Phase formation in the System Ga2S3–Eu2O3

The diagram of state of Ga₂S₃? Eu₂ O₃ system has been investigated by the methods of differential thermal, high-temperature differential thermal, X-ray phase shift, microstructural and thermodynamic analyses, measurement of microhardness and density of the samples. It has been established that the system is eutectic, the solubility at 295 K on the part of Gas₂S₃ reaches 7 mole-% of Eu₂O₃ and Ga₂S₃ · Eu₂ O₃ was found.     

µ−spin rotation study of the temperature-dependent relaxation rate of acceptor centers in silicon

Temperature-dependent remanent polarization of negative muons in a silicon crystal doped with phosphorus (3.2 × 10¹², 2.3 × 10¹⁵, and 4.5 × 10¹⁸ cm^?3) and aluminum (2 × 10¹⁴ and 2.4 × 10¹⁸ cm^?3) was examined. Measurements were made over the temperature range 4–300 K in a magnetic field of 2000 G perpendicular to the muon spin. Temperature dependence of the relaxation rate was determined for the magnetic moment of a shallow Al acceptor center in a nondeformed silicon sample, and the hyperfine interaction constant was estimated for the interaction between the magnetic moments of muon and electron shell of the muonic mAl atom in silicon.     

Effect of Laser Radiation on InSe and GaSe Thin Films Grown via Laser Sublimation and Chemical Deposition

Russian Journal of Physical Chemistry A - The formation of indium and gallium monoselenide thin films under the action of a powerful Nd : YAG laser is described. The use of laser...     

Ethyl 2-(quinoxalin-2(1H)-on-3-yl)acetate and its mono- and dibromo derivatives in the synthesis of 2,2′-biquinoxalin-3,3′(4H,4’H)-diones

Russian Chemical Bulletin - The synthetic scope of ethyl 2-(quinoxalin-2(1H)-on-3-yl)acetates and their mono- and dibromo derivatives in the synthesis of...     

Optical properties of metamaterial-based devices modulated by a liquid crystal

Due to the fact that it is possible to manipulate light with photonic crystals (PCs), PCs hold a great potential for designing new optical devices. There has been an increase in research on tuning the optical properties of PCs to design devices. We presented a numerical study of optical properties of metamaterial-based devices by liquid crystal infiltration. The plane wave expansion method and finite-difference time-domain method for both TE and TM modes revealed optical properties in photonic crystal structures in an air background for a square lattice. E7 type has been used as a nematic liquid crystal and SrTiO₃ as a ferroelectric material. We showed the possibility of the metamaterials for a two-dimensional photonic crystal cavity on a ferroelectric base infiltrated with a nematic liquid crystal.     

Structure-related variable responses of calcium sensitive MRI probes

A new series of Gd(3+) complexes based on DO3A (GdL(1)-GdL(4)) was synthesized and investigated. They possess side chains with different structures which determine their varying binding properties and response towards endogenous metal ions, measured by changes in the longitudinal relaxivity (r(1)). GdL(4) exhibits the highest selectivity toward Ca(2+) in comparison to the other complexes, with up to a 63% increase of the r(1). GdL(2) and GdL(3) also respond to different Ca(2+) concentration ranges, however with a lower selectivity since the r(1) changes are also observed in the presence of other cations such as Mg(2+), Zn(2+) or Cu(2+). Assessment of the hydration number (q) via luminescence lifetime measurements confirmed that the change in q is responsible for the r(1) response for all the complexes.