Materials Literature
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The synthesis, structural, luminescent, and magnetic properties of multifunction 8 at. % Eu-doped Gd2O3 nanocrystals were investigated. The material was synthesized by the solution combustion technique and characterized by x-ray diffraction (XRD), transmission electron microscopy, and photoluminescence and magnetizati…
Magnetic iron metal-silica and magnetite-silica nanocomposites have been prepared via temperature-programed reduction (TPR) of an iron oxide-SBA-15 (SBA: Santa Barbara Amorphous) composite. TPR of the starting SBA-15 supported Fe(2)O(3) generated Fe(3)O(4) and FeO as stepwise intermediates in the ultimate formation of…
Pigment-grade TiO(2) particles were passivated using nanothick insulating films fabricated by atomic layer deposition (ALD). Conformal SiO(2) and Al(2)O(3) layers were coated onto anatase and rutile powders in a fluidized bed reactor. SiO(2) films were deposited using tris-dimethylaminosilane (TDMAS) and H(2)O(2) at 5…
The crystal structure of perovskite LaCr(1 - x)Ni(x)O(3) (0 < or = x < or = 1.0) has been systematically investigated by analyzing X-ray powder-diffraction data taken at room temperature. Rietveld refinement has confirmed the structural evolution from the orthorhombic phase (Pbnm, Z = 4) to the two-phase (the orthorho…
We investigate the nonlinear dynamics of four-wave mixing in molecular magnets, and show that the matched and coupled electromagnetic soliton pairs can be formed in molecular magnets via a four-wave mixing. It is shown that both bright and dark soliton pairs can propagate through a crystal of molecular magnets and the…
A series of oligothiophene dications doped with Cl 3 − ions were studied using density functional theory (DFT) at the B3LYP/6−31G(d) level. The balance between the bipolaron and polaron pair states was addressed by studying the closed-shell singlet, open-shell singlet, and triplet states of oligothiophene divalent sal…
In this study, we demonstrate a new insight into the growth stage of aqueous semiconductor nanocrystals (NCs); namely, that the experimental variable-dependent growth rate and photoluminescence quantum yields (PLQYs) are understandable according to electrostatics. In this context, the aqueous NCs possess (from core ou…
We conducted a detailed study of the yellow luminescence (YL) band that has a maximum of 2.19eV at 10K in undoped and N-doped ZnO layers grown on sapphire substrates. Important characteristics of this band and the related defect are established. The YL band is attributed to a transition between a shallow donor and an…
Luminescence properties and their photoinduced control of the electric dipole transitions of a Eu(III) complex that has photochromic triangle terarylenes ligands, tris(hexafluoroacetylacetonato)bis[4,5-bis(5-methyl-2-phenylthiazol-4-yl)-2-phenylthiazole]europium(III) (Eu(hfa)3(THIA)2), were studied. Fairly high photoc…
A vanadium dioxide (VO2) thin film planer-type junction fabricated on an Al2O3 (0001) substrate, possessing an infinite negative-differential-resistance region in their current-voltage characteristics, acts as an oscillator of high efficiency. A voltage application to the pair of a VO2 junction and a load resistor dri…
We report on the influence of the improved L21 ordering degree on the magnetic properties of Co2MnSi Heusler films. Different fractions of the L21 phase are obtained by different postgrowth annealing temperatures ranging from 350 °C to 500 °C. Room temperature magneto-optical Kerr effect measurements reveal an increas…
This paper describes the synthesis of a new cyclic carbonate AB 2 type monomer, 5-{3-[(2-hydroxyethyl)thio]propoxy}-1,3-dioxan-2-one ( 5 ), and its application for preparation of hyperbranched polymers. In addition, a linear analogue of poly( 5 ) was prepared, and the structures were compared by means of 13 C NMR. Rin…
The electronic properties, band gap, and ionization potential of zigzag and armchair graphene nanoribbons are calculated as a function of the number of carbon atoms in the ribbon employing density functional theory at the B3LYP6-31G* level. In armchair ribbons, the ionization potential and band gap show a gradual decr…
Recently, the application of nanosized magnetite particles became an area of growing interest for their potential practical applications. Nanosized magnetite samples of 36 and 9nm sizes were synthesized. Special care was taken on the right stoichiometry of the magnetite particles. Mössbauer spectroscopy measurements w…
A simple method for protein detection and quantification has been developed by taking advantage of the aggregation-induced fluorescence change of anionic water-soluble conjugated polymers. These polymers contain charged carboxylate groups and a π-electron delocalized optically active backbone composed of fluorene segm…
We study the stability and evolution of various elastic defects in a flat graphene sheet and the electronic properties of the most stable configurations. Two types of dislocations are found to be stable: 'glide' dislocations consisting of heptagon–pentagon pairs, and 'shuffle' dislocations, an octagon with a dangling…
Multi-wall carbon nanotubes (MWCNTs)-3 mol% yttria-stabilized zirconia (3Y-TZP) (MWCNTs-3Y-TZP) composite was prepared by spark plasma sintering. The complex permittivities of the composite have been measured in the Ku-band range (12.4-18 GHz) and it is found that both the real and imaginary permittivities of the comp…
Abstract The synthesis by electropolymerization, the characterization, and applications of poly(neutral red) (PNR), including as a redox mediator, are reviewed. PNR's high electrical conductivity and its redox characteristics have led to special applications of the polymer, and it has been used for the development of…
Abstract A new route to high‐performance electrospun polymer fibers was developed using a self‐bundling electrospinning technique combined with post‐treatments such as stretching and annealing under conditions similar to those used for conventional fibers. Self‐bundled electrospun PAN fiber yarns were characterized by…
Nanoparticle-based probes are emerging as alternatives to molecular probes due to their various advantages, such as bright and tunable optical property, enhanced chemical and photochemical stability, and ease of introduction of multifunctionality. This work presents a simple and general approach for functionalizing va…