Fabrication and luminescence properties in Yb –Tb co-doped a-SiCO thin films

Loreleyn F Flores; Karem Y Tucto; Jorge A Guerra; Rolf Grieseler; Jan A Töfflinger; Andres Osvet; Miroslaw Batentschuk; Roland Weingärtner

Volume 3, Issue 6 , 2018, Pages 372-376


  Amorphous silicon oxycarbide (a-SiCxOy) single doped with Yb3+ and co-doped with the couple Tb3+ - Yb3+ thin films were grown on crystalline silicon substrates by rf magnetron sputtering. The elemental composition in at. % is determined by energy dispersive spectroscopy and fourier transform infrared ...  Read More

­­­Local electronic structure investigation of the sol-gel processed calcium hydroxide material

Jitendra Pal Singh; So Hee Kim; Weon Cheol Lim; Sung Ok Won; Keun Hwa Chae

Volume 3, Issue 6 , 2018, Pages 377-381


  In the present work, we have reported the synthesis of calcium hydroxide from calcium nitrate. Synthesized nanoparticles were characterized using X-ray diffraction, scanning electron micrographs, and near edge X-ray absorption fine structure measurements. Synthesized nanoparticles exhibit tetragonal ...  Read More

Study on time-dependent surface properties of plasma treated polymer fibers

Jan Trejbal; Tereza Valentová; Zdeněk Prošek

Volume 3, Issue 6 , 2018, Pages 382-385


  This work focuses on a surface modification of polypropylene micro-fibers having 18 μm in diameter and 12 mm in length by means of the cold low-pressure oxygen plasma treatment. The main goal is to change fiber surface properties from hydrophobic to hydrophilic and from smooth to slightly ...  Read More

Green water flooding of fractured and heterogeneous oil reservoirs at high salinity and high temperature

Omar Chaalal; Essa Lwisa

Volume 3, Issue 6 , 2018, Pages 386-391


  Many oil formations contain water having high salinity and/or high concentrations of divalent ions such as calcium or magnesium dissolved therein, and are additionally at high temperatures.  Most of the available surfactants used in oil recovery operations are either ineffective in high salinity ...  Read More

Polymeric number average molecular weight in submicron films as a tool for the manipulation of water phenomena in translucent coatings

Natalia Lopez-Barbosa; Johann F. Osma

Volume 3, Issue 6 , 2018, Pages 392-395


  Absorption and desorption properties of poly(ethylene glycol) diacrylate (PEGDA) have seen to greatly vary depending on the molecular weight of the polymer, suggesting a dependence of the wetting phenomena on its molecular weight. Here, two sets of polymeric submicron films (140 and 190 nm) were fabricated ...  Read More

Customer acceptance evaluation of design for material value conservation using structural equation modelling: A case study of plastic packaging

Djoko Sihono Gabriel; T. Yuri M. Zagloel; Dadang Isnandar

Volume 3, Issue 6 , 2018, Pages 396-399


  Design for material value conservation in this case study was a trial implementation of design principles of plastic bag in order to minimize its value degradation and maximize its salvage value in the end of life, and therefore increase its acceptance by plastic recyclers. A Structural Equation Modelling ...  Read More

Sol-gel synthesis of mixed ferrites for biomedical applications

Joel Espino-Portillo; Dora A. Cortés-Hernández; José C. Escobedo-Bocardo; Héctor J. Sánchez; Mirna M. G. Saldívar-Ramírez; Laura E. De-León-Prado

Volume 3, Issue 6 , 2018, Pages 400-403


  The effect of mixed ferrites nature and that of several coatings on the magnetic properties and thus, on the heating ability of nanoparticles, was studied. The Mg0.4Ca0.6Fe2O4 and Mn0.5Ga0.5Fe2O4 ferrites, synthesized by sol-gel method, followed by heat treatment, were coated with oleic acid + Pluronic® ...  Read More

Mechanical, microstructural characterization and redesign of a BMX bicycle frame

Alejandro Zuleta; Andrés Valencia-Escobar; Carlos Rodríguez

Volume 3, Issue 6 , 2018, Pages 404-407


  The high requirements of Bicycle Motocross (BMX) race conditions demands on the bicycle frame complex dynamic and static loads states by which it is expected that frames to experience high levels of stress and strain. To build efficient bike frames in terms of performance, weight and quality, it is necessary ...  Read More

Correlation between structural aspects and mechanical properties of an Interstitial Free steel for automotive application

Mykhaylo Romanyuk; Martina Avalos; Edgardo R. Benavidez; Elena Brandaleze

Volume 3, Issue 6 , 2018, Pages 408-413


  The application of IF steels in the automotive industry has increased significantly due to their excellent deep drawability. The chemical composition, the microstructure, the precipitation phenomena and texture of the material determine the mechanical properties. This paper proposes, a more profound ...  Read More

High deformation effects on the plasticity of ultra-high carbon steel wires

Elena Brandaleze; Martina Avalos; Mykaylo Romanyuk

Volume 3, Issue 6 , 2018, Pages 414-418


  Steel wires under severe cold drawing deformation, develop high strength (5-6 GPa) and ductility. For these reasons it is relevant to increase the knowledge on the structural evolution and deformation mechanisms involved during wire drawing process, due to their critical applications such as bridges, ...  Read More

Enhancement of luminescence properties of Mn2+ substituted dysprosium doped Zinc sulfide nanophosphor

S. Rajesh; K. Thyagarajan; Vasudeva Reddy Minnam Reddy

Volume 3, Issue 6 , 2018, Pages 419-424


  Zinc Sulfide nanophosphor (ZnS) nanophosphor doped with 2 mol % Dysprosium (Dy) and co-doped with (2 – 6) mol % Manganese (Mn) was successfully prepared by cost-effective chemical co-precipitation method using polyvinylpyrrolidone (PVP) as the capping agent. The effects of dopant and co-dopant ...  Read More

Fabrication of biocompatible nanocomposite consisted of zinc oxide nanoparticles based poly (Acrylonitrile-co-Acrylic acid)

Nasrullah Shah; Touseef Rehan; Muhammad Balal Arain; Rabia Tabassum

Volume 3, Issue 6 , 2018, Pages 425-431


  The addition of appropriate additives can change the properties of the polymer matrix. Nanocomposites are useful because of its high aspect ratio. Selection of additives which can make a cheaper and multifunctional material is one of the major issues. ZnO nanoparticles can be used as an additive in preparing ...  Read More