Materials Literature
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The prediction of ferromagnetism at room temperature in Co-ZnO thin films has generated a large interest in the community due to the possible applications. However, the results are controversial, going from ferromagnetism to non-ferromagnetism, leading to a large debate about its origin (secondary phase, Co clusters o…
By analyzing the dielectric nonlinearity with the Landau thermodynamic expansion, we find a simple and direct way to assess the importance of the eighth-order term. Following this approach, it is demonstrated that the eighth-order term is essential for the adequate description of the paraelectric-ferroelectric phase t…
We have investigated the in-plane thermal conductivity $κ_{ab}(T,H)$ of large single crystals of optimally oxygen-doped (Y$_{1-x}$,Sm$_{x}$)Ba$_{2}$Cu$_{3}$O$_{7-δ}$ ($x$=0, 0.1, 0.2 and 1.0) and YBa$_{2}$(Cu$_{1-y}$Zn$_{y}$)$_{3}$O$_{7-δ}$($y$=0.0071) as functions of temperature and magnetic field (along the c axis).…
The free energies of the FCC, BCC, HCP and Simple Cubic phases for hard spheres are calculated as a function of density using the Fundamental Measure Theory models of Rosenfeld et al (PRE 55, 4245 (1997)), Tarazona (PRL 84, 694 (2001)) and Roth et al (J. Phys.: Cond. Matt. 14, 12063 (2002)) in the Gaussian approximati…
We present an ab initio study of electronic correlation effects in a molecular cluster derived from the hexanuclear ferric wheel [LiFe6(OCH3)12-(dbm)6]PF6. The electronic and magnetic properties of this cluster have been studied with all-electron Hartree-Fock, full-potential density functional calculations and multi-r…
This paper has been withdrawn by the author(s), due to incompleteness.
Abstract Why do experiments detect Cosserat-elastic effects for porous, but not for stiff-particle-reinforced, materials? Does homogenization of a heterogeneous Cauchy-elastic material lead to micropolar (Cosserat) effects, and if so, is this true for every type of heterogeneity? Can homogenization determine micropola…
Nanoporous silica nanofibers have been employed as a matrix to encapsulate horseradish peroxide enzymes via a simple electrospinning method. A viscous solution of prehydrolyzed tetramethyl orthosilicate, beta-d-glucose, poly(vinyl alcohol), and enzymes were employed as spinning solution to generate porous fibers in th…
It is now possible to synthesize polycrystalline metals made up of grains that average less than 100 nm in size. Such nanocrystalline metals contain a significant volume fraction of interfacial regions separated by nearly perfect crystals. The small sizes involved limit the conventional operation of dislocation source…
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Based on allosteric regulatory properties, NAD+-specific isocitrate dehydrogenase (IDH) is believed to control flux through the tricarboxylic acid cycle in vivo. To distinguish growth phenotypes associated with regulatory dysfunction of this enzyme in Saccharomyces cerevisiae, we analyzed strains expressing well defin…
Determination of a suitable cryoprotectant agent condition is one of the time-consuming processes in protein X-ray crystallography. The adaptability of two novel versatile cryoprotectants (oil- and water-based types) has been evaluated by cryodiffraction experiments using crystals of five different proteins. The resul…
We report the synthesis and physical characterization of a new family of peripherally functionalized porphyrazine (pz) compounds, denoted 1[M1, M2], where metal ion M1 is incorporated into the pz core and metal ion M2 is bound to a salicylidene/picolinamide "hybrid" chelate built onto two nitrogen atoms attached to th…
We report the first practical results on design and characterization of adaptive microbolometers with a thermally tuned responsivity. Such devices are needed to simultaneously image scenes that contain objects at ambient and extremely hot temperatures. In the high detectivity state, the microbolometers are operated si…
We developed a novel fabrication method of a reduced wavelength-dependent quarter-wave plate (QWP) based on form birefringence of a multilayered subwavelength structure. The multilayered structure was constructed by depositing a high-refractive-index thin film on a subwavelength-structured substrate with a low refract…
We study the temperature dependence of the single particle spectral function as well as the dynamical spin and charge structure factors for the one-dimensional Hubbard model using the finite temperature auxiliary field quantum Monte Carlo algorithm. The parameters of our simulations are chosen so to at best describe t…
A new ferroelectric, ${[\mathrm{C}{(\mathrm{N}{\mathrm{H}}_{2})}_{3}]}_{4}{\mathrm{Br}}_{2}\mathrm{S}{\mathrm{O}}_{4}$, has been characterized by dielectric, calorimetric and dilatometric methods, and its paraelectric and ferroelectric structures determined by x-ray diffraction. The crystal undergoes the first-order f…
We report the preparation of mesoporous aluminosilicate materials that exhibit molecular-scale ordering in their pore wall framework. The materials were derived from mesoporous aluminosilica-surfactant mesophases via benign template removal methods, which allowed the retention of molecular ordering in surfactant-free…
OBJECTIVES: Vasovist (EPIX Pharmaceuticals and Schering AG) is a newly developed blood pool contrast agent for magnetic resonance imaging with a high affinity for human albumin, making it an ideal tool for the detection of structural abnormalities such as stenosis and aneurysm. For the risk assessment of the single di…
Ein Herz aus Gold: 2-nm-Au-Nanopartikel (blaue Kugeln im Bild) mit einer Hülle aus Alkanthiolen, die teilweise mit Alkoxysilan-Gruppen funktionalisiert sind, wurden in eine „offene Schale“ aus Siliciumdioxid eingeschlossen. Durch Calcinieren dieses Dreikomponentenmaterials entstand ein Katalysator für die CO-Oxidation…