Materials Literature
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The surface valence transition was observed in the insulating rare-earth compounds which are integral valent in the bulk. From the careful study of Eu $3d,$ Eu $4d$, and Eu $4f$ core-level photoelectron spectra of ${\mathrm{EuF}}_{3},$ ${\mathrm{Eu}}_{2}{\mathrm{O}}_{3},$ and ${\mathrm{EuCl}}_{3},$ we unambiguously id…
We study in detail by means of ab-initio pseudopotential calculations the electronic structure of five-fold coordinated (T_5) defects in a-Si and a-Si:H, also during their formation and their evolution upon hydrogenation. The atom-projected densities of states (DOS) and an accurate analysis of the valence charge distr…
We present a NMR pulse double-irradiation method which allows one to separate magnetic from quadrupolar contributions in the spin-lattice relaxation. The pulse sequence fully saturates one transition while another is observed. In the presence of a Delta m = 2 quadrupolar contribution, the intensity of the observed lin…
The analytical properties of macroscopic transport coefficients of two-component composites are first used to discuss the thermoelectric power factor of such a composite. It is found that the macroscopic power factor can sometimes be greater than the power factors of both of the pure components, with the greatest enha…
Deposition of tin-doped–indium-oxide (ITO) on unheated substrates via low energy processes such as electron-beam deposition can result in the formation of amorphous films. The amorphous-to-crystalline transformation was studied in this system using in situ resistivity, time resolved reflectivity, glancing incidence an…
This article presents an analysis of the response of boron carbide (B4C) to severe loading conditions that produce large strains, high strain rates, and high pressures. Experimental data from the literature are used to determine and/or estimate constants for the JH-2 constitutive model for brittle materials. Because B…
The evolution in microstructure and local crystallography is described, with emphasis on the behaviour of medium to high stacking fault energy FCC metals deformed at low temperature. This evolution is analysed within a common framework of grain subdivision on different size scales. The largest scale is the macroscopic…
Methods of deforming metals to large strains are reviewed and the process of equal channel angular extrusion is analysed in detail. The development of microstructure during large strain deformation is discussed, and it is concluded that the main criterion for the formation of a sub-micron grain structure is the genera…
Bovine aortic endothelial cells were cultured on surfaces grafted with a temperature-responsive polymer, poly(N-isopropylacrylamide) (PIPAAm), in the presence of serum. Cells adhered, spread, proliferated, and reached confluency as observed on ungrafted tissue culture polystyrene dishes. A decrease in culture temperat…
The nitrogen adsorption isotherm measured at 77 K in the relative pressure range from about 5 × 10 - 7 to 0.988 for a macroporous silica is reported in a tabular form. The isotherm data are in good agreement in the high-pressure range with the reference data published by Gregg and Sing and by Kiselev and Aristov and p…
Mit einer Superaustausch-Wechselwirkung über das freie Elektronenpaar des zentralen Stickstoffatoms von 1 läßt sich die Existenz eines Dublett-Grundzustands erklären. Zwei Spins der Aminoxyl-Radikalzentren koppeln antiferromagnetisch, und ein Spin bleibt unverändert. Dieser Vorschlag wird durch ESR-spektroskopische un…
The inverse scattering approach presented here enables the calculation of estimates of top and bottom line width values, sidewall angle, corner rounding, the heights from top-down SEM images or line scans. It also represents a significant step in solving the accuracy problem that plagues CD SEM measurements today. A c…
Ein fünffach koordiniertes Chloridion ist wahrscheinlich das Templat bei der Selbstorganisation eines fünfzehnkernigen Europium(III)-Komplexes. Dieser Cluster (siehe Bild) wurde durch Umsetzung von Europium(III)-perchlorat mit Tyrosin bei pH≈6 hergestellt. Die Einkristall-Röntgenstrukturanalyse zeigt eine neue Struktu…
A superexchange interaction through the lone pair of electrons on the central nitrogen atom in 1 is invoked to explain the existence of a doublet ground state; two spins on the aminoxyl radical centers couple antiferromagnetically, and one spin remains intact. This proposal is supported by EPR spectroscopic and magnet…
We report the synthesis of dense and uniform arrays of well-aligned carbon nanotubes on titanium substrates over large areas, in which all the tubes are simultaneously and completely filled with single crystals of titanium carbide. The carbon nanotubes were synthesized by thermal chemical vapor deposition of ethylene…
Pronounced dendritic effects are shown by the title compound 1 in the recognition of Cl− and Br−—this is shown by the comparison with a mononuclear compound with one dendrimer arm and a trinuclear compound with a tripodal dendrimer branch. Thus, 1 differs distinctly from 24-ferrocene dendrimers of comparable topology.
The first modified analogue of the AII3[BIII(CN)6]2⋅x H2O type of Prussian-Blue, the title compound, has a three-dimensional network structure extended by CrIII-CN-MnII linkages, which is based on a defective cubane unit comprising three Cr and four Mn ions (see structure), and shows ferrimagnetic ordering below 69 K.
Scatterometry is a one of the few types of metrology that has true in-situ potential for deep submicron CD and profile analysis. To date, commercial prototypes have been used to establish scatterometry based on single wavelength, multiple incident angle inspection. We extend this idea by deploying specular spectroscop…
Thermoreversible gels of poly(vinyl alcohol)/Congo red in aqueous solutions have been studied by dynamic light scattering. Below ${T}_{gel}(\ensuremath{\approx}43\ifmmode^\circ\else\textdegree\fi{}\mathrm{C})$, a speckle pattern appeared, while it disappeared for $T>{T}_{gel}$. This indicates that nonergodicity obs…
We have grown epitaxial La2/3Sr1/3MnO3 (LSMO) and La2/3Ba1/3MnO3 (LBMO) thin films as well as La2/3Ba1/3MnO3/SrTiO3 heterostructures by pulsed-laser deposition. The microstructure of the films was analyzed by x-ray diffraction and transmission electron microscopy. A significant effect of strain due to lattice mismatch…