Materials Literature
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Transparent conductive CuGaO2 oxide films were prepared on sapphire substrates by the sol-gel method. The highly c-axis orientation and optical transparency (60%-80%) in the visible region were obtained. It indicates that the A1g phonon mode shifts about 20 cm−1 with the temperature due to the thermal expansion of the…
The self-organizing structures formed by a water-soluble perylene diimide dye (PDI) have been studied by several experimental techniques as potential templates for the preparation of hybrid nanomaterials. The dye forms chromonic-nematic and hexagonal liquid crystals in water. The aggregates in liquid crystals consist…
We study CO adsorption on a multilayer catalytic diode in which electron transfer at the metal-semiconductor (Pt/TiO(2)) junction is controlled by an applied external voltage. The multilayer diode structure enhances infrared absorption signals from CO molecules adsorbed on the small area Pt surface. We find that the d…
Biosynthesis of silver Nanoparticles (NPs) using microorganisms has been reported but methodologies of synthesis are slow and the silver nanoparticles are not stable. In this study, an attempt has been made to synthesize the silver nanoparticles (SNPs) within 10 min from Phytophthora infestans and it was found to be s…
In this paper we present the Sylvie three-dimensional (3D) Drape Tester, developed for fabric drape measurements, and its special auxiliary device that exerts dynamical impact on fabrics during draping. In addition, a new draping characteristic, namely the Drape Unevenness Factor, was defined to describe the evenness…
Piezoelectric ceramics in the ternary system (0.8− x ) PbSnO 3 –0.2 Pb(Mg 1/3 Nb 2/3 )O 3 – x PbTiO 3 ( PSn–PMN–PT , x = 0.42–0.47) were synthesized. Morphotropic phase boundary ( MPB ) compositions, located at ~ PT = 0.43–0.45 were confirmed by X‐ray diffraction, dielectric, piezoelectric, and ferroelectric propertie…
Abstract A novel surface modification method for titania nanoparticles is provided via the surface‐initiated photocatalytic polymerization with the aid of acrylic acid (AA) or sodium styrene sulfonate (NaSS). The properties of modified titania nanoparticles are investigated with aqueous electrophoresis measurements, d…
The low- and high-temperature phases of V${}_{4}$O${}_{7}$ have been studied by ab initio calculations. At high temperature, all V atoms are electronically equivalent and the material is metallic. Charge and orbital ordering, associated with the distortions in the V pseudorutile chains, occur below the metal-insulator…
Licht im Dunkel: Dynamische lichtresponsive Polymerfilmtopologien wurden durch den Einbau von Azobenzolvernetzern in flüssigkristalline Polymernetzwerke hergestellt (siehe Bild). Das Funktionsprinzip dieser Filme basiert auf dem Bruch der molekularen Ordnung des flüssigkristallinen Polymernetzwerks. Bei UV-Bestrahlung…
Abstract Self‐propagating high‐temperature synthesis (SHS) can be regarded as an efficient method to obtain new nanomaterials. Different starting mixtures of magnesium powder with various carbonates (Li2CO3, Na2CO3, CaCO3, FeCO3, (NH4)2CO3) were tried and the auto‐thermal reactions were carried out under both reactive…
A novel anionic surfactant-templated synthesis of ZnO/mesoporous silica nanocomposites has been carried out by using N-hexadecylethylenediamine triacetate (HED3A), a triprotic surfactant, as the structure-directing agent. The chelating template can capture zinc ions in solution and then direct the mesophase formation,…
The evolution of the morphology of Ni-oxide nanostructures on Ag(100) as a function of temperature has been followed experimentally by scanning tunneling microscopy (STM) and theoretically by density-functional theory (DFT) calculations. After reactive deposition at room temperature and annealing at 450 K, the NiO(2 \…
Freestanding ultrananocrystalline diamond (UNCD) films with homojunction insulating layer in situ grown on a conducting layer showed superior electron field emission (EFE) properties. The insulating layer of the films contains large dendrite type grains (400-600 nm in size), whereas the conducting layer contains nanos…
AP7 is a nacre-associated protein of the mollusk shell that forms supramolecular assemblies that nucleate single-crystal aragonite in vitro. AP7 possesses two major sequence regions: a random coil 30-amino acid N-terminal domain (AP7N) and a partially disordered 36-amino acid C-terminal domain (AP7C) that exhibits imp…
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Perovskite-type KNbO 3 could be synthesized at low temperature (<600 °C) via a modified solid-state reaction method in which urea played an important role. The synthetic mechanism of KNbO 3 via the modified solid-state reaction process has been studied by high-temperature X-ray diffraction (HT-XRD), thermogravimetry/d…
Ein natürlicher ultradünner flexibler Panzer: Neuartige hierarchische Mikrostrukturen aus dicht gepackten helicalen Aragonitnanofasern wurden in einer ultradünnen Flügelschneckenschale nachgewiesen. Die helicalen Nanofasern sind verzahnt und kristallographisch bis 10° fehlorientiert. Diese Strukturmerkmale tragen even…
Five new triply bridged dinuclear Cu(II) compounds have been synthesized, and their magnetic properties have been measured and characterized. The magnetic coupling constants (J) of these compounds plus a previously structurally characterized compound of the same type have been derived by appropriate fitting of the exp…
Periodic mesoporous hydridosilica, PMHS, is shown for the first time to function as both a host and a mild reducing agent toward noble metal ions. In this archetypical study, PMHS microspheres react with aqueous Ag(I) solutions to form Ag(0) nanoparticles housed in different pore locations of the mesostructure. The do…
AIMS: The extracellular pH of cancer cells is lower than the intracellular pH. Weakly basic anticancer drugs will be protonated extracellularly and display a decreased intracellular concentration. In this study, we show that copolymeric nanoparticles (NPs) are able to overcome this "pH-induced physiological drug resis…