Materials Literature
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The atomic arrangement in a solid contains a great amount of information, and observation of its structure is essential for understanding the electronic and magnetic properties of transition metal oxides at a microscopic level. Increasing interest in the surfaces and interfaces of oxide systems, which is partly driven…
Abstract Polar c ‐axis oriented Zn 0.75 Cd 0.25 O/ZnO multiple quantum wells (MQWs), grown by pulsed‐laser deposition (PLD), emitting in the visible spectral range are reported. By applying a low growth temperature of ≈300 °C a large Cd content of 0.25 and abrupt interfaces could be achieved using PLD. The emission en…
A number of new quaternary iridium based hydrides and deuterides AAeIrH/D(6) (where A = Na and K; Ae = Ca, Ba, Sr, and Eu) have been synthesized by direct combination of the alkali, alkaline earth or europium binary hydrides/deuterides and iridium powder. The crystal structures were determined by Guinier-Hägg X-ray an…
Absolute spin-wave band gaps can be substantially opened and tuned by rotating noncircular rods in two-dimensional magnonic crystals. Spin-wave band structures of two-dimensional magnonic crystals composed of Fe (EuO) square rods squarely arranged in a EuO (Fe) matrix are numerically calculated using the plane-wave me…
Several Yb 3+ /Tm 3+ /Ho 3+ co-doped transparent TeO 2 –ZnO–Na 2 O–Yb 2 O 3 –Ho 2 O 3 –Tm 2 O 3 glasses were prepared and luminescence properties were characterized. Simultaneous red, green and blue (RGB) emission were obtained after excitation at 970 nm. Colour emission was tuned from multicolour to white light with…
Athermal solutions (from dilute to concentrated) of semiflexible macromolecules confined in a film of thickness D between two hard walls are studied by means of grand-canonical lattice Monte Carlo simulation using the bond fluctuation model. This system exhibits two phase transitions as a function of the thickness of…
In the course of structurally characterizing previously reported complexes based on the 1,2-bis(dimethylphosphino)ethane)) (dmpe) ligand ([(dmpe)(2)UCl(4)] (1) and [(dmpe)(2)UMe(4)] (2)), we find that adjusting the U/dmpe ratio leads to an unprecedented species. Whereas the use of two or three equivalents of dmpe rela…
In this study the environmental toxicity of procured silver (Ag) nanoparticles (NPs) and its equivalent Ag ion concentrations were determined using seed germination tests with Lycopersicum esculentum and Zea mays. Our results showed that AgNP exhibited more toxicity than its equivalent ion concentration by inhibiting…
We have discovered that metallic gold is a highly effective vehicle for the low-temperature vapor-phase carbonylation of methanol by insertion of CO into the O-H bond to form methoxycarbonyl. This reaction contrasts sharply to the carbonylation pathway well known for homogeneously catalyzed carbonylation reactions, su…
Resonance Raman spectroscopy (RRS) often suffers from the large fluorescence background which obscures the much weaker Raman scattering. To address this fundamental problem, a novel Raman substrate has been fabricated by adsorption of Au 0.7 Ag 0.3 alloy nanoparticles (NPs) on a graphene oxide (GO) coated SiO 2 surfac…
We report on our study on the influence of the growth conditions on the europium/oxygen stoichiometry, morphology, magnetic properties, and electrical conductivity of EuO thin films. SQUID magnetometry and x-ray photoelectron spectroscopy were utilized as complementary techniques to determine the oxygen content of EuO…
Measuring the surface energy of highly hygroscopic materials has remained a thorny problem for many years, mainly because obtaining an anhydrous surface state and maintaining this condition during the surface energy assessment has been considered an impractical task. In this work, we developed synthetic and calorimetr…
The tunable structure of silica–latex nanocomposites made of silica nanoparticles (radius ≈ 80 Å) and a copolymer of methyl methacrylate and butyl acrylate–latex beads (radius ≈ 210 Å) has been studied by small-angle neutron scattering and transmission electron microscopy. An aggregation diagram as a function of the c…
Infrared spectra of three new thorium oxide species have been obtained in argon and neon matrixes. All of the products are experimentally characterized using isotopic oxygen samples with the aid of electronic structure calculations. Ground state thorium atoms react with O(2) to form the ThO(2) molecules, which can dim…
The use of plasmonic nanostructures for the removal of unwanted long-lived states is investigated. We show that the total decay rate of such a state can be increased by up to 4 orders of magnitude, as compared to its intrinsic radiative decay rate, while leaving other neighboring optical transitions unaffected. For th…
Abstract A number of U‐shaped K 2 NiF 4 ‐type oxide hollow fiber membranes based on (Pr 0.9 La 0.1 ) 2 (Ni 0.74 Cu 0.21 Ga 0.05 )O 4+δ (PLNCG) were successfully prepared by a phase inversion spinning process. The PLNCG hollow fiber membranes were then used to investigate the effect of CO 2 concentration in both the sw…
The size and shape of CdSe nanorods, CdSe tetrapods, and CdS nanowires were tailored by chemical and photochemical etchings in chloromethane solvents. Nanocrystals were synthesized by colloidal growth, and their sizes and shapes were visualized by transmission electron microscopy before and after etching. Crystal stru…
Nanoparticles adsorbed onto the surface of a drop can fully encapsulate the liquid, creating a robust and durable soft solid with superhydrophobic characteristics referred to as a liquid marble. Artificially created liquid marbles have been studied for about a decade but are already utilized in some hair and skin care…
The efficient and controllable synthesis, the detailed characterization, and the chemical postfunctionalization of polycarboxylated single-walled carbon nanotubes SWCNT(COOH)(n) are reported. This innovative covalent sidewall functionalization method is characterized by (a) the preservation of the integrity of the ent…
An exhaustive temperature dependent structural and dielectric study of the tetragonal tungsten bronze-type Sr(2)NaNb(5)O(15) (SNN) compound has been performed in the 300-100 K temperature range, by combining X-ray, neutron diffraction, and transmission electron microscopy with dielectric measurements, in order to clar…