Materials Literature
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We present thermal conductivity measurements performed in three short-period ${(\text{GaAs})}_{9}{(\text{AlAs})}_{5}$ superlattices. The samples were grown at different temperatures, leading to different small scale roughness and broadening of the interfaces. The cross-plane conductivity is measured with a differentia…
Pumping n-type GaAs and InSb with ultrafast THz pulses having intensities higher than 150 MW/cm2 shows strong free carrier absorption saturation at temperatures of 300 K and 200 K respectively. If the energy imparted to the carriers exceeds the bandgap, impact ionization processes can occur. The dynamics of carrier co…
This article reviews the basic computational techniques for carrying out multi-scale simulations using statistical methods, with the focus on simulations of epitaxial growth. First, the statistical-physics background behind Monte Carlo simulations is briefly described. The kinetic Monte Carlo (kMC) method is introduce…
In this work the framework type was assigned to 1370 zeolite crystals included in the Inorganic Crystal Structure Database.
Recently superconductivity at the interface between the insulators LaAlO3 and SrTiO3 has been tuned with the electric field effect to an unprecedented range of transition temperatures. Here we perform a detailed finite size scaling analysis to explore the compatibility of the phase transition line with Berezinskii-Kos…
We report the ferroelectricity and ferromagnetism coexistence in the Fe-doped ${\text{BaTiO}}_{3}$. Our first-principles calculation based on the density-functional theory predicted a magnetic moment of $3.05{\ensuremath{\mu}}_{B}$ per Fe atom when Fe substitutes Ti in ${\text{BaTiO}}_{3}$, and a ferromagnetic couplin…
Superparamagnetic iron oxide nanoparticles with proper surface coatings are increasingly being evaluated for clinical applications such as hyperthermia, drug delivery, magnetic resonance imaging, transfection, and cell/protein separation. To enhance the applicability of magnetic nanoparticles, two main problems must b…
The formation of polyelectrolyte complex nanoparticles (PCN) was investigated at different charge mixing ratios for the chitosan-heparin (chi-hep) and chitosan-hyaluronan (chi-ha) polycation-polyanion pairs. The range of 0.08-19.2 for charge mixing ratio (n(+)/n(-)) was examined. The one-shot addition of polycation an…
Metal oxide semiconductor field-effect transistors, formed using silicon dioxide and silicon, have undergone four decades of staggering technological advancement. With fundamental limits to this technology close at hand, alternatives to silicon dioxide are being pursued to enable new functionality and device architect…
Strengthening materials traditionally involves the controlled creation of internal defects and boundaries so as to obstruct dislocation motion. Such strategies invariably compromise ductility, the ability of the material to deform, stretch, or change shape permanently without breaking. Here, we outline an approach to…
Abstract The photoluminescence (PL) emission band corresponding to 4 F 3/2 → 4 I 15/2 transition has been revealed using a double lock‐in technique and quadrature frequency resolved spectroscopy (QFRS) at room temperature in Nd 3+ in a GaLaS glass. The band is centred around 1840 nm and has a lifetime ∼77 μs, which se…
Electrical resistance, magnetization, and magnetoresistance have been measured as functions of temperature from 50 to 300 K on three ferromagnetic glass ceramics containing different magnetite crystals by preparing conditions and crystal morphology. Magnetite crystals form a percolating network for electrons with weak…
Waterproofing of corrugated packaging with wax or polyethylene hinders recyclability and so is incompatible with current socioeconomic goals of sustainability. Therefore, alternative coating technologies are sought. This study describes our feasibility study of electrohydrodynamic spraying (EHS) towards waterproofing…
Die vollständige Danksagung dieser Zuschrift lautet wie folgt: “This work was supported by Precursory Research for Embryonic Science and Technology (PRESTO), the Japan Science and Technology Agency (JST), and Creative Research Initiatives (Center for Time-Resolved Diffraction) of MOST/KOSEF (H.I.). D.J. thanks the JSP…
Abstract The results of a systematic study of photoluminescence (PL) properties of un‐doped sapphire crystals grown using different starting materials on various crystal growth methods (CZ, EFG, HDSM, Kyropoulus, HEM) are presented. Narrow line of emission has been attributed to radiation transition in Cr 3+ ions (R‐l…
We have synthesized and studied a series of composite silver-polymer photonic metamaterials with composition-tunable electric response. The dielectric constants of metamaterials, derived from the transmittance and reflectance spectra, were compared against several effective medium models. The demonstrated value of the…
We have investigated the interaction between Pd and Ce in a (0.47 wt %) CeOx–Pd(1 wt %)/α-Al2O3 catalyst that is used in the reforming reaction of CH4 with CO2. The freshly reduced catalyst was characterized by various electron microscopy techniques, such as elemental mapping, Z-contrast imaging, and electron energy-l…
In-ovo Feeding (IOF), injecting nutrients into the amnion of the developing embryo may enhance post-hatch growth by enhancing intestinal expression and function prior to hatch. This hypothesis was evaluated with IOF solutions of Arginine (ARG), HMB and Egg White Protein (EW) in turkeys. Four treatments were arranged a…
Although corrosion of airframes is a major issue for both commercial and military air fleets, little work has been carried out on how the pollutants that promote corrosion on airframes are deposited (particularly in flight). In this study, a model has been developed that defines the efficiency of aerosol deposition on…
Enhanced electron field emission (EFE) behavior was observed in ultrananocrystalline diamond (UNCD) and microcrystalline diamond (MCD) films upon irradiation with 100 MeV Ag9+-ions in a fluence of 5×1011 ions/cm2. Transmission electron microscopy indicated that while the overall crystallinity of these films remained e…