Materials Literature
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To gain insight into the effects of liquid-liquid phase separation on molecular relaxation behavior we have studied an apparently homogeneous mixture of 5-methyl-2-hexanol and isoamylbromide by dielectric spectroscopy over a broad temperature range. It shows two relaxation regions, widely separated in frequency and te…
Palladium-doped double-walled silica nanotubes (SNTs) were synthesized by sol−gel transcription, and H 2 adsorption experiments were carried out at 298 K. The H 2 -storage capacities of the palladium-doped SNTs were 0.15 wt % for SNT-5, 1.90 wt % for SNT-10, and 0.75 wt % for SNT-15, showing that the palladium-doped t…
Informationsübertragung: Ein Hybridgel aus π-konjugierten Oligo(p-phenylenvinylen)-Bändern (OPV1 und OPV2) und Goldnanopartikeln wurde in Toluol mithilfe nichtkovalenter Wechselwirkungen aufgebaut (siehe Bild). Die enge Nachbarschaft der Metallpartikel zu den π-konjugierten Molekülen führt zu einer Übertragung von ele…
A new intermediate temperature mixed conducting material has been fabricated based on acceptor doping of bismuth ferrite (BiFeO 3 ). Acceptor doping at levels of 5 mol % with either Ca or Sr was found to increase the maximum operating temperature of ceramics by more than 100 °C as well as eliminate secondary phase for…
The aging dynamics after shear rejuvenation in a glassy clay suspension have been investigated through dynamic light scattering (DLS). Two different aging regimes are observed: one is attained if the sample is rejuvenated before its gelation and one after the rejuvenation of the gelled sample. In the first regime, the…
A space elevator is a tall tower rising from a point on the Earth’s equator to a height well above a geostationary orbit, where it terminates in a counterweight. Although the concept is more than a century old, it was only with the discovery of carbon nanotubes that it began to receive serious scientific attention. NA…
Die Farben des Regenbogens: Ein poröses Polymergel schaltet unter Lichteinstrahlung bei einer festgelegten Temperatur schnell zwischen zwei Farben (siehe Bild; „an“: mit UV-Bestrahlung, „aus“: im Dunkeln). Diesem Schaltprozess unterliegt ein Wechsel zwischen zwei Volumenzuständen. Da die Temperatur das Ausmaß des Quel…
The spin-resolved electronic structure of AlN doped with 6.25% Cu has been studied by first-principles calculations based on spin density functional theory. A single substitutional Cu impurity and its nearest neighbouring N atoms have a spin polarized state with a global magnetization of 2.00 μ B . Band structures sho…
The elastic properties of fcc crystals consisting of charge stabilized colloidal particles are determined from real space imaging experiments using confocal microscopy. The normal modes and the force constants of the crystal are obtained from the fluctuations of the particles around their lattice sites using the equip…
It is important to study the hydrogen-bonding character in hydrophilic polymers in detail to create new hydrophilic synthetic polymers controlled by hydration. In this paper, the role of hydroxyl side chains in sericin, a gluelike hydrophilic protein of Bombyx mori cocoon, in forming stable β-sheet aggregates is studi…
The plasmon oscillations in a cluster of two nearly touching metallic nanospheres are studied. Simple analytical expressions have been found for the spectra of plasmon oscillations of different symmetry. A type of plasmon oscillations (``plasmonic molecule'') which are strongly localized between the spheres and which…
Phase evolution, microstructure and dielectric behaviour of Li and Ta codoped NiO (LTNO) ceramics were studied. The content of Ta 2 O 5 was mainly dispersed into the grain boundaries and exists as the NiTa 2 O 6 phase. The concentration of Ta has a remarkable effect on the dielectric properties of the LTNO ceramics. T…
In order to facilitate a novel means for coupling proteins to metal oxides, peptides were identified from a dodecamer peptide yeast surface display library that bound a model metal oxide material, the C, A, and R crystalline faces of synthetic sapphire (alpha-Al(2)O(3)). Seven rounds of screening yielded peptides enri…
ABSTRACT Sensory evaluation of tactile properties of fabrics is a subject many researchers have studied for years and which still has importance and is also open to improvements. Particularly for suitings, the sensory evaluation of fabric handle or of other tactile properties has a greater importance. This article exp…
A series of wheat-gluten-based nanocomposites were produced by dispersing Cloisite-30B nanoclay particles into plasticized wheat gluten systems under thermal processing conditions. The exfoliation of the nanoparticles as confirmed by wide-angle X-ray diffraction and transmission electron microscopy has resulted in sig…
Raman excitation profiles are obtained and compared for carbon nanotube radial breathing mode (RBM) fundamental and overtone vibrations for 5 specific chiralities. Fitting of the Raman excitation data is performed using Raman transform theory. The Huang-Rhys factors obtained from the modeling are directly related to t…
The crystal structure of an active site mutant of pro-Tk-subtilisin (pro-S324A) from the hyperthermophilic archaeon Thermococcus kodakaraensis was determined at 2.3 A resolution. The overall structure of this protein is similar to those of bacterial subtilisin-propeptide complexes, except that the peptide bond linking…
From the reaction of in situ generated 1,2-di(4-tert-butylphenyl)ethylene-1,2-dithiol, 2LH2, and Na[AuCl4].2H2O in 1,4-dioxane, green brown crystals of diamagnetic [N(n-Bu)4][AuIII(2L)2] (1) were obtained. As shown by cyclic voltammetry, 1 is a member of an electron-transfer series comprising the dianion [AuII(2L)2]2-…
Several studies have recently reported the use of monofunctional octahedral oligomeric silsesquioxanes (monofunctional POSS) to modify polymer networks. In most of these studies the final material is depicted as a network with pendent POSS units randomly dispersed in the structure. The aim of this paper is to show tha…
We use first-principles density functional theory calculations to investigate the strongly nonlinear compositional trends in ferroelectric BiBO3-PbTiO3 solid solutions for a variety of cations on the perovskite B site. We demonstrate that previously tabulated crystal chemical parameters (extracted from other Pb-based…