Substrate temperature modulated optical characterizations of α-CdInSe thin films grown by pulsed laser deposition technique.

The current study examines the effect of substrate temperature ( ) on the optical characteristics of CdInSe thin films grown by the pulsed laser deposition technique using a UV-Vis-NIR spectrophotometer. Transmittance maxima of CdInSe thin films shift with a change in , exhibit high absorption in the visible region, and depict an absorption coefficient () of ≃10 m. Refractive index spectra of CdInSe thin films controlled by reflect crests at characteristic wavelengths ( ) and a wavelength () higher than ; spectra display normal dispersion.

Computational and experimental approach for investigating the microstructural parameters of a cadmium indium selenide (α-CdInSe) ternary semiconducting compound.

Several properties are carefully considered before choosing a semiconducting material for the fabrication of a thin-film electronic device. Cadmium indium selenide (CdInSe) is a ternary semiconducting compound belonging to the II-III-VI family, where II = zinc (Zn), cadmium (Cd), or mercury (Hg); III = aluminium (Al), gallium (Ga), or indium (In); and VI = sulphur (S), selenium (Se), or tellurium (Te). The Cambridge serial total energy package (CASTEP) module, within the framework of density functional theory (DFT) using the PBE-GGA (Perdew-Burke-Ernzerhof generalized gradient approximation), was used to compute the elastic constants for the CdInSe ternary semiconducting compound.

The Nature of Ferromagnetism in a System of Self-Ordered α-FeSi Nanorods on a Si(111)-4° Vicinal Surface: Experiment and Theory.

In this study, the appearance of magnetic moments and ferromagnetism in nanostructures of non-magnetic materials based on silicon and transition metals (such as iron) was considered experimentally and theoretically. An analysis of the related literature shows that for a monolayer iron coating on a vicinal silicon surface with (111) orientation after solid-phase annealing at 450-550 °C, self-ordered two-dimensional islands of α-FeSi displaying superparamagnetic properties are formed. We studied the transition to ferromagnetic properties in a system of α-FeSi nanorods (NRs) in the temperature range of 2-300 K with an increase in the iron coverage to 5.

Inhibitory Effects of Carrageenans on Endotoxin-Induced Inflammation.

The inhibitory effects of carrageenans (CRGs) on lipopolysaccharide (LPS) induced inflammation in a mouse model of endotoxemia and in complex therapy of patients with enteric infections of Salmonella etiology were studied. The atomic force microscopy (AFM) examination of LPS and its mixture with CRGs showed that the LPS morphology is significantly changed under the action of κ- and κ/β-CRGs. CRGs were able to increase the synthesis of anti-inflammatory interleukin 10 (IL-10) in vitro, and, at low concentrations, their activity in the mixture with LPS was higher.

Formation of a Thin Continuous GaSb Film on Si(001) by Solid Phase Epitaxy.

Nanocrystalline GaSb films were grown on Si(001) from the stoichiometric Ga⁻Sb mixture using solid-phase epitaxy at temperatures of 200⁻500 °C. Use of the solid-phase epitaxy method allowed the suppression of Ga surface diffusion and prevention of intense Sb desorption. At the annealing temperature of 300 °C, a 14-nm-thick GaSb film aggregates, while a 20-nm-thick GaSb film remains continuous with a roughness of 1.