Abstract: Yttrium aluminium borate crystals have excellent physical and chemical properties. In this paper, the electron paramagnetic resonance g factors gk, g⊥ of Yb3+ and hyperfine structure constants Ak, A⊥ of 171Yb3+ and 173Yb3+ isotopes in YAl3(BO3)4 crystal are c

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Abstract: In the present work we report on the analysis of the Urbach’s tail in pure and Mn-doped Cu2GeSe3 samples having small deviation from its ideal stoichiometry. It is found that the high values of the phonon energy hνp involved in the electrons/excitons-phonon i

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Abstract: In this work, high mobility thin-film transistors based on zinc nitride (Zn3N2) sputtered at room temperature using spin-on glass (SOG) as gate dielectric are presented. The inverted coplanar structure is used for the Zn3N2 thin-film transistors. The devices

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Abstract: The temperature dependence of the indirect and direct fundamental band gaps of the layered compound MnIn2Se4, that crystallizes in a rhombohedral defect structure with space group R¯3m(D 5 3d), was studied by optical absorption spectra. The data were analyzed

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Abstract: Molecular dynamics simulations were carried out to study adsorption of CO2 on a graphite surface at different gas concentrations. As the CO2 concentration increased, a decrement in the adsorption on the graphite surface was observed. When the graphite surface

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Abstract: In this contribution, the effect of In2O3 additions on the microstructure, physical and electrical properties of the SnO2-Co3O4-Ta2O5 ceramic system was investigated. Because the effect of In2O3 has been studied typically at low levels, special attention has

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Abstract: Borosilicate spheres - Zn22Al2Cu composites with a 2.9 g/cm3 density were prepared to assess whether changes in size affect the compression behaviour, and whether this effect depends on the alloy matrix microstructure. The composite material was manufactured

Resumen: El material compuesto de Zn22Al2Cu con esferas de borosilicato y densidad de 2.9 g/cm3 , fue elaborado para establecer si el cambio de sus dimensiones tiene efecto en su comportamiento ante la compresion, y si este efecto es distinto seg ´ un la microestructu

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Abstract: In this paper, a theoretical model is used to study the optical gain characteristics of GaN/Al0.2Ga0.8N quantum dot lasers. The model is based on the density matrix theory of semiconductor lasers with relaxation broadening. The effect of doping varying the si

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Resumen: En este trabajo se reporta la fabricación de un dispositivo láser de semiconductores III-V de confinamiento separado. La heteroestructura se creció usando la técnica de epitaxia por haces moleculares y se caracterizó óptica, topográfica y eléctricamente por m

Abstract: In this work the fabrication of III-V semiconductor laser device with separate confinement is reported. The heterostructure was grown by molecular beam epitaxy technique and it was characterized by optical, morphological and electrical techniques such as phot

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Abstract: Many studies, focused in TiO2 anodized, uses frequently a NH4F salt concentration from 0.3- 0.5 wt% and the whole information about how voltage, time and even pH affects to nanotubes morphology, are effective just for these concentration range. It is known th

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Abstract: To induce temperature changes on the sample surface by the incidence of a monochromatic modulated light beam and detect the changes produced in the thermal radiation emission, is the basic principle of the infrared photothermal radiometry technique. Until now

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Abstract: It is shown that the Riemann-Silberstein vector, defined as E + iB, appears naturally in the SL(2, C) algebraic representation of the electromagnetic field. Accordingly, a compact form of the Maxwell equations is obtained in terms of Dirac matrices, in combin

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Abstract: A non-abelian kink inducing asymptotically the breaking pattern SU(5)×Z2 → SU(4)×U(1)/Z4 is obtained. We consider a fourth order Higgs potential in a 1 + 1 theory where the scalar field is in the adjoint representation of SU(5). The perturbative stability of

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Abstract: By using the generalized exponential rational function method, we obtain new periodic and hyperbolic soliton solutions for the conformable Ginzburg-Landau equation with the Kerr law nonlinearity. The conformable derivative is considered to obtain the exact so

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Abstract: In this paper, we obtain analytical solutions for the time-fractional diffusion and time-fractional convection-diffusion equations. These equations are obtained from the standard equations by replacing the time derivative with a fractional derivative of order

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Abstract: In this work, we present a low-cost computer controlled, Arduino-based automation of the mass flow controllers for a chemical vapor deposition system. The major goal of the system is to provide the possibility to produce flow ramps of several gases for materi

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Resumen: En este trabajo se informa la preparación de nanopartículas de plata esféricas dispersadas en agua con distribución de tamaño bimodal (diámetro promedio de 1.8 y 44 nm), las cuales son depositadas sobre la superficie de hojas de Ficus benjamina por el método

Abstract: In this document, it is reported the preparation of spherical silver nanoparticles dispersed in water with bimodal size distribution (average diameter of 1.8 and 44 nm), which are deposited on the surface of Ficus benjamina leaves by the immersion method. The

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