ZnO)-based junction field-effect transistors (JFETs), metal-semiconductor field-effect transistors (MESFETs), and metal-insulator-semiconductor field-effect transistors (MISFETs) prepared from a common ZnO:Mg thin film. The JFETs are fabricated with a ZnCo2O4-gate, the MESFETs…
Recent developments in consumer electronics, e.g. smartphones, tablet PCs or compact cameras, demand the development of very compact, active, optical microsystems. Because of their low power consumption, low operation voltage and cheap fabrication, voltage-controlled electrochromic devices (ECDs) based on polymer mate…
Heparin conjugation on poly(L-lactide) fibrous scaffolds fabricated by electrospinning was accomplished by surface functionalization with amine (-NH2) groups using a sequential treatment with Ar-NH3 and H2 plasmas. The density of the incorporated -NH2 groups was determined by combining a chemical derivatization method…
In this study, a boron added armor steel was developed according to standard rolled homogenous armor steel, MIL-A-12560, and metallographic-fractographic examinations were carried out to understand its deformation characteristics and perforation mode after interaction with a 7.62 nun armor piercing projectile. The mic…
Six-coordinate tetracyanidonitridorhenium(V) and -technetium(V) with axial N-heteroaromatic ligands, (PPh4)2[MN(CN)4L] [M = Re, L = 4-(dimethylamino)pyridine (dmap), 3,5-lutidine (lut), 4-picoline (pic), 4-phenylpyridine (ppy), pyridine (py), 3-benzoylpyridine (3bzpy), 4,4'-bipyridine (bpy), pyrazine (pz), 4-cyanopyri…
ABSTRACT Triblock copolymers with surface‐active properties, referred to as Pluronic, have shown potential medical applications such as drug delivery to selective targets in the human body. In particular, the transport of anti‐inflammatory substances to the brain is required for illness treatment, thus the study of de…
Helicobacter pylori is a bacterium that can use multiple iron sources. However, it is unknown whether this bacterium secretes molecules such as siderophores or haemophores to scavenge iron. Here, we report the first secreted iron-binding protein of H. pylori, which we purified by haem-affinity chromatography. Mass spe…
We investigate non-Brownian particles suspended in a periodic shear-flow using simulations. Following Metzger and Butler [Phys. Rev. E 82, 051406 (2010)], we show that the chaotic dynamics arising from lubrication interactions are too weak to generate an observable particle dispersion. The irreversibility observed in…
An analytical model of the small-signal current and capacitance characteristics of radio frequency graphene field-effect transistors (GFETs) is presented. The model is based on explicit distributions of chemical potential in graphene channels (including ambipolar conductivity at high source-drain bias) obtained in the…
Pyrochlore-type Bi 2– x La x Sn 2 O 7 (0.0 ≤ x ≤ 0.20) system has been explored for its facile synthesis and electrical and photocatalytic functionalities. The highly distorted α-polymorph of Bi 2 Sn 2 O 7 was synthesized, and successive La 3+ substitutions were found to increase the lattice symmetry. Electric field d…
The temperature sensing capability of diphenylalanine nanotubes is investigated. The materials can detect local rapid temperature changes and measure the absolute temperature in situ with a precision of 1 °C by monitoring the temperature-dependent photoluminescence (PL) intensity and lifetime, respectively. The PL lif…
Recombinant proteins are used routinely in macromolecular crystallographic experiments. Efficiency in cloning thus becomes a valuable resource to a macromolecular crystallographer. The use of type IIS restriction enzymes (outside cutters) concurrent with ligation allows for rapid cloning. A vector can be modified easi…
Silicene, the silicon analogous of graphene, is a newly synthesized two-dimensional nanomaterial, with unique features and promising potential applications. In this paper we present density functional theory calculations of the organic functionalization of hydrogenated silicene with acetylene, ethylene, and styrene. T…
ABSTRACT A novel rigid poly(vinyl chloride) (PVC)/acrylonitrile–styrene–acrylate (ASA) copolymer blend with good ultraviolet (UV) irradiation resistance and toughness was reported. ASA with good weatherability and toughness was mixed with PVC by conical twin‐screw extruder to improve the UV irradiation resistance and…
In this paper, we present a new post-CMOS-compatible piezoelectric thin/thick film technology that allows wafer-level integration of bulk piezoelectric ceramics such as lead zirconium titanate (PZT) and lead magnesium niobate-lead titanate (PMN-PT) on silicon substrates with precisely determined final film thickness o…
Unusual visible absorption properties of [core+exo]-type Au6 (1), Au8 (2), and Au11 (3) clusters were studied from experimental and theoretical aspects, based on previously determined crystal structures. Unlike conventional core-only clusters having no exo gold atoms, these nonspherical clusters all showed an isolated…
In specific solid-state materials, under the right conditions, collections of magnetic dipoles are known to spontaneously form into a variety of rather complex geometrical patterns, exemplified by vortex and skyrmion structures. While theoretically, similar patterns should be expected to form from electrical dipoles,…
Photochemie: Mehrere Gold(III)-Komplexe mit Fluoren-haltigen Liganden sind stark phosphoreszent (Emissionsquantenausbeuten 58 %) und weisen langlebige angeregte Zustände mit Lebensdauern von 305 μs auf. Die Komplexe dienen als Sensibilisatoren für die Energieaufkonversion von 9,10-Diphenylanthracen (DPA; siehe Bild) u…