Materials Literature
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We studied the exciton decay dynamics of individual semiconducting single-walled carbon nanotubes at room temperature using time-resolved photoluminescence spectroscopy. The photoluminescence decay from nanotubes of the same (n,m) type follows a single exponential decay function, however, with lifetimes varying betwee…
This study evaluated the effects of the inclusion of growing levels of flour of ‘Seda’ (Calotropis procera SW) hay (FFS) in the diet of Santa Inês lamb as a substitute of forage sorghum (Sorghum bicolor L.) hay (FSF) on animal and carcass biometry, and on the non-constituent components of the carcass. Six replications…
<div class="htmlview paragraph">The introduction of more stringent standards for engine emissions requires continuous improvement of exhaust gas aftertreatment systems. Modern systems require a combined design and application of different aftertreatment devices. Computer simulation helps to investigate the compl…
<div class="htmlview paragraph">Nanocomposites are relatively new material made with various polymers and nano-size inorganic or organic fillers. Nanocomposites have a number of advantages over conventional polymer composites, such as excellent mechanical properties, better durability, high smoothness, thermal s…
Abstract Peak heat release reduction is lower for plasticized PVC composites containing a modified montmorillonite compared to those formulated with the hectorite. One possible explanation is that the char of the sample containing the modified montmorillonite was less cracked. Both clays initiate accelerated HCl relea…
<div class="htmlview paragraph">The increasing need for controlled diesel engine emissions and the strict regulations in the abatement of diesel exhaust products lead to an ever increasing use of Diesel Particulate Filters (DPFs) in OEM applications. The periodic regeneration of DPFs (oxidation of soot particles…
<div class="htmlview paragraph">Today's diesel PM reduction systems are mainly based on catalyzed particulate filter(CPF) systems. However, most of their reaction kinetics remain unresolved. Among others, the soot oxidation rate over catalyst is particularly important in the evaluation of the performance of the…
<div class="htmlview paragraph">The use of Selective Catalytic Reduction (SCR) is becoming increasingly more popular as a way of reducing NO<sub>x</sub> emissions from heavy duty vehicles while maintaining competitive operating costs. In order to make efficient use of these systems, it's important to…
In this study, the electronic structure of AgTlTe has been studied with first-principles calculations. The density of states and band structure were studied in detail. The thermoelectric power, electrical conductivity, and electronic thermal conductivity were analyzed using the Boltzmann transport equation with the as…
This work describes a simple fabrication process to produce a highly flexible bilayer membrane, consisting of a nanoporous gold layer embedded into the surface of a thin elastomer film. The nanoporous gold film shows excellent adhesion due to mechanical interlocking with the elastomer substrate, which penetrates its n…
<div class="htmlview paragraph">Selective Catalytic Reduction of NOx is a promising technology to enable diesel engines to meet certification under Tier 2 Bin 5 emissions requirements. SCR catalysts for vehicle use are typically zeolitic materials known to store both hydrocarbons and ammonia. Ammonia storage on…
Barium-functionalized multiwalled carbon nanotube yarns were fabricated by drawing and twisting multiwalled carbon nanotube forests through a solution containing barium nitrate. After heat activation under vacuum, the functionalized yarns were enriched in barium oxide due to the high surface-to-volume ratio of the nan…
The domain structure in Pb(Mg 1/3 Nb 2/3 )O 3 –32%PbTiO 3 single crystal has been investigated with analytical electron microscopy. It is revealed that the M B phase is an adaptive phase composed of 71° rhombohedral nanodomains and that the nanodomain walls are parallel to {110} planes by a combination of convergent b…
Highly luminescent cadmium telluride (CdTe) nanocrystals were synthesized using Li(2)[Cd(4)(SPh)(10)] as a reactive Cd cluster compound at relatively low temperature, making it a safe precursor for the large scale synthesis of CdTe nanocrystals. Transmission electron microscopy (TEM) showed that the shape of the CdTe…
<div class="htmlview paragraph">A study of the impact of the exhaust environment and catalyst composition on the performance of direct soot oxidation catalysts has been performed. In agreement with previous studies it is noted that contact efficiency between soot and catalyst dictates soot oxidation rate, with t…
We present an angle- and spin-resolved photoemission study of half-metallic three-dimensional perovskite ${\mathrm{La}}_{2∕3}{\mathrm{Sr}}_{1∕3}\mathrm{Mn}{\mathrm{O}}_{3}$ thin films grown with pulsed laser deposition. The experiments are performed in the (100) mirror plane. The experimental results are related to GG…
We observed “one magnon,” scattering in multiferroic polycrystalline BiFeO3 thin films near 17.2cm−1 at 90K employing Raman spectroscopy. It is seen with a kink in magnon intensity at 150K and with strong anomaly near 210K illustrating spin reorientation transition. The spectral weight of one magnon transferred to the…
Abstract Alkoxyamine derivatives based on 2,2,6,6‐tetramethyl‐1‐piperidinyloxy (TEMPO), N ‐ tert ‐butyl‐ N ‐(1‐diethylphosphono‐(2,2‐dimethylpropyl)) nitroxide (SG1) and N ‐ tert ‐butyl‐ N ‐(2‐methyl‐1‐phenylpropyl) nitroxide (TIPNO) containing a C 11 hydrophobic spacer and a reactive triethoxysilyl polar head, were s…
Zn-doped In2O3 nanowires (NWs) were prepared by simple chemical vapor deposition and were systematically characterized. Field-effect transistors (FETs) constructed from the Zn-doped In2O3 nanowires exhibit excellent performance characteristics such as high mobility, “high-on-state” current of 105A and large on/off cur…
Mn-doped GaN epitaxial films (Ga1−xMnxN) were grown on sapphire (0001) by metal organic chemical vapor deposition. Mn concentration was determined by energy dispersive spectrometry. For Ga1−xMnxN with x up to 0.027, no secondary phases except for GaN were detected by high resolution x-ray diffractometer. Raman scatter…