Materials Literature
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The synthesis of a transition metal nitride, Ta 3 N 5, was studied. Morphological changes of Ta 3 N 5 particles, depending on the synthetic method, starting materials, and nitridation conditions, were examined in detail. Flux-assisted nitridation was found to be a facile one-step route to a metal nitride with morpholo…
The bright ideas flow: A simple extraction strategy involving quaternary ammonium salts with a poly(ethylene glycol) chain as a phase-transfer reagent provided a route to solvent-free fluxible quantum dots. The products are monodisperse and show low viscosity and excellent photoluminescence (see picture).
The effects of molecular weight and concentration of plasticizer on physicochemical properties and stability of shellac films were investigated. Type of plasticizer was previously reported to have some effects on the stability of shellac films, and polyethylene glycol (PEG) was the plasticizer of choice for plasticizi…
Thermal properties and nonisothermal crystallization kinetics of polyolefin nanocomposites (high-density polyethylene/multiwalled carbon nanotubes) were characterized by differential scanning calorimetry and thermogravimetric analysis. In situ metallocence polymerization was used to prepare nanocomposites of multiwall…
The effects of structural and geometrical characteristics of wash-coated monolith catalysts on the NO-NO 2 /NH 3 selective catalytic reduction (SCR) activity were experimentally investigated over the same Cu-exchanged zeolite system coated onto honeycomb cordierite substrates with different cell densities, lengths, wa…
Soft x-ray absorption experiments on the transition-metal ${L}_{2,3}$ edge of multiferroic ${\text{MnWO}}_{4}$ and antiferromagnetic ${\text{CoWO}}_{4}$ are presented. The observed linear polarization dependence, analyzed by full-multiplet calculations, is used to determine the ground-state wave function of the magnet…
Using aberration-corrected transmission electron microscopy combined with first-principles calculations, we show that the surface structure of Co3O4, a typical complex oxide, can be directly imaged and quantitatively analyzed at the subangstrom scale. The atomic positions of both light oxygen and heavier cobalt within…
Chorismate mutase is at the centre of current controversy about fundamental features of biological catalysts. Some recent studies have proposed that catalysis in this enzyme does not involve transition state (TS) stabilization but instead is due largely to the formation of a reactive conformation of the substrate. To…
We investigated edge configuration and quantum confinement effects on electron transport in armchair-edged graphene nanoribbons (A-GNRs) by using a computational approach. We found that the edge bond relaxation has a significant influence not only on the bandgap energy but also on the electron effective mass. We also…
Abstract Layer‐structured poly(vinyl alcohol)/graphene oxide nanocomposites in the form of films are prepared by simple solution processing. The structure and properties of these nanocomposites are studied using X‐ray diffractions, scanning electron microscopy, Fourier‐transform infrared spectroscopy, differential sca…
Eu3+-Doped CdS hexagonal nanocrystals (NCs), with an average size of ∼4 nm, have been prepared through a simple methodology based on the direct precipitation of CdS NCs using 1-thioglycerol as a capping molecule. Steady-state and time-resolved photoluminescence studies (14–300 K) reveal an effective CdS NCs-to-Eu3+ en…
Transparent and conducting indium tin oxide (ITO) thin films form an integral part for various optoelectronic devices. In this paper, we report the frequency-dependent complex conductivities and dielectric responses of several sputtered ITO thin films with thicknesses in the range of 189–962 nm by using terahertz time…
This work explores the sensitization of luminescent lanthanide Tb(3+) and Eu(3+) cations by the electronic structure of zinc sulfide (ZnS) semiconductor nanoparticles. Excitation spectra collected while monitoring the lanthanide emission bands reveal that the ZnS nanoparticles act as an antenna for the sensitization o…
Enhanced photoelectric conversion is demonstrated in a crystalline silicon (c-Si) solar cell with frustum nanorod arrays (FNAs), fabricated using colloidal lithography and reactive-ion etching techniques. Under a simulated one-sun condition, the cell with FNAs improves the power conversion efficiency by nearly 30%, co…
We demonstrate thermally controlled plasmon resonance modulation of single gold nanoparticles on vanadium dioxide thin films by performing dark-field spectroscopy measurements at different temperatures. The plasmon resonance of the nanoparticles exhibits a significant blueshift in the visible range when the vanadium d…
A straightforward approach to the synthesis of electrically conducting PEDOT thin films using metastable and organic-solvent processable mixtures that rapidly polymerize upon solvent evaporation is presented. This one-step synthetic procedure, previously used to prepare well behaved polypyrrole and polythiophene films…
Stable covalent C-C bonding of aromatic moieties has been achieved using Diels-Alder reactions on surface-annealed nanodiamond. Subsequent functionalisation leads to tunable surface properties and molecule-like behaviour.
Periodic-boundary-conditions density-functional theory and embedded cluster wave-function theory calculations performed on Ga-doped and Ce,Ga-codoped yttrium aluminum garnet (YAG) ${\text{Y}}_{3}{\text{Al}}_{5}{\text{O}}_{12}$, allowed for the determination of the atomistic structures of these materials when Ga substi…
Cl-doped n-type CdS NWs with single-crystal wurtzite structure and [Formula: see text] growth direction were synthesized by using CdCl(2) as the dopant via a thermal co-evaporation method. By controlling the Cl vapor pressure during the growth, the conductivity of the CdS:Cl NWs can be tuned in a wide range of five or…
We show that Ag-containing zeolites are highly effective against Staphylococcus aureus (SA) bacteria even at low Ag loadings and in the presence of high (10(9) CFU per mL) bacterial concentrations. At short contact times the bactericidal efficiency correlates strongly with Ag(+) release. At longer times data dispersio…