Materials Literature
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Electron-energy-loss spectroscopy (EELS) has been used to study the element contents of the grains in the bulk polycrystalline ${\mathrm{La}}_{1\ensuremath{-}x}{\mathrm{Ag}}_{x}\mathrm{Mn}{\mathrm{O}}_{3}$ ceramic samples prepared by conventional solid-state reaction process in air. Only characterized core-shell ioniz…
Polymersonden leuchten auf: Amplifizierende fluoreszierende, mit Biomolekülen konjugierte Polymere sind ausgezeichnete Lichtsammler und Superquencher (siehe Schema). Eine neuartige Synthese ermöglicht die hoch effiziente, einfache, schnelle und leicht zu steuernde Konjugation eines wasserlöslichen Poly(phenylenethinyl…
We show the effect of mechanical quenching on the thermodynamic state of an inorganic glass, i.e., calcium metaphosphate glass, measured using differential scanning calorimetry (DSC). The calcium metaphosphate glasses were isothermally stretched at a given stress; and then cooled slowly. Afterwards the glasses are sub…
It has been suggested that high-density amorphous (HDA) ice is a structurally arrested form of high-density liquid (HDL) water, while low-density amorphous ice is a structurally arrested form of low-density liquid (LDL) water. Recent experiments and simulations have been interpreted to support the possibility of a sec…
The structural and magnetic properties of NiMnSb films, 5–120 nm thick, grown on InGaAs/InP(001) substrates by molecular-beam epitaxy, were studied by x-ray diffraction, transmission electron microscopy (TEM), and ferromagnetic resonance (FMR) techniques. X-ray diffraction and TEM studies show that the NiMnSb films ha…
Liquid crystalline (LC) ionomers containing azobenzene mesogens and three transition metal ions (Cu 2+, Zn 2+, and Mn 2+ ) were prepared and characterized. Metal ions were found to exert significant effects on the photoinduced orientation of azobenzene mesogens and on the diffraction efficiency of holographic gratings…
In this paper, the adsorption energy of an acicular (prolate and cylindrical) particle onto a liquid-fluid interface and the effect of the line tension are investigated. The results show that, without line tension, acicular particles always prefer to lie flat in the plane of the interface. However, line tension plays…
The new trichlorosilane 2,6-Et 2 C 6 H 3 N(SiMe 3 )SiCl 3 ( 2 ) on controlled hydrolysis yields 2,6-Et 2 C 6 H 3 N(SiMe 3 )Si(OH) 3 ( 3 ). X-ray diffraction analysis of 3 reveals a rare structure type of aggregation where eight molecules of the silanetriol form an octameric cage through intermolecular O−H···O hydrogen…
We described the photoluminescence (PL) properties of individual micelle-encapsulated single-walled carbon nanotubes (SWNTs) at room temperature. Single PL peak from isolated individual SWNT with a chiral index of (6, 5) showed a linear increase and saturation behavior of the PL intensity. Unusual PL intensity fluctua…
Continuum analysis and molecular simulations are carried out to study the adhesion between two identical single-walled carbon nanotubes. A critical radius Rmin=D∕Wflat is found below which the contact area is zero, where D is the effective bending stiffness of the nanotube, and Wflat is the work needed to separate two…
We show, in this paper that multivalent ferrocyanide anions can penetrate into exponentially growing (PGA/PAH)n multilayer films whatever the nature of the last deposited layer. These ions are not able to diffuse out of the film when it is brought in contact with a pure buffer solution. However, the contact of this fi…
This paper reports on Hall effect and resistivity measurements under high pressure up to 3--4 GPa in $p$-type $\ensuremath{\gamma}$-indium selenide (InSe) (doped with As, Cd, or Zn) and $\ensuremath{\epsilon}$-gallium selenide (GaSe) (doped with N or Sn). The pressure behavior of the hole concentration and mobility ex…
▪ Abstract Chemical analysis at high spatial resolution is the domain of analytical transmission electron microscopy. Owing to rapid instrumental developments during the past decade, electron energy-loss spectroscopy offers now a spatial resolution close to 0.1 nm and an energy resolution close to 0.1 eV. This develop…
The conditions for synthesizing microtubes with a surface of "house of cards" structure via needlelike particles were examined in detail. Magnesium carbonate trihydrate was formed as a metastable phase in the reaction process using magnesium hydroxide and carbon dioxide as starting materials. Subsequently, in the form…
Magnetoresistance (MR) measurements up to 50 T have been performed in the half-metallic polycrystalline ${({\mathrm{Ba}}_{0.8}{\mathrm{Sr}}_{0.2})}_{2}{\mathrm{FeMoO}}_{6}$ double perovskite in the temperature range 4.2 K--350 K. At temperatures far below ${T}_{C}(=345\phantom{\rule{0.3em}{0ex}}\mathrm{K})$ the MR is…
Study of the perovskite-type manganites Ca 1 - x Ce x MnO 3 (0.00 ≤ x ≤ 0.25) has been carried out. The electrical resistivity values for these samples were measured in the temperature range from 300 up to 900 K and show that the doping of the phase CaMnO 3 with cerium induces simultaneously a marked decrease in the e…
Using site-specific soft x-ray emission and absorption spectroscopy in conjunction with site-specific x-ray photoelectron spectroscopy, we present measurements of the valence and conduction band states of NiO. Significant hybridization between the Ni and the O electronic states near the Fermi energy is observed throug…
PURPOSE: To compare atherosclerotic plaque uptake of a first (ferumoxtran-10) and second generation (ferumoxytol) ultrasmall superparamagnetic iron oxide (USPIO) contrast agent with different pharmacokinetic/pharmacodynamic properties. MATERIALS AND METHODS: New Zealand White rabbits maintained on a high cholesterol/f…
▪ Abstract In recent years substantial progress has been made in the control of the properties of porous materials on the nano-, meso-, and macroscale. The feature of solids can, in favorable cases, be tailored to such an extent that one is justified in using the term engineering of porous catalytic materials. This re…
The structure and the solidification of gold nanoparticles in a carbon nanotube are investigated using molecular dynamics simulations. The simulations indicate that the predicted solidification temperature of the enclosed particle is lower than its bulk counterpart, but higher than that observed for clusters placed in…