Materials Literature
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We compare the kinetics of the formation of an ordered structure in the Cu-49 at % Pd alloy in various initial states and demonstrate that the alloy can be brought into a single-phase, B 2-ordered state, at variance with the commonly accepted Cu-Pd phase diagram. The alloy in this structural state has an extremely low…
Superconductivity (SC) and long-range ferromagnetism (FM) are mutually antagonistic, thus in general SC does not coexist with FM. In this mini-review, however, we will show that such a coexistence can inhabit several iron pnictide systems, including EuFe 2 (As 1− x P x ) 2 , Eu(Fe 1− x Co x ) 2 As 2 , Eu(Fe 1− x Ru x…
Various methods were employed to prepare precipitated calcium carbonate (PCC) particles. Particle size and morphology were dependent on reaction conditions as well as temperature, reagents and stirring, either mechanical or by ultrasound probe sonication. Sonication helped to reduce the size of CaCO3 particles as well…
A method has been proposed for the preparation of nickel ferrite nanoparticles in a system of direct sodium dodecyl sulfate micelles using ion flotation. Amorphous nickel ferrite nanoparticles with the overall composition x NiFe 2 O 4 · y Fe 2 O 3 · z H 2 O, containing dodecyl sulfate anion impurities, have been prepa…
Ca 0.5 Zr 2 (PO 4 ) 3 :Er/Yb and Ca 0.75 Zr 2 (PO 4 ) 2.5 (SiO 4 ) 0.5 :Er/Yb compounds have been prepared and their luminescence properties and biocompatibility have been investigated. We found synthesis conditions that ensured phase homogeneity and formation of nanopowders. Their luminescence properties have been st…
A novel method for temperature dependence of order parameter calculations at different wavelengths through birefringence measurements for ferroelectric liquid crystals (S)-(-)-2-methylbutyl 4′-(4″-n-alkanoyloxy benzoyloxy) biphenyl-4-carboxylates (where n = 16 and 18) has been proposed using image analysis and linear…
Interlayer Rb(+) of the perovskite-type layered oxyfluoride RbSrNb(2)O(6)F was ion-exchanged with H(+), and the protonated phase was reacted with aqueous solution of tetrabutylammonium hydroxide to exfoliate it into nanosheets. The resulting nanosheet suspension exhibits Tyndall scattering of a laser beam, indicating…
The effect of hydrogen bonding on the phase behavior of PS-based block copolymer and poly(styrene-graft-acrylic acid) (PS-g-PAA) blends was investigated. The presence of hydrogen bonding enhanced the compatibility of two copolymers. This caused PS-g-PAA to intervene in the interface between microdomains of the block c…
The morphological evolution of PANI helixes was achieved without the use of chiral dopants, but by a facile process through the generation of onion-like multi-lamellar vesicles used as a novel soft-template and a liquid crystal acting as a promoter for PANI polymerization and self-assembly, which is a breakthrough for…
We extend the quiescent and stressed versions of naïve mode coupling theory to treat the dynamical arrest, shear modulus, and absolute yielding of particle mixtures where one or more species is a nonrotating nonspherical object. The theory is applied in detail to dense isotropic "chemically matched" mixtures of variab…
We investigate theoretically spin injection efficiency from the ferromagnetic graphene to normal graphene (FG/NG) based on electron optics, where the magnetization in the FG is assumed from the magnetic proximity effect. Based on a graphene lattice model, we demonstrated that one spin-species electron flow from a poin…
The aim of the work was to investigate the adsorption of negatively charged cyanine dye 5,5′-disulfopropyl-3,3′-dichlorothiacyanine (TC) on the surface of borate capped gold nanoparticles (AuNPs) with average core sizes of 6 and 10 nm. The characterization of AuNPs in the presence and absence of TC was performed by me…
Using a phase-sensitive degenerate four-wave mixing technique in heterodyne detection we measured the ultrafast changes of the complex polarizability in single gold nanoparticles at the surface plasmon resonance. Two components in the nanoparticle nonlinear response are distinguished, depending on the linear polarizat…
Titanium(III) hydrazide gels designed for Kubas-type hydrogen storage were synthesized from the reaction between tris(bis(trimethylsilyl)methyl) titanium and anhydrous hydrazine. The materials demonstrate a fully reversible H2 adsorption capacity of 2.63 wt% and 36.7 kg m−3 at 298 K and 143 bar without saturation. Int…
Abstract The oxidation kinetics of four Fe-Cr-Mn-Ni based steels, utilized in automobile industry, have been studied as a function of temperature (973–1273 K) and oxygen partial pressure (5–10 5 Pa). It has been shown that the rate of corrosion of these steels under isothermal conditions is determined by diffusion of…
The thermophysical properties of undercooled liquid alloys at high temperature are usually difficult to measure by experiment. Here, we report the specific heat of liquid Ti45Al45Nb10 ternary alloy in the undercooled state. By using electromagnetic levitation technique, a maximum undercooling of 287 K (0.15 T L) is ac…
Abstract In this study, the effect of erbium oxide (Er 2 O 3 ) addition on the microstructure, sinterability and mechanical properties of cubic zirconia (c-ZrO 2 ) was investigated. 0–15 wt% Er 2 O 3 and c-ZrO 2 powders were mixed by means of colloidal processing and the specimens were sintered at different temperatur…
We have studied the reduction of silicon tetrachloride in the presence of a nickel-chloride-based catalyst. The kinetics of the process have been analyzed and the order and activation energy of the reaction have been determined. One of the main reactions on the catalyst surface is the transfer of a chlorine atom from…
We compare the absorption and fluorescence spectra of single crystals and suspensions of nanoparticles with the prediction of the Frenkel theory. The single crystals of a novel synthesized fluorescent BODIPY derivative dye, adamantyl mesityl BODIPY (4,4-difluoro-3,5-di-(adamantyl)-8-mesityl-4-bora-3a,4a-diaza-s-indace…
We performed surface hopping simulations of Al + H(2)O collisions by a direct semiempirical method, reproducing the conditions of previous beam-gas experiments. We observed the formation of the HAlOH species, that dissociates to AlOH + H after a lifetime of about 0.6 ps. This species undergoes nonadiabatic transitions…