Materials Literature
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We evaluate the density of states (DOS) associated with tridiagonal symmetric Hamiltonian matrices and study the effect of perturbation on one of its entries. Analysis is carried out by studying the resulting three-term recursion relation and the corresponding orthogonal polynomials of the first and second kind. We fo…
Space-grade Si and GaAs solar cells were irradiated with 15 & 40 MeV Li ions. Illuminated (AM0 condition) and unilluminated I-V curves reveal that the effect of high-energy Li ion irradiation has produced similar effects to that of proton irradiation. However, an additional, and different, defect mechanism is suggeste…
We propose FeSb2 to be a nearly ferromagnetic small gap semiconductor, hence a direct analog of FeSi. We find that despite different compositions and crystal structures, in the local density approximation with on-site Coulomb repulsion correction (LDA+U) method magnetic and semiconducting solutions for U=2.6 eV are en…
The mechanism for resonant scattering in LaMnO(3) has been the subject of some controversy between two models. Model (A) is based on orbital ordering, whereas model (B) invokes the Jahn-Teller distortion. From the structural point of view, the two models lead to different d-electron densities. The forbidden reflection…
Flexible honeycomb gold films supported by polymer sheets are fabricated by using polystyrene particle monolayers. The surfaces of the flexible gold films are covered with self-assembled monolayers (SAMs) of hydrophobic or hydrophilic thiol compounds, and the wettability of the modified surface is evaluated by measure…
Abstract Hematite (α-Fe2O3) hollow spheres were prepared by using carbon microspheres as the template. The products exhibit excellent catalytic performances and can catalyze the oxidation of almost 100% carbon monoxide at 315 °C.
The limitation of fossil fuel resources and the necessity of reducing CO 2 emission require an increase of the efficiency of power plants by using combined cycle power systems. The pressurized pulverized coal combustion (PPCC) combined cycle is a coal fired combined cycle concept which is able to achieve efficiencies…
The synthesis and characterization of six new spin-crossover (SCO) materials [FeL D x (NCX) 2 ] ( 1: X = S, x = 1; 2: X = Se, x = 1; 3: X = S, x = 2; 4: X = Se, x = 2; 5: X = S, x = 3; 6: X = S, x = 4) are reported, where L D1 −L D4 stand for the dissymmetrical tetradentate ligands obtained by 1:1:1 Schiff base conden…
The synthesis, characterization, and spectroscopy of upconverting lanthanide-doped NaYF<sub>4</sub> nanocrystals (NCs) is presented. The monodisperse\ncubic NaYF<sub>4</sub> NCs were synthesized via a thermal decomposition reaction of trifluoroacetate precusors in a mixture of technical grade c…
Acidization is the process of injecting acid into porous oil bearing formations to dissolve minerals in the pore space and is a common technique to increase oil production. Analcime is a zeolite which is one of the minerals found in oil reservoirs in the Gulf of Mexico. This mineral is particularly troublesome during…
In this paper, the interaction between the water-soluble conjugated polyelectrolyte poly{1,4-phenylene[9,9-bis(4-phenoxybutylsulfonate)]fluorene-2,7-diyl} copolymer and the amino acid glyceride conjugate 1-O-(L-arginyl)-2,3-O-dilauroyl-sn-glycerol dichlorohydrate (a mimic for the phospholipid lecithin) has been studie…
Polar order in the biosphere is limited to nanometer-sized domains, occurs with essentially complete cancellation, or is avoided on purpose. One thus wonders whether large-scale polar order is even possible, and this question is the subject of the dipole alignment problem. We addressed this challenge with an interdisc…
Pyrroloquinoline quinone (PQQ) forms a tridentate complex with coordinatively unsaturated titanium atoms on the surface of approximately 4.5 nm TiO2 particles; an association constant of K = 550 M-1 per Ti(IV)surf has been determined. Low-temperature electron paramagnetic resonance was employed in identification of lo…
The stable water-soluble tantalum complex with lactic acid (ammonium tetralactatodiperoxo-mu-oxo-ditantalate(V)), (NH4)4[Ta2(C3H4O3)4(O2)2O].3H2O, was prepared in the crystalline form. According to the single-crystal X-ray diffraction data, this compound forms a monoclinic cell with a = 13.85(2) A, b = 9.06(1) A, c =…
Precession electron diffraction (PED) is a method that considerably reduces dynamical effects in electron diffraction data, potentially enabling more straightforward solution of structures using the transmission electron microscope. This study focuses upon the characterization of PED data in an effort to improve the u…
The development of polymeric dental composites has revolutionized the field of dentistry over the past 30 years. This development has been achieved mainly through organic monomer discovery, modifications in formulation and filler technology, advances in light curing equipment and efficient photoinitiators. Despite the…
Polyelectrolyte−nanoparticle hybrid multilayer films were used as templates for the preparation of nanoporous polymer thin films. The hybrid multilayers were constructed by consecutively depositing an anionic blend of silica nanoparticles (SiO 2 NPs) and poly(acrylic acid) (PAA) and a cationic polyelectrolyte, poly(al…
Calcium dodecyl sulfate (CDS) was used for the first time both as an anionic surfactant and as the source of mineral ions in the precipitation process of calcium carbonate (CaCO3). The simple reaction of the enriched Ca2+ ions at the so-called organic-inorganic interfaces with the slowly bubbled CO2 gas resulted in th…
Organic-inorganic hybrid particles have many potential applications, but almost all of this research was focused on the hybrid particles containing one kind of inorganic nanoparticles. This paper presented a facile preparation method for SiO2/PS/TiO2 multilayer core-shell hybrid microspheres. In this approach, positiv…
As a promising one-dimensional material for building nanodevices, single-wall carbon nanotubes (SWNTs) should be organized into a rational architecture on the substrate surface. In this study, horizontally aligned SWNTs with two alignment modes were synthesized on the same R-plane sapphire wafer by chemical vapor depo…