Materials Literature
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Laboratory scale tests were developed to study the high consumption of water in a tannery in Toluca City, Mexico, needed to decrease the biological oxygen demand (BOD) in the wastewater. Biological oxygen demand is generally reduced by reducing the organic material with sodium hypochlorite. However, Cr(VI) is formed i…
We describe lithography-free fabrication of sub-micron surface features on quartz substrates by the reactive ion etching (RIE) in a CF4/Ar atmosphere. These submicron glass columns are well defined, have a high aspect ratio, with the underlying substrate being very flat. The geometry of the fabricated surface columns…
High nitrogen contents in solid solution as well as appropriate strengthening mechanisms in austenitic stainless steels can result in very high corrosion resistance. This is true in both air environment and in simulated human body fluids (corrosion fatigue). High cycle corrosion fatigue data are listed and compared wi…
Depolymerization of waste poly (ethylene terephthalate) and poly (butylene terephthalate) were undertaken in various alkaline solutions at different reaction parameters at 1 atm in a batch operation. Results were evaluated in terms of weight loss of both the waste polyesters as well as products obtained during depolym…
Blends of styrene butadiene rubber (SBR) with maleic anhydride grafted whole tire reclaim (MA-g-WTR) have been prepared and the cure and mechanical properties have been studied with respect to the reclaim content. The grafting was carried out in the presence of dicumylperoxide (DCP) in a Brabender Plasticorder at 150°…
Charge redistribution in organic/inorganic heterojunction between poly(3,4-ethylenedioxy thiophene)/poly(styrenesulfonate) polymer (PEDOT/PSS) is observed contact-less by infrared spectroscopic ellipsometry. Hole accumulation or depletion layer formation is detected according to the different work functions of n- and…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTTemperature Dependence of the Structure and Interaction of Starlike PEG-Based Block Copolymer MicellesCornelia Sommer and Jan Skov PedersenView Author Information Department of Chemistry and iNANO Interdisciplinary Nanoscience Cente…
The electrical assisted laser floating zone (EALFZ) solidification process makes the tailoring of fibre microstructures possible. The application of a dc electrical current of during the solidification process of Bi2Sr2Ca2Cu4O11 nominal composition fibres strongly modified phase development, crystal shapes and effecti…
Control of silicon carbide (SiC) polytype formation has been achieved. 3C, 2H, and 4H SiC heteroepitaxial films are fabricated on a sapphire (0001) substrate at a low temperature of 1100 °C using a pulsed-laser deposition (PLD) method. Images made by transmission electron microscopy clearly show that each film consist…
We have made ultrasonic measurements of ${\mathrm{Pr}}_{1\ensuremath{-}x}{\mathrm{Ca}}_{x}{\mathrm{MnO}}_{3}$ $(x=0.35,$0.40,0.50) with the colossal magnetoresistance in order to investigate the lattice effects due to orbital and charge degrees of freedom in the systems. As a result, we observe three types of elastic…
We have developed a multisample film growth method on a temperature-gradient substrate holder to quickly optimize the film growth temperature in pulsed-laser deposition. A smooth temperature gradient is achieved, covering a range of temperatures from 200 to 830 °C. In a single growth run, the optimal growth temperatur…
The high-temperature transformation of ${\mathrm{CsH}}_{2}{\mathrm{PO}}_{4}$ was studied by means of impedance spectroscopy, differential thermal analysis, and thermogravimetric methods. The dielectric constant showed a high-temperature anomaly around ${T}_{p}=230\ifmmode^\circ\else\textdegree\fi{}\mathrm{C}.$ The the…
The manganese oxo-cluster, [Mn 12 O 12 (O 2 CMe) 16 (H 2 O) 4 ]·2(HO 2 CMe)·4(H 2 O), (Mn-12), has been the subject of intense interest for its novel magnetic properties. Although it is a model system for nanoscale magnetic data storage, no methods for forming films or attaching the cluster to surfaces have been repor…
The room temperature magnetization of GaMnN films grown by molecular beam epitaxy on (0001) sapphire substrates with Mn concentrations varying from 0 to 9 at. % was found to depend on Mn concentration, with a maximum magnetization found at ∼3 at. % Mn. High-resolution x-ray diffraction measurements show that the c-pla…
A new beamline (MPW6.2) has been designed and built for the study of materials during processing where three synchrotron techniques, SAXS, WAXS and XAS, are available simultaneously. It has been demonstrated that Rietveld refinable data can be collected from silicon SRM 640b over a 60 degrees range in a time scale of…
The use of nonmagnetic drill collars for the oilfield industry started in the seventies and eighties of the last century with a change in drilling technology. Since then, nonmagnetic Cr-Mn-N steels...
Resonance Raman excitation profiles and absolute cross sections are presented for three closely related merocyanine dyes as monomers in dichloromethane solution and as H-dimers in dioxane solution. For both monomers and dimers the absorption spectra and the resonance Raman intensities of the 24 to 30 strongest vibrati…
ITO layers with low resistivity and high visible transmittance were produced by means of middle frequency reactive dual magnetron sputtering. The influence of base pressure, Ar/O2 ratio and magnetron pulse duration on the film composition, structure, electrical, and optical properties has been investigated. The deposi…
Intense red luminescence in Eu3+-doped gamma (γ) and alpha (α) alumina (Al2O3) phosphors obtained by direct and indirect combustion synthesis at low-temperatures is reported. γ and α-(Al1−xEux)2O3 are easily produced by combustion synthesis at 280 °C in the range of x=0.001–0.06 at. %. The well-defined direct synthesi…
Thermal chemical vapor deposition at temperatures as low as 423 K, using Ru3(CO)12 with no accompanying reactive gas, forms pure, uniform, and smooth Ru films on Ta and low-resistivity films on SiO2. A 2.5-nm-thick Ru film fully covers the underlying Ta and the Ru film is thermally stable up to 573 K. Unlike Ta, Ru fi…