Materials Literature
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Dislocation densities, arrangements and long range internal stresses in cold rolled polycrystalline Cu, Ni, and Al, as well as in cold torsioned Fe, were determined by X-ray diffraction profile analysis using synchrotron radiation. At different deformation degrees, scanning measurements across single grains with a foc…
${\mathrm{TlGaTe}}_{2}$ has a quasi-one-dimensional crystal structure consisting of Tl and linked ${\mathrm{GaTe}}_{4}$ tetrahedral chains. We have studied the electronic band structure of ${\mathrm{TlGaTe}}_{2}$ by means of photoemission spectroscopy and band-structure calculation. Comparison between both results is…
Diazo resin (DR) and poly(maleic anhydride- co -styrene) (PMS) can form a charge-transfer complex in methanol. A multilayer film was fabricated successfully from DR and PMS based on the charge-transfer interaction. After UV irradiation, the stability of the film toward polar solvents increases significantly due to the…
Atomistic simulations show that there are long-ranged ferroelectric interactions between the ferroelectric layers in ferroelectric/paraelectric superlattices mediated by continuous chains of polarization running through the intervening paraelectric layers. The resulting behavior of the superlattice is strongly depende…
Interlayer modification of a layered polysilicate kanemite was performed by silylation with mono-, di-, and trichloro(alkyl)silanes. The introduction of silyl groups into the interlayer region was confirmed by XRD, IR, 13 C NMR, and 29 Si NMR. The layered structures of the silylated products were confirmed by swelling…
Ac and dc magnetization and heat-capacity (C) measurements performed on the pseudo-one-dimensional compound Sr$_3$CuIrO$_6$ reveal a competition between antiferromagnetic (AF) and ferromagnetic (F) exchange couplings, as evidenced by frequency dependence of ac susceptibility and by the absence of a C anomaly at the ma…
We present density-functional theory calculations of Ru 3d and O 1s surface core-level shifts (SCLSs) at an oxygen-rich Ru(0001) surface, namely for the O(1x1)/Ru(0001) chemisorption phase and for two surface terminations of fully oxidized RuO_2(110). Including final-state effects, the computed SCLSs can be employed f…
We investigated a method for obtaining a sintered bulk sample of single-phase Sr2MoO4, which has recently increased in importance due to its similarities to superconducting Sr2RuO4. We discovered that with the aid of Ti2O3 as a p(O2) buffer, high-purity Sr2MoO4 is successfully synthesized in a sealed tube. We confirme…
Numerical solutions of the Landau-Lifshitz-Gilbert micromagnetic model incorporating thermal fluctuations and dipole-dipole interactions (calculated by the Fast Multipole Method) are presented for systems composed of nanoscale iron pillars of dimension 9 nm x 9 nm x 150 nm. Hysteresis loops generated under sinusoidall…
We calculate magnetic anisotropy energy of Fe and Ni by taking into account the effects of strong electronic correlations, spin-orbit coupling, and non-collinearity of intra--atomic magnetization. The LDA+U method is used and its equivalence to dynamical mean--field theory in the static limit is emphasized. Both exper…
We used scattering dichroism to study the combined effects of viscous and magnetic forces on the dynamics of dipolar chains induced in magnetorheological suspensions under rotating magnetic fields. We found that the chains adjust their size to rotate synchronously with the field but with a constant phase lag. Two diff…
We consider the adsorption at an oil−water interface of spherical particles of two types. The first type has a homogeneous surface of uniform wettability. The second type, so-called “Janus” particles, has two surface regions of differing wettabilities. Homogeneous particles are strongly surface active but are not amph…
We introduce a phenomenological continuum model for the mode III dynamic fracture that is based on the phase-field methodology used extensively to model interfacial pattern formation. We couple a scalar field, which distinguishes between "broken" and "unbroken" states of the system, to the displacement field in a way…
Hydrogen-bond formation with the terminal oxygen atom is considered to be the basis of dioxygen molecule activation by cytochrome P450. In order to verify the effect of this hydrogen bond, we have undertaken the synthesis of a model complex: a binaphthyl-bridged porphyrin bearing hydroxy groups at suitable positions (…
Interfacial effects of nucleation inhibition and promotion were identified from the nucleation of paracetamol. Unlike the classic interfacial effects, which are caused by the change in nucleation barrier, the nonepitaxial interfacial effects are only associated with kink integration kinetics. Methylparaben inhibits nu…
Hochaktiv, zeitlich stabil und wasserresistent ist der hier vorgestellte Katalysator Mn/TiO2 für die selektive Reduktion von NO durch NH3 [Gl. (1)]. Mit ihm beträgt wie mit den analogen Cu- und Cr-haltigen Katalysatoren die Ausbeute an N2 bei Temperaturen ≤120°C bereits 100 %. Die Lewis-Acidität, die Redoxeigenschafte…
Ab durch die Mitte: Cyclische D,L-α-Peptide ordnen sich in Lipiddoppelschichten zu membrandurchspannenden Ionenkanälen an, die einen effizienten Transport von Glutaminsäure ermöglichen (siehe Bild). Der Molekültransport ist größen- und formselektiv, wie die hohen Transportgeschwindigkeiten zeigen, die nur mit den küns…
A liquid-crystal (LC) photoalignment method, based on the use of low-molecular-weight photo-cross-linkable (LMWPC) composites is proposed. The basic idea of this method is that cross linking or both cross linking and polymerization of LMWPC composites are realized immediately on the substrate simultaneously with the p…
We present an electrical transport study of the two-dimensional (2D) organic conductor $\ensuremath{\tau}\ensuremath{-}[\mathrm{P}\ensuremath{-}(S,S)\ensuremath{-}\mathrm{DMEDT}\ensuremath{-}\mathrm{TTF}{]}_{2}({\mathrm{AuBr}}_{2})$ $({\mathrm{AuBr}}_{2}{)}_{y}$ (where $y\ensuremath{\sim}0.75)$ at low temperatures and…
Glacial phase clustering and growth in triphenyl phosphite is observed in the temperature interval of 210 K to 214 K by small angle neutron scattering performed at the NIST Center for Neutron Research. Presented are the radius, volume fraction, and polydispersity of clusters of glacial phase surrounded by a supercoole…