High quality bismuth germanium oxide single crystals were irradiated by a femtosecond pulsed laser beam of increasing power. Analyses performed on irradiated and unirradiated samples showed significant changes in transmittance, transmission spectra, sample color, Raman spectra, X-ray diffraction...

Bismuth germanium oxide Bi12GeO20 (BGO) has very interesting electrical, optical and magnetic properties. In order to make devices based on this material more flexible, its powder was used for preparing polymer composites. This study reports investigation of the effects of using different solven...

The effect of vanadium doping on the structural, dielectric and ferroelectric properties of Bi4Ti3O12 (BTO) has been studied. Bi4–x/3Ti3–xVxO12 (x = 0, 0.006, 0.012, 0.018, 0.024 and 0.03 mol%) were prepared using a sol–gel synthesis method and calcined at 400 °C for 3 h. All samples were si...

Ab initio investigation of the possibility of oxygen ion migration in non-stoichiometric bismuth titanate pyrochlore Bi1.5Ti2O6.25 has been performed. Density functional theory calculations together with the nudged elastic band method were used to estimate the O2– migration barriers. The migrat...

An enhanced visible light photocatalytic performance of band-gap engineered bismuth titanate photocatalyst by tin and carbon (Sn&C) codoping is being reported in the present work. The photocatalyst sample was synthesized by the Pechini route and characterized by powder XRD, micro-Raman, XPS and ...

A novel chemiluminscence (CL) flow-through sensor for pipemidic acid is described. It was based on the sensitizing effect of pipemidic acid on the CL oxidation of sulfite by sodium bismuthate in H2SO4 media. The solid-phase sodium bismuthate was mechanicially immobilized on the sponge rubber ins...

The performance of a Cadmiun Telluride (CdTe) detector for low energy photon spectrometry was evaluated. Collected data were analyzed using the basic software package available with the CdTe detector system and the COLEGRAM code developed for photopeak deconvolution at LNHB/France. Several calib...

The present paper reports a detailed and systematic theoretical study of structural, mechanical, electronic, vibrational and thermodynamical properties of three beryllium chalcogenides BeS, BeSe and BeTe in zinc blende, NiAs and rock salt phases by performing ab initio calculations based on dens...

The polarized infrared absorption due to the fundamental and 2nd-harmonic excitation of the localized vibration of Be in CdS and CdSe is observed. The splitting and the polarization property are in accord with C3ν point symmetry of Be impurity. The anharmonic potential coefficients are obtained...

Infrared localized mode sidebands due to the combined excitation of the localized mode and the host lattice modes are observed for ZnSe:Be. Two bands are obtained in the acoustic band mode region. The band at 105 cm-1 is assigned to a resonant mode and the band at 72 cm-1 is attributed to the im...

We focus on several aspects of our recent optimization of Beryllium-containing ZnSe-based laser diodes. By passivating the GaAs surface with a BeTe buffer, defect densities below 104 cm−2 can be achieved. Structures with BeZnSe–ZnSe-strained layer superlattices in the waveguide regions show T0 ...

Beryllium-containing ZnSe-based compound semiconductors introduce substantial additional degrees of freedom for the design of wide gap II–VI heterostructures. An overview of the advantages of beryllium chalcogenides is given here. A variety of BeTe-ZnSe and BeMgZnSe-ZnSe structures has been fab...

Temperature dependent physical effects of ultrasonic wave viz. ultrasonic attenuation due to interaction of sound wave and thermal phonons, thermoelastic loss and dislocation damping have been studied in beryllium chalcogenides (BeX, X = S, Se and Te) in the temperature range 50–500 K, along th...

First-principles calculations are performed to study the structural, electronic and thermodynamic properties of technologically important Cd1−xBexSe ternary alloys using the full potential-linearized augmented plane wave method within the density functional theory. We use both PBE and Engel–Vos...

The non-linear current (I)–voltage (V) characteristics of titanium dioxide doped with small quantities of tantalum and barium (99.9 TiO2 + 0.1 Ta and 99.4 TiO2 + 0.1 Ta + 0.5 Ba, all are in at.%) were investigated. These samples have the non-linear coefficient (α) values of (20–30) with high ...

The goal of this study was to determine the influence of pH and oxygen conditions on the reaction kinetics of hexavalent chromium (Cr(VI)) with calcium polysulfide (CPS). The observed kinetic reaction rate, kobs, between Cr(VI) and CPS was evaluated for the pH range 5.5–8.5, aerobic open, aerob...

Although LiNO3 could effectively solve the polysulfide (PS) shuttle problem in Li-S battery, however, it causes explosive hazards with the cathode composition like gun powder (KNO3, Sulfur, and Carbon). Herein, a LiNO3-free electrolyte was designed to simultaneously inhibit the PS shuttle and li...

Pyroelectric properties of 1–3 ceramic/polyvinylidene fluoride (PVDF) composites by using barium titanate nanowires (BTnws) and dopamine modified BTnws (DM-BTnws) as inclusions were firstly reported. 0–3 composites based on dopamine modified BT nanoparticles (DM-BTnps)/PVDF were also prepared ...

A novel microporous barium-containing silicate AES-20 was successfully synthesized, and its crystal structure was determined based on the ab-initio structure analysis from powder X-ray diffraction data. AES-20 was composed of unique silicate layers having 8- and 5-rings and interlayer barium ato...

In this work, the LTCC composite materials containing fused silica and monoclinic zirconia ceramic particles, respectively, which based on the composite matrix composed of the barium borate glassy matrix and α-alumina ceramic particles, were prepared by traditional solid-state preparation proce...