Materials Literature
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Organic–inorganic hybrid hollow spheres are prepared by using a TiO2-stabilized Pickering emulsion polymerization method (see figure). By self-organization of TiO2 nanoparticles at the interface of oil (monomer and solvent) and water, colloidosomes are formed and used as polymerization vessels to obtain the hybrid hol…
We have applied the perturbation theory for calculating the piezoelectric potential distribution in a nanowire (NW) as pushed by a lateral force at the tip. The analytical solution given under the first-order approximation produces a result that is within 6% from the full numerically calculated result using the finite…
Multiple exciton generation (MEG) is a process whereby multiple electron-hole pairs, or excitons, are produced upon absorption of a single photon in semiconductor nanocrystals (NCs) and represents a promising route to increased solar conversion efficiencies in single-junction photovoltaic cells. We report for the firs…
Mesoporous silica nanoparticles (MSNs) are introduced as chemically and thermally stable nanomaterials with well-defined and controllable morphology and porosity. It is shown that these particles possess external and internal surfaces that can be selectively functionalized with multiple organic and inorganic groups. O…
<div class="htmlview paragraph">A range of tools including analytical, bench, and engine tests have been used to investigate the viscosity increase mechanism and formulation appetite of the Sequence IIIG engine test. As commonly observed with high temperature tests, the Sequence IIIG has a strong appetite for an…
<div class="htmlview paragraph">In recent years, emission regulations have become more stringent as a result of increased environmental awareness in each region of the world. For diesel engines, reducing NO<sub>X</sub> emissions is a difficult technical challenge.[<span class="xref">1</span&…
A new concept based on the theory of Dammann gratings is proposed for the generation of circular optical beams. This grating shows that it can achieve equal intensity and equal spacing with acceptable efficiency that is controlled by set of transition points. A numerical solution is also presented together with the fa…
<div class="htmlview paragraph">The increasing demands and strict regulations in diesel emission control leads to an ever-increasing use of Diesel Particulate Filters (DPFs) in OEM applications. To accelerate the oxidation of soot particles collected in the DPF we have developed novel catalytic coatings with a v…
The magnetotransport properties of ${\mathrm{La}}_{0.7}{\mathrm{Sr}}_{0.3}\mathrm{Mn}{\mathrm{O}}_{3}∕\mathrm{Co}{\mathrm{Fe}}_{2}{\mathrm{O}}_{4}∕\mathrm{Nb}(0.5%):\mathrm{Sr}\mathrm{Ti}{\mathrm{O}}_{3}$ junctions were investigated. At low temperatures, these junctions show a magnetoresistance strongly dependent on c…
We investigated the magnetic properties of the Pr 0.5− x Nd x Sr 0.5 MnO 3 ( x =0, 0.1, 0.2, 0.3, 0.4, 0.5) system. Since the two end samples Pr 0.5 Sr 0.5 MnO 3 and Nd 0.5 Sr 0.5 MnO 3 are A-type and CE-type AFM at low temperatures, respectively, due to their different orbital ordering d ( x 2 − y 2 ) and d (3 x 2 −…
<div class="htmlview paragraph">The development of advanced Catalytic Diesel Particulate Filters (CDPFs) relies on the interplay of chemistry and geometry in order to enhance soot-catalyst proximity and achieve direct catalytic soot oxidation. An extensive set of well-controlled experiments has been performed to…
<div class="htmlview paragraph">High-pressure metal hydride (MH) tank has been designed based on a 35 MPa cylinder vessel. The heat exchanger module is integrated into the tank. Its advantage over high-pressure cylinder vessels is its large hydrogen storage capacity, for example 9.5 kg with a tank volume of 180…
D-alpha-tocopheryl polyethylene glycol succinate (TPGS) has been utilized in numerous drug delivery formulations in recent years. Because of its amphiphilic structure, it can be used as emulsifier and vehicle for lipid-based drug delivery formulations. It is also an effective P-glycoprotein (P-gp) inhibitor. However,…
Abstract We consider a singular perturbation of the generalized viscous Cahn–Hilliard equation based on constitutive equations introduced by Gurtin. This equation rules the order parameter ρ, which represents the density of atoms, and it is given on a n ‐rectangle ( n ⩽3) with periodic boundary conditions. We prove th…
<div class="htmlview paragraph">A new state of the art DOC (Diesel Oxidation Catalyst) having superior light-off and exothermic activity for forced regeneration compared to conventional Pt base passive DOC, was investigated for LDD application.</div> <div class="htmlview paragraph">The DOC uses the l…
Optical trapping of silver nanoparticles dispersed with rhodamine 6G (R6G) and NaCl in water gives surface-enhanced hyper-Raman scattering (SEHRS) of R6G. In this paper we have measured the SEHRS spectrum in the R6G concentration range between 10−7 and 10−11 M. SEHRS intensity and signal-to-noise ratio show clear diff…
<div class="htmlview paragraph">A novel base metal-palladium catalytic coating was applied on commercial silicon carbide wall flow diesel filters and tested in an engine test bench. This catalytic coating limits the NO<sub>2</sub> formation and even removes NO<sub>2</sub> within a wide te…
The authors report a type of photoluminescence upconversion that is directly attributable to the strong quantum confinement of charge carriers in PbS nanocrystals and does not involve the usual mechanism of thermally populated intermediate states. Absorption, emission, and excitation spectroscopy, combined with a simp…
<div class="htmlview paragraph">The authors evaluated the durability of current zeolite-type SCR (Selective Catalytic Reduction) catalyst system in terms of poisoning from engine oil components, such as phosphorus, sulfur, calcium and zinc. The engine oil types used included typical CF-4, a sulfur-free type and…
Abstract Poly(glycidyl methacrylate) (PGMA) beads with an average size of 350 μm were synthesized by suspension polymerization technique. The PGMA beads were first modified with iminodiacetonitrile (IDAN). Then, the IDAN‐modified beads were subsequently modified by hydroxylamine. The IDAN modification and the conversi…