Materials Literature
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We have applied small angle neutron scattering (SANS), diffusing wave spectroscopy (DWS), and dynamic light scattering (DLS) to investigate the phase diagram of a sterically stabilized colloidal system consisting of octadecyl grafted silica particles dispersed in toluene. This system is known to exhibit gas-liquid pha…
Nano particles of Mn0.5-x Nix Zn0.5Fe2-xO4 (X = 0.0, 0.1, 0.2, 0.3) have been synthesized by chemical co precipitationmethod. X-ray diffraction analysis confirms the formation of ferrites in nano phase. Lattice constant and particle sizeis found to be decreasing with increasing nickel concentration. The porosity calcu…
Abstract The room‐temperature ferromagnetism and the Raman spectroscopy of the Cu‐doped Zn 1− x Co x O powders prepared by the sol–gel method are reported. The x‐ray diffraction (XRD) data confirmed that the wurtzite structure of ZnO is maintained for ZnO doped with Co below 10 at%. The magnetization–field curves meas…
Abstract An alkylammonium intercalated montmorillonite (A‐MMT) was modified by edge grafting with 3‐glycidoxypropyltrimethoxysilane. In comparison with poly(ethylene terephthalate) (PET)/A‐MMT, the resultant grafted clay, S‐A‐MMT, exhibited improved miscibility with PET matrix and revealed better dispersion state in t…
We have studied the electronic structure of the Fe and Ni triangular lattices in ${\text{FeGa}}_{2}{\text{S}}_{4}$, ${\text{Fe}}_{2}{\text{Ga}}_{2}{\text{S}}_{5}$, and ${\text{NiGa}}_{2}{\text{S}}_{4}$ using photoemission spectroscopy measurements, configuration-interaction calculations on ${\text{FeS}}_{6}$ and ${\te…
<div class="htmlview paragraph">A promising SCR-only solution is presented to meet post-2010 NO<sub>x</sub> emission targets for heavy duty applications. The proposed concept is based on an engine from a EURO IV SCR application, which is considered optimal with respect to fuel economy and costs. The…
Abstract The morphology, nucleation, and crystallization of polyethylene/carbon nanotubes composites prepared by solution crystallization method of high density polyethylene on Multiwall Carbon Nanotubes (MWNTs) are studied. Transmission electron microscopy (TEM) results show that the center stems of MWNTs are decorat…
Abstract Melamine polyphosphate (MpolyP) was used to flame retard polyamide‐6 filled with siliciferous fillers including fibrous wollastonite, laminar talc, and spherical glass bead. The mechanical performance, flame retardancy of these flame retarded materials, and the influence of these fillers on charring behavior…
Abstract Matrix acidizing is used in carbonate formations to create flow channels from the formation to the well bore, whereas in sandstone formations the goal is to dissolve materials that impair the well production. However, the use of acids in deep wells has some major drawbacks including high reaction rate and cor…
<div class="htmlview paragraph">The upcoming Euro VI emission legislation for Heavy Duty Diesel engines can be complied with by using a combination of a wall flow DPF and a UREA SCR-system. This paper describes investigations of NO<sub>x</sub> and PM reduction by a combination of SCR-catalyst and an…
<div class="htmlview paragraph">For diesel applications, cold start accounts for a large amount of the total NO<sub>x</sub> emissions during a typical Federal Test Procedure (FTP) for light-duty vehicles and is a key focus for reducing NO<sub>x</sub> emissions. A common form of diesel NO&…
The emission reduction from diesel engines is one of major issues in heavy duty diesel engines. Super Clean Diesel (SCD) Engine for heavy-duty trucks has also been researched and developed since 2002. The main specifications of the SCD Engine are six cylinders in-line and 10.5 l with a turbo-intercooled and cooled EGR…
Charge-carrier transport in multilayer structures of Si nanocrystals (NCs) embedded in a SiO(2) matrix grown by magnetron sputtering has been investigated. The presence of two types of Si NCs with different diameters after post-growth annealing is concluded from transmission-electron microscopy and photoluminescence m…
<div class="htmlview paragraph">In this work a detailed model to simulate the transient behavior of catalytic converters is presented. The model is able to predict the unsteady and reacting flows in the exhaust ducts, by solving the system of conservation equations of mass, momentum, energy and transport of reac…
<div class="htmlview paragraph">Although diesel engines are superior to gasoline engines in terms of the demand to reduce CO<sub>2</sub> emissions, diesel engines suffer from the problem of emitting Particulate Matter (PM). Therefore, a Diesel Particulate Filter (DPF) has to be fitted in the engine e…
<div class="htmlview paragraph">Active regeneration experiments were performed on a Cummins 2007 aftertreatment system by hydrocarbon dosing with injection of diesel fuel downstream of the turbocharger. The main objective was to characterize the thermal oxidation rate as a function of temperature and particulate…
Electric-field-induced catalytic growth of cadmium selenide nanowires from solution is demonstrated. Our approach highlights the importance of electric field and surface-charge density for catalytic nanowire growth. In addition, this method is compatible with conventional silicon-based technology, and we demonstrate i…
Technical details concerning the simultaneous acquisition of three impedance functions (electrochemical impedance spectroscopy, alternating current electrogravimetry or mass impedance, and alternating current colorimetry or color impedance) are presented. The analysis of each type of impedance function gives interesti…
<div class="htmlview paragraph">Establishing a certain maintenance-free time period regarding modern diesel exhaust emission control systems is of major importance nowadays. One of the most serious problems Diesel Particulate Filter (DPF) manufacturers face concerning system's durability is the performance deter…
Abstract One of the main drawbacks of wood fiber‐based composite materials is their propensity to swell due to moisture uptake. Because the wood fibers are usually the main contributor to hygroexpansion, it is of interest to quantify the hygroexpansion coefficient of wood fibers, to compare and rank different types of…