Materials Literature
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The effects of pressure up to $\ensuremath{\sim}20\text{ }\text{kbar}$ on the structural phase transition of ${\text{SrFe}}_{2}{\text{As}}_{2}$ and lightly Sn-doped ${\text{BaFe}}_{2}{\text{As}}_{2}$ as well as on the superconducting transition temperature and upper critical field of $({\text{Ba}}_{0.55}{\text{K}}_{0.…
We report electrical properties of Ta-doped SnO2 (Sn1−xTaxO2) films epitaxially grown on (110) surfaces of rutile TiO2 single crystalline substrates by a pulsed laser deposition method. Due to the large in-plane lattice mismatches (3.0% along [1¯10] and 7.7% along [001]), the films had almost relaxed crystalline struc…
Abstract Conducting polymer composites were prepared by hot compression molding of high‐density polyethylene (HDPE) prelocalized with graphite (Gr). The variation of room temperature electrical conductivity, dielectric constant, and Shore‐D hardness as a function of graphite content were studied below and above percol…
Measurements of the in-plane magnetic-field penetration depth ${\ensuremath{\lambda}}_{\text{ab}}$ in Fe-based superconductors with the nominal composition ${\text{SmFeAsO}}_{0.85}$ $({T}_{c}\ensuremath{\simeq}52\text{ }\text{K})$ and ${\text{NdFeAsO}}_{0.85}$ $({T}_{c}\ensuremath{\simeq}51\text{ }\text{K})$ were carr…
By reducing film thickness to a few nanometers, the narrow-band-gap CuS turns highly transparent. Surface modification by a self-assembled monolayer is the key factor to obtain a thin, dense, and continuous film. The film growth mechanism is identified as “layer-by-layer growth followed by islanding.” After annealing,…
Sr 3 ( Al 2 O 5 ) Cl 2 phosphor doped with Eu2+ was prepared by a soli-state reaction. This phosphor emits a broad orange-yellow luminescence with a peak wavelength of 620nm and a full width at half maximum of about 175nm under near-ultraviolet (NUV) excitation at ∼400nm. Yellow light-emitting diodes (LEDs) for genera…
Magnesium is light, biocompatible and has similar mechanical properties to natural bone, so it has the potential to be used as a biodegradable material for orthopedic applications. However, pure magnesium severely corrodes in a physiological environment, which may result in fracture prior to substantial tissue healing…
To see if ferromagnetism can occur in C-doped anatase TiO2, we performed first-principles calculations for a number of C-doped structures in which C atoms substitute O atoms. Our study shows that each C has spin-polarized 2p states in the band gap generating a magnetic moment of 2.0μB. The magnetic coupling between do…
The oxidation state of Fe in hydrous ultrapotassic (phono-tephritic) melts coexisting with mixed H 2 O-CO 2 fluids was studied experimentally at 1200 and 1250 °C and pressures from 50 to 500 MPa. The oxygen fugacity (f O₂ ) varied from NNO-2.9 to NNO+2.6 in log f O₂ , relative to the Ni-NiO oxygen buffer (NNO), as imp…
Abstract Miniaturized solid oxide fuel cells are fabricated on a photostructurable glass ceramic substrate (Foturan) by thin film and micromachining techniques. The anode is a sputtered platinum film and the cathode is made of a spray pyrolysis (SP)‐deposited lanthanum strontium cobalt iron oxide (LSCF), a sputtered p…
In this paper we numerically conduct micromagnetic modelling with an expended micromagnetic model that includes the spin torque term and an impedance model to investigate methods to replace external field sources with internal ones and to investigate its tuneability on nanopillar geometries. We present results for thr…
Strained coherent heteroepitaxy of III-V semiconductor films such as In$_x$Ga$_{1-x}$As/GaAs has potential for electronic and optoelectronic applications such as high density logic, quantum computing architectures, laser diodes, and other optoelectronic devices. Crystal symmetry can have a large effect on the morpholo…
Recent findings on intriguing physical properties of new A-site-ordered perovskite structure oxides are reviewed. High-pressure and high-temperature conditions stabilize the square-coordinated Jahn-Teller Cu (2+) ions in the original 12-fold-coordinated positions of the perovskite structure. The special-ordered arrang…
ABSTRACT The effects of chitosan coating on delaying ripening and reducing decay of mango fruits (Mangifera indica L. cv. Tainong) were investigated in this article. The fruits were treated with 0.5, 1.0 or 2.0% chitosan solution, respectively, and were stored at 15C, 85–90% relative humidity. Results showed that the…
Metal selenites and tellurites are a class of very important compounds. In this paper, the structures and properties of metal selenites or tellurites combining with transition-metal (TM) ions with the d (0) electronic configuration or tetrahedral MO 4 building blocks of post-transition main-group elements were reviewe…
BACKGROUND: Computational models of protein structure are usually inaccurate and exhibit significant deviations from the true structure. The utility of models depends on the degree of these deviations. A number of predictive methods have been developed to discriminate between the globally incorrect and approximately c…
Abstract In this paper, we report a novel synthesis and selective bioseparation of the composite of Fe 3 O 4 magnetic nanocrystals and highly ordered MCM‐41 type periodic mesoporous silica nanospheres. Monodisperse superparamagnetic Fe 3 O 4 nanocrystals were synthesized by thermal decomposition of iron stearate in di…
We study the effects of growth temperature, Ga:As ratio, and postgrowth annealing procedure on the Curie temperature TC of (Ga,Mn)As layers grown by molecular beam epitaxy. We achieve the highest TC values for growth temperatures very close to the two-dimensional–three-dimensional phase boundary. The increase in TC, d…
Abstract Die Nanofabrikation wird sehr wahrscheinlich Teil vieler Technologien im 21. Jahrhundert sein. Dabei bietet die chemische Synthese einen effizienten Ansatz zur Herstellung von molekularen Strukturen, die sich zu funktionellen Nanoarchitekturen organisieren. Ein starkes Interesse an selbstorganisierenden niede…
We study the charge state of the diffusing O$_2$ molecule during silicon oxidation through hybrid functional calculations. We calculate charge transition levels of O$_2$ in bulk SiO$_2$ and use theoretical band offsets to align these levels with respect to the Si band edges. To overcome the band-gap problem of semiloc…