Materials Literature
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Pure samples of H2O (D2O) ice IV and of H2O (D2O) ice XII were prepared by isobaric heating of high-density amorphous ice at a rate of ≈0.5 K min−1 up to ≈175 K and a pressure of 0.81 GPa for ice IV, and at a heating rate of ≈12 K min−1 and a pressure of 1.21 GPa for ice XII. The crystalline phases recovered at 77 K a…
The surface energies and electronic structure of (111), (110), and (100) surfaces of CeO2 have been studied using the first-principles projector augmented-wave method within the local density approximation (LDA) and generalized gradient approximation (GGA) and are compared with molecular dynamics (MD) simulations at 1…
The effect of an applied tensile stress on the pore ordering during anodization of aluminum was studied. A regular arrangement of nanopores was observed at a relatively low external tensile stress. On the contrary, a high tensile stress completely destroys the pore arrangement on anodized surfaces. Under such conditio…
New push-pull NLO-phores based on lanthanide complexes (Ln = La, Gd, Dy, Yb) featuring an annelated dibutylaminophenyl functionalised terpyridyl ligand have been synthesised and shown to exhibit large first-order hyperpolarizability.
Exfoliated graphite (EG) is proposed as an electrode material for solid-state electrochemical capacitors. The EG-based capacitors assembled with a solid electrolyte of polyethylene oxide-ethylene carbonate-propylene carbonate- show high specific capacitance in the range of The capacitors also show excellent cyclabilit…
We have developed a shell model potential to describe PbTiO3 and PbMg1/3Nb2/3O3 (PMN) by fitting to first-principles results. At zero pressure, the model reproduces the temperature behavior of PbTiO3, but with a smaller transition temperature than experimentally observed. We then fit a shell model potential for the co…
Highly active Au-containing hopcalite catalysts for ambient temperature CO oxidation have been prepared by a co-precipitation procedure. The addition of Au to the CuO–MnO system resulted in a marked improvement in the catalytic performance, by increasing the rate of CO oxidation and decreasing the extent of catalyst d…
The magnetoelectric effect in multilayer ferrite-piezoelectric composites has been theoretically and experimentally studied. Using the method of effective parameters, an expression for the magnetoelectric coefficient is determined and its frequency dependence is analyzed. It is shown that, in the region of electromech…
Three kinds of titanium-molybdenum alloy, Ti-8Mo, Ti-14Mo and Ti-20Mo (mass%), quenched from 1223 K were investigated to clarify the tensile behavior and the cold workability using tensile test and conical cup test. In the quenched state Ti-14Mo showed the superior workability. Ti-20Mo has poor ductility in tensile te…
A new form of carbon nanofiber web was prepared that is considered to be a suitable material for the electrode of a supercapacitor exhibiting high capacitance. A polybenzimidazol/dimethyl acetamide solution was electrospun, and subsequently the web was steam activated at 700-900°C. The specific capacitance of the acti…
Water-soluble and neutral Ln(III) and Zn (II) complexes of pyridine- and (pyridine-1-oxide)tetrazole have been synthesized and the Gd derivatives have great potential as high-relaxivity low-osmolarity MRI contrast agents.
Comfort characteristics of plain-woven fabrics, containing viscose staple fiber twist-less and hollow fibrous assemblies and core-sheath type DREF-III yarn in weft, have been reported in the present paper. The twist-less and hollow fibrous assemblies are the individually separated parallel core and annular sheath comp…
We have investigated magnetic field-induced strain (MFIS) associated with rearrangement of martensite variants and its corresponding magnetization process in a disordered Fe-31.2Pd(at%) single crystal and an ordered Fe3Pt single crystal, exhibiting a cubic to tetragonal martensitic transformation at 230 K and 85 K, re…
Heating single-walled carbon nanotubes (SWNTs) with molten hydroxides MOH (M = K, Cs) gave MOH@SWNT in good yield; high resolution transmission electron microscopy (HRTEM) indicated that CsOH in CsOH@SWNT often adopts twisted 1D crystal structures inside SWNTs; treating MOH@SWNT with water at room temperature removes…
The influence of cathode composition on the open-circuit voltage (OCV) and the performance of a single chamber solid oxide fuel cell (SC-SOFC) was investigated. Because the SC-SOFC is operated using a mixture of air and fuel, the OCV of the cell is determined by the difference of catalytic activity between the cathode…
Endosmart GmbH was founded in January 2002 and is a spin-off from the Forschungszentrum Karlsruhe. Endosmart focuses on the use of NiTi mostly outside the implant market. Therefore a lot of tools especially for instruments for minimally invasive surgery are being developed. Innovative hingeless graspers, baskets, flex…
Successful synthesis of a series of highly conjugated porphyrin analogues, including thia-, dithia- and oxathia-tetrabenzoporphyrins, and their optical properties are reported.
We have refined a one-pot synthesis of trans-A2B-corroles via the condensation of 5-(pentafluorophenyl)dipyrromethane with aldehydes followed by macrocyclization mediated by DDQ. After thorough examination of reaction parameters and thanks to the identification of key factors influencing the formation of bilanes and t…
[Fe(tpy-DTTA)(2)Gd(2)] is a self-assembled trinuclear complex based on a novel ligand in which a terpyridine and a poly(amino carboxylate) moiety are connected; it has a well-defined topology with favourable features to attain high relaxivities, i.e. a rigid Fe(II)(tpy)(2) core, reduced flexibility at the periphery th…
Surface dissolution and diffusion of oxygen molecules (O2) in SiO2 glass were studied by their photoluminescence at 1272 nm excited with a titanium sapphire laser oscillating at 765 nm. The dissolution of O2 from ambient atmosphere at both surfaces was much faster than the following diffusion of O2 into SiO2 glass, in…