Materials Literature
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The synthesis of a verdazyl radical with a carboxylate substituent renders the radical highly soluble in water, thereby permitting the aqueous synthesis of Ni(II) and Co(II) verdazyl complexes which have been structurally and magnetically characterized.
Abstract The influence of the dominance of different processes on the microstructural development of a quartzite was investigated using the numerical model ‘ELLE’. Dynamic recrystallization of a polycrystalline aggregate was simulated by the concurrent operation of viscous deformation, lattice rotation, subgrain forma…
Block copolymers create various types of nano-structures, e. g., spheres, rods, cubes, and lamellae. This review discloses the dynamic macromolecular organization of block copolymers comprising poly(L-lactide) (PLLA) and poly(oxyethylene) (PEG) that allows to simulate elaborate biological systems. The block copolymers…
Incorporation of alkaline-earth cations into the zircon-type lattice of Ce1 − xAxVO4 (A = Ca, Sr; x = 0–0.2) leads to higher p-type electronic conductivity, while the tetragonal unit cell volume and Seebeck coefficient decrease due to increasing concentration of electron holes localised on cerium cations. The oxygen i…
The study investigating the electrical properties of dense lead-free piezoelectric ceramics in the (1 − x)Sr2NaNb5O15–xCa2NaNb5O15 (SCNN) system with x ranging from 0.05 to 0.35 is reported here. X-Ray diffraction patterns all showed a single tetragonal tungsten bronze phase, peak broadening being seen on increasing t…
The main operational parameters controlling borehole stability in drilling shales with environmentally acceptable water-based drilling fluids are the density and the chemical composition of the fluid. An electro-chemo-poro-elastic model for saturated shale is presented, which describes the interaction between the dril…
OBJECTIVE: The purpose of our study was to assess the safety and dialysability of gadobutrol, a new, electrically neutral, and highly concentrated MR contrast agent, in patients who require hemodialysis. SUBJECTS AND METHODS: Eleven patients with end-stage renal failure who required ongoing hemodialysis were enrolled…
The dimercaptan 2,5-dimercapto-1,3,4-thiadiazole (DMcT) has been employed as a component in secondary lithium battery cathodes. However, spectroscopic studies of its behavior have been impeded by general uncertainty regarding its vibrational band character. The purpose of this study is to provide a spectroscopic basis…
The structural changes and magnetic anomalies accompanying martensitic transformations in Ni–Mn–Ga alloys are briefly discussed. The role of lattice tetragonality of martensite in the reduction of magnetic field needed for the observation of large magnetostrain effect is theoretically analyzed, considering the compens…
Abstract A hyperbranched polycarbosilane of the type [R 3 SiCH 2 −] x [−SiR 2 CH 2 −] y [−SiR(CH 2 −) 1.5 ] z [−Si(CH 2 −) 2 ] l (R = H, –CH 2 CH=CH 2 , or OR) has been prepared, which was used as a source of inorganic/organic hybrid materials and, through pyrolysis, as a precursor to inorganic solids with unusual mic…
We present a method that alleviates some of the sensitivity to the inclusion of diffuse basis functions when calculating partial atomic charges from a Löwdin population analysis. This new method locally redistributes that part of the Löwdin population that comes from diffuse basis functions so that the final charges c…
The properties of porous GaP, formed by anodic etching in are described. Pore size, pore density, and the interpore distance depend on the dopant density and the potential at which the sample is etched. In addition, it is shown that at high potential, the GaP passivates as a result of the formation of an oxide layer.…
The mean first passage time of cyclization τ of a semiflexible polymer with reactive ends is calculated using the diffusion-reaction formalism of Wilemski and Fixman [J. Chem. Phys. 60, 866 (1974)]. The approach is based on a Smoluchowski-type equation for the time evolution, in the presence of a sink, of a many-body…
Compressive tests were conducted in vacuum at temperatures up to 1203 K, on the Ti3SiC2 samples synthesized from 2Ti/2Si/3TiC powder mixture through pulse discharge sintering technique. The compressive strength of Ti3SiC2 compound showed a monotonic decrease with increasing testing temperature. The Ti3SiC2 samples dis…
The crystal structure of [(CH3)4N]4Na2H[alpha-PW11O39].8H2O has been determined by using the Weissenberg camera at the BL04B2 beamline of SPring-8, revealing that it contains a disorder-free lacunary [alpha-PW11O39]7- anion with one sodium cation embedded into its lacuna that links the oxometalate building blocks into…
Porous titanium-nickel shape memory alloys (TiNi SMA) can be fabricated using special engineering technique. This material is a whole porous material with interconnected pores. This porous TiNi SMA retains the unique properties of solid TiNi SMA. Its porosity and pore size can be controlled. Its application to orthopa…
A new inorganic–organic solid, with a 2∶1 phyllosilicate layer structure and octyl chains directly bound to the inorganic sheets via Si–C covalent bonds, was prepared at room temperature from an ethanolic gel with the molar composition RSiO3/2 ∶ 0.255 Al2O3 ∶ 0.5 MgO ∶ 130 CH3CH2OH ∶ 0.62 Na2O. Octyltriethoxysilane wa…
We explore the role of electronic and ionic polarization energies in the physics of “colossal” magnetoresistive (CMR) materials. We use the Mott-Littleton approach to evaluate polarization energies in the LaMnO 3 lattice associated with holes localized on both the Mn 3+ cation and the O 2− anion. The full (electronic…
The mobilities of various electrolyte-derived species in amorphous anodic titania have been determined, with stabilization of the oxide structure by incorporation of silicon species from a sputter-deposited Ti-6 atom % Si alloy. From comparison of the distributions of silicon marker species and electrolyte-derived spe…
MHPB(H)PBC and MHPB(F)PBC were studied by means of refractometric measurements. The refractive indices: n “ (T), n Á (T) and n I (T) were measured using combined methods, applying both appropriately prepared Abbe refractometer and interference wedge. Values of the n “ (T), n Á (T) for the Sm A*, Sm C* and Sm C A * pha…