Materials Literature
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<div class="htmlview paragraph">Ash, mostly from essential lubricant additives, affects diesel particulate filter (DPF) pressure-drop sensitivity and limits filter service life. It raises concern in the lubricant industry to properly specify new oils, and engine and aftertreatment system manufacturers have attem…
Hybridization of single-stranded DNA immobilized on the surface of gold nanoparticles (GNPs) into double stranded DNA and its subsequent dissociation into ssDNA were investigated. Melting curves and rates of dissociation and hybridization were measured using fluorescence detection based on hybridization-induced fluore…
Tetrakis(naphthoyltrifluoroacetonato)lanthanate(III) complexes (Ln = Eu, Gd) containing the cations tetrabutylammonium, [NBu(4)](+); 1-butyl-3-methylimidazolium, [C(4)mim](+); and 1-butyl-3-methylpyridinium, [C(4)mpyr](+), have been prepared and structurally characterized by single-crystal X-ray diffraction. The {EuO(…
We study a diffuse interface model for the flow of two viscous incompressible Newtonian fluids in a bounded domain. The fluids are assumed to be macroscopically immiscible, but a partial mixing in a small interfacial region is assumed in the model. Moreover, diffusion of both components is taken into account. In contr…
<div class="htmlview paragraph">This summary covers representative developments from 2008 in diesel regulations, engine technology, and NOx, particulate matter (PM), and hydrocarbon (HC) control.</div> <div class="htmlview paragraph">Europe is finalizing the Euro VI heavy-duty (HD) regulations for 20…
LaAlO 3:Tm 3+ and LaAlO 3:Tb 3+ phosphors were prepared through a Pechini-type sol−gel process. X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), photoluminescence, and cathodoluminescence (CL) spectra were utilized to characterize the synthesized phosphors. The XRD results reveal that the…
BACKGROUND: There is an immense clinical need for novel therapeutics for the treatment of angiogenesis-dependent calcified neoplasms such as osteosarcomas and bone metastases. We developed a new therapeutic strategy to target bone metastases and calcified neoplasms using combined polymer-bound angiogenesis inhibitors.…
The Bi1.5MgNb1.5O7 thin films with cubic pyrochlore structure were prepared onto Pt-coated sapphire substrates by rf magnetron sputtering deposition from a stoichiometric target. Dielectric measurements indicated that the Bi1.5MgNb1.5O7 thin films exhibited low dielectric loss of ∼0.0018–0.004, medium dielectric const…
A template-directed and surface-modified method for the facile synthesis of polypyrrole (PPy) or polyaniline (PAni) hollow spheres having smooth surface, uniform wall thickness, and a range of controllable sizes is developed. The use of these biocompatible hollow spheres as a new class of contrast agents for sonograph…
We describe an infrared transmission study of a thin layer of bulk graphite in magnetic fields up to B=34 T. Two series of absorption lines whose energy scales as sqrt[B] and B are present in the spectra and identified as contributions of massless holes at the H point and massive electrons in the vicinity of the K poi…
Co 2+ -doped TiO 2 nanopowders have been synthesized via one-step Ar/O 2 RF thermal plasma oxidizing mists of liquid precursors containing titanium tetra- n -butoxide and cobalt (II) nitrate. Co 2+ doping was found to steadily promote rutile crystallization. The solubility of Co 2+ in the TiO 2 lattice was determined…
Room-temperature ferromagnetism occurs in GaN nanoparticles even without any doped magnetic ions. The cause for this finding was examined by performing density functional calculations for the bulk GaN and the nonpolar surface of GaN with Ga- and N-vacancies. Our work indicates that the room-temperature ferromagnetism…
We report on a photoconductive gain effect in two-dimensional arrays of gold nanoparticles (NPs) in which alkane molecules are inserted. The NP arrays are formed by a self-assembly process from alkanethiol-coated gold NPs, and subsequently they are patterned on a Si/SiO2 chip by a microcontact printing technique. We f…
W-based granular metals have been prepared by electron-beam-induced deposition from the tungsten hexacarbonyl W(CO)(6) precursor. In situ electrical conductivity measurements have been performed to monitor the growth process and to investigate the behavior of the deposit under electron beam post-irradiation and by exp…
We report the pressure and temperature dependence of the phonon density-of-states in superconducting ${\text{Ca}}_{0.6}{\text{Na}}_{0.4}{\text{Fe}}_{2}{\text{As}}_{2}$ $({T}_{c}=21\text{ }\text{K})$ and the parent compound ${\text{CaFe}}_{2}{\text{As}}_{2}$ using inelastic neutron scattering. We observe no significant…
We have computed the spectrum emitted spontaneously by a quantum dot coupled to an arbitrarily detuned single mode cavity, taking into account pure dephasing processes. We show that if the emitter is incoherent, the cavity can efficiently emit photons with its own spectral characteristics. This effect opens unique opp…
Abstract While emulsions stabilized by colloidal solid particles have been widely used for industrial and consumer applications, their use for enhanced oil recovery purposes has been very limited. This is because the colloidal solids generally cannot be transported long distances within oil reservoirs, e.g. from injec…
Hexagonal sheets of colloidal particles self-assemble in a biaxial electric field and can be made permanent by thermal annealing. One can also rapidly switch the suspension structure from isotropic, to 1D ‘strings’ and 2D ‘sheets’, which is useful for applications that require anisotropic suspension properties. Thus,…
Temperature-dependent magnetotransport measurements in magnetic fields of up to 12 T were performed on thin-film vanadium dioxide $({\text{VO}}_{2})$ across the metal-insulator transition (MIT). The Hall carrier density increases by 4 orders of magnitude at the MIT and accounts almost entirely for the resistance chang…
The harnessing of the nanoscale properties of nanoparticles in most technological applications requires the abilities of controlled processing and assembly, which has been an important challenge because of the difficulty in manipulating interparticle properties. Molecularly mediated processing and assembly of nanopart…