Materials Literature
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We report element specific structural and magnetic investigations on Zn(1-x)Co(x)O epitaxial films using synchrotron radiation. Co dopants exclusively occupy Zn sites as revealed by x-ray linear dichroism having an unprecedented degree of structural perfection. Comparative magnetic field dependent measurements by x-ra…
Abstract The sophistication with which we can now prepare and characterize inorganic nanoparticles has inspired new areas of research into the fundamental properties and applications of these fascinating nanoscale systems. In this article some of the recent ideas concerning control of their optical properties are exam…
Single crystalline nanowires of 2,4,5-triphenylimidazole, a small organic functional compound, are prepared by adsorbent-assisted physical vapor deposition. As-prepared nanowires are shown to propagate multimode UV light and serve as single wire active optical waveguides and optically driven ultraviolet lasers (see fi…
The nitrogen-vacancy center in diamond is a promising candidate for realizing the spin qubits concept in quantum information. Even though this defect has been known for a long time, its electronic structure and other properties have not yet been explored in detail. We study the properties of the nitrogen-vacancy cente…
CdSe quantum dots (QDs) were adsorbed onto nanostructured TiO2 films for different times by using a chemical bath deposition method in order to produce QD-sensitized solar cells (QDSSCs). Surface modification was done by coating ZnS onto the CdSe QDs. The optical absorption and current-voltage characteristics of these…
Chapter 1. The Study of Corrosion Chapter 2. Corrosion Basics Chapter 3. Corrosion Electrochemistry Chapter 4. Corrosion Thermodynamics Chapter 5. Corrosion Kinetics and Applications of Electrochemistry to Corrosion Chapter 6. Recognizing the Forms of Corrosion Chapter 7. Corrosion Failures, Factors, and Cells Chapter…
Bacterial cellulose (BC) pellicles consist of a layered structure of planar nanofiber networks, which enables the production of optically transparent composites with an ultralow coefficient of thermal expansion comparable to that of silicon crystal. The BC nanofiber networks suppress crack propagation in the brittle m…
The dramatic visible light photocatalytic activity was obtained for the degradation of Methylene Blue (MB) and Rhodamine B (RhB) under visible light irradiation (lambda > 450 nm) after TiO2 photocatalysts were modified with monolayer dispersed polyaniline (PANI) via a facile chemisorption approach. Under visible light…
Amyloid fibers constitute one of the most abundant and important naturally occurring self-associated assemblies. A variety of protein and peptide molecules with various amino acid sequences form these highly stable and well-organized assemblies under diverse conditions. These assemblies display phase states ranging fr…
<div class="htmlview paragraph">One way to insure a fast and complete regeneration of a Diesel Particle Filter (DPF) is to add a Fuel Borne Catalyst (FBC) to the Fuel. In Europe, 3 million passenger cars are equipped with this technology without any recall.</div> <div class="htmlview paragraph">Rhodi…
<div class="htmlview paragraph">This paper constructed a parallel type hybrid-electric bus model based on GM-Allison system which is consisted of three planetary gear-sets and two motors. The simulation model is modified from the backward-looking simulation of ADVISOR. The hybrid-electric bus (HEB) is simulated…
<div class="htmlview paragraph">A computational, three-dimensional approach to investigate the behavior of diesel soot particles in the micro-channels of wall-flow Diesel Particulate Filters is presented. The <i>KIVA3V</i> CFD code, already extended to solve the 2D conservation equations for porous m…
<div class="htmlview paragraph">Catalyzed wall-flow particulate filters are increasingly applied in diesel exhaust after-treatment for multiple purposes, including low-temperature catalytic regeneration, CO and hydrocarbon conversion, as well as exothermic heat generation during forced regeneration. In order to…
<div class="htmlview paragraph">Future NOx-emission standards for diesel engines imply an after treatment system, e.g. in the form of an NH<sub>3</sub>-SCR system. For the technical realization a sound understanding of the catalytic processes is mandatory. To gain this knowledge a model of the SCR of…
<div class="htmlview paragraph">In the current paper, three dimensional fluid flow and pressure loss characteristics are investigated numerically for the geometry of a catalytic converter with two substrates inside. Various relative positions of two substrates are considered: air gap widths in the axial directio…
<div class="htmlview paragraph">An active oxidation catalyst is an efficient measure to reduce not only gaseous components (CO, HC), but also particle emissions (mostly oil condensates) of a small 2-stroke engine with lost oil lubrication.</div> <div class="htmlview paragraph">Since the 2- and 3-whee…
<div class="htmlview paragraph">Future emission limits of diesel engines require additional effort to develop advanced after-treatment devices. The Urea-SCR system is a promising device to reduce NOx emissions. The purpose of this work is to reduce NOx emissions from a Light Duty Vehicle (LDV) with a Urea-SCR (S…
<div class="htmlview paragraph">Acidic zirconia materials have been tested as catalysts for the Selective Catalytic Reduction of nitrogen oxides (NOx) by ammonia (NH<sub>3</sub>-SCR). This paper focuses on the promotion of acidic zirconia by ceria. The introduction of ceria increases the NOx conversi…
Bipolar doping in wide bandgap semiconductors is difficult to achieve under equilibrium conditions because of the spontaneous formation of compensating defects and unfavorable energetics for dopant substitution. In this work, we explored the use of rapid pulse thermal processing for activating nitrogen dopants into ac…
Temperature programmed reduction by CO, H2, and propylene (C3H6), as well as hydrothermal aging in the presence of mixture of NO, HC, CO, H2 and O2 were used to study the deactivation of Cu/zeolite SCR catalysts. The presence of CO had no detrimental effect on catalyst activity. Carbonaceous deposit on the catalyst su…