Materials Literature
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A microscopic model of nonequilibrium light-induced phase transitions in spin crossover systems based on the solution of the equations for the density operator is developed. The conditions of light-induced and thermally induced bistability are revealed. The results are compared with those obtained in the framework of…
The pyrochlore-type matrices containing up to 10% wt. of U, Np, Pu and Am oxides were produced by self-propagating high-temperature synthesis (SHS) proposed as a method of preparation of the ceramic mineral-like matrices for immobilization of actinides. It was shown that basically the matrices consist of a phase of yt…
Chain dynamics in macromolecules that occur with slow characteristic exchange frequencies (1−100 Hz) influence the bulk mechanical properties of polymers. In this contribution, we systematically evaluate the change in conformational reorientations of individual polymer backbones once they form a miscible binary blend,…
Even six years after the first discovery of superconductivity in MgCNi3, the synthesis of this compound in the form of single crystals has not been very successful. Highly volatile Mg and less-reactive C are the main obstacles. Now, the synthesis and characterization of these single crystals are reported (see figure),…
The ability of quaternized polyamines (poly-N-alkyl-4-vinylpyridinium bromides possessing a number, m, of methylene groups in the N-alkyl substituent or a degree of alkylation, beta, and n,n-ionene bromides) to suppress the thermoaggregation of glyceraldehyde-3-phosphate dehydrogenase increased in the order m = 1 < 3…
A study of the borotungstate system has led to the characterization of new, original compounds based on the unconventional Keggin derivative [H(3)BW(13)O(46)](8-) ion (denoted as 1). [H(3)BW(14)O(48)](6-) (2) and the dimer [H(6)B(2)W(26)O(90)](12-) (3) crystallize as mixed cesium/ammonium salts and have been character…
Abstract Sodium alginate/chitosan (SA/CS) two ply composite membranes were prepared by casting and solvent evaporation technique. NaHCO 3 was used as a porogen additive to form pores in the interior of the composite membranes and glycerol was introduced as a plasticizer. The water uptake capacity, mechanical strength,…
The electron-phonon matrix element for edge states of carbon nanotubes and graphene at zigzag edges is calculated for obtaining renormalized energy dispersion of the edge states. Self-energy correction by electron-phonon interaction contributes to the energy dispersion of edge states whose energy bandwidth is similar…
Abstract The influence of annealing atmosphere on the optical properties of flower‐like ZnO is investigated. The flower‐like ZnO is composed of nanosheets. Annealing at 500°C results in the increase of the thickness of nanosheets and the enhancement of UV emission. PL spectra results show that the annealing atmosphere…
We present an important step in resolving a long-standing controversy regarding the lifetime of the internal ${\mathrm{Mn}}^{2+}$ $3{d}^{5}$ emission in $\mathrm{ZnS}$ nanoparticles. Transients of the luminescence have been measured over more than five orders of magnitude in intensity, and in the time slot from $50\ph…
We have studied, both theoretically and experimentally, the mechanism of photoluminescence (PL) of Ge nanocrystals in SiO 2 and GeO 2 matrices. Ge quantum dots (QDs) have been created by pulsed laser deposition (PLD). Time-resolved PL spectra in the photon energy range of 1.4– 3.2 eV have been measured within the time…
Single crystals of the MgZn2Ce alloy (magnesium dizinc cerium) were synthesized by a two-step method which couples the thermal treatment of pressed pellets of the pure elements with subsequent arc melting. The compound crystallizes in a Heusler-type (MnCu2Al) structure in the space group Fm\overline{3}m, with one Zn s…
Abstract The crystalline substance N,N ‐dimethyl anilinium picrate(DMAP) was synthesized and the single crystals of the title compound were grown by slow evaporation solution growth technique at room temperature. The crystalline nature of the material has been confirmed by powder X‐ray diffraction method. The elementa…
Department of Pathology, The University of Texas Southwestern Medical Center at Dallas, Dallas, Texas, USA Correspondence to Dr Michael F. Neerman, PhD, Department of Pathology, The University of Texas Southwestern Medical Center at Dallas, 5323 Harry Hines Boulevard, Dallas, TX 75390-9073, USA Tel: +1214 590 8443; fa…
A simple approach to prepare arrays of Au/TiO2 composite nanoparticles by using Au-loaded block copolymers as templates combined with a sol-gel process is described. The organic-inorganic hybrid films with closely packed inorganic nanodomains in organic matrix are produced by spin coating the mixtures of polystyrene-b…
Abstract A supramolecular compound, [Himi] 6 [As 2 Mo 18 O 62 ]·11H 2 O ( 1 ) (imi = imidazole), has been synthesized and characterized by single crystal X‐ray analysis, IR spectra, thermal gravimetric analysis, electrochemical and elemental analysis. The crystals are monoclinic, P 2(1)/n, a = 14.9529(8) Å, b = 20.952…
The corrosion of dental alloys has biological, functional, and aesthetic consequences. Various studies have shown that protein solutions can inhibit the corrosion of alloys. This study is planned to determine the relationship of organic constituents of saliva and the corrosion of dental alloys. The organic constituent…
A theoretical study of the first-row transition metal dicarbide cations MC2+ (M=Sc-Zn) has been carried out. Predictions for different molecular properties that could help in their eventual experimental detection have been made. Most MC2+ compounds prefer a C2v symmetric arrangement over the linear geometry. In partic…
The surface chemistry of benzene and bromobenzene over Pt(111) has been studied by temperature-programmed XPS/MS and NEXAFS. Time-resolved XPS shows that benzene adopts a single chemically distinguishable environment during low-temperature adsorption within the monolayer, with a saturation coverage at θ C 6 H 6 = 0.2…
A Monte Carlo ray tracing procedure is proposed to simulate thermal optical processes in heterogeneous materials. It operates within a detailed 3D image of the material, and it can therefore be used to investigate the relationship between the microstructure, the constituent optical properties, and the macroscopic radi…