Materials Literature
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In order to fabricate thick PbZrxTi1−xO3 (PZT) films for microelectromechanical system applications, the authors introduce a concept of freestanding film without a substrate. PZT films with a thickness of up to 20μm were deposited on a very thin Pt layer without a substrate by the rf-magnetron sputtering method using…
X-ray photoelectron spectroscopy (XPS) revealed a lead-rich carbonatelike surface layer on polycrystalline lead zirconate titanate films grown by metal-organic chemical vapor deposition. In situ XPS studies indicated that lead originally present in the oxide film reacted with Pt during its deposition, forming a Ti∕Zr-…
Highly tunable films of dielectric PbxSr1−xTiO3 (with x=0.3 and 0.4) have been deposited on conductive LaNiO3 coated LaAlO3 substrates using a sol-gel technique. The processing condition was found to greatly influence the microstructure as well as the dielectric and electrical properties of the films. At room temperat…
Abstract Environmentally friendly, high‐quality layered K 4 Nb 6 O 17 crystals were easily grown by two different flux methods involving supersaturation, that is, flux evaporation and cooling of the solution. To fabricate them, potassium chloride (KCl) was chosen as the flux. Transparent and colorless plate‐like layer…
The structural, electronic, and optical properties of orthorhombic BiInO3 were investigated in the framework of the density functional theory. The calculated structural parameters are in agreement with the experimental data. The band structure, density of states, and Mulliken charge population are obtained, which indi…
Perovskite-type polycrystalline La1∕3Sr2∕3FeO3 particles with different sizes (80–2000nm) were prepared using a simple sol-gel technique. In samples of nanoparticles with a diameter of less than 300nm, weak ferromagnetism was observed at room temperature, which was attributed to the lattice distortion. The magnetic an…
The pending understanding of lattice dynamics in rhombohedral $(A7)$ arsenic has been resolved by the first-principles supercell method. An anomalous bonding with considerable stretching force constant is found between atoms spanning the alternately first and second nearest neighbors, which stabilizes the layered $A7$…
We investigate the behaviour of ellipsoidal nanoparticles adsorbed at liquid–liquid interfaces and under the influence of an external field. We propose a simple thermodynamic model that predicts the equilibrium orientation of the particles as a function of the field strength and the interfacial tensions. We show that…
The authors found that capacitance of polycrystalline spinel FeV2O4 exhibits a magnetic-field dependence with hysteresis and takes two values at zero field depending on the direction of a small magnetic field (∼1000G) applied prior to measurement. This behavior can be potentially used as a nonvolatile memory device in…
A chiral bivalve: Upon insertion of zinc ions, the 3,3′-bis(N-confused porphyrin) adopts a bent transoid structure with homochiral subunits that are capable of the supramolecular binding of alcohols. The introduction of a dianionic ligand of defined configuration results in the racemic mixture being converted into a p…
The authors used depth-resolved cathodoluminescence spectroscopy and current-voltage measurements to probe the temperature-dependent formation of native point defects and reaction layers at metal-ZnO interfaces and their effect on transport properties. These results identify characteristic defect emissions correspondi…
Experimental and numerical studies of μ-negative (MNG) materials such as multisplit ring resonators (MSRRs) and spiral resonators (SRs) are presented. The resonance frequency of the structures is determined by the transmission measurements and minimum electrical size of λ0∕17 for the MSRRs and of λ0∕82 for the SRs obs…
The large saturation magnetization in conventional dense moment ferromagnets offers a flexible means of manipulating the ordered state through demagnetizing shape anisotropy fields, but these dipolar fields, in turn, limit the integrability of magnetic elements in information storage devices. We show that in a (Ga,Mn)…
Structural damage enhanced near-infrared electroluminescence (EL) of a metal-oxide-semiconductor light emitting diode (MOSLED) made on SiOx film with buried nanocrystallite Si after CO2 laser rapid thermal annealing (RTA) at an optimized intensity of 6kW∕cm2 for 1ms is demonstrated. CO2 laser RTA induced oxygen-relate…
Highly asymmetric metal-containing block copolymers are capable of forming nanotubes in solutions containing a nonpolar solvent. In this study, the time-dependent formation of these nanotubes is investigated and reveals how the aggregate nanostructures develop (see figure for an example at an early stage). These nanot…
OBJECTIVE: The goal of this study was to determine whether iodinated liposomes are a suitable tracer for mice microvessel and liver imaging by preclinical computed tomography (CT). MATERIALS AND METHODS: Iodinated liposomes were evaluated for vessel and liver imaging. A first group of nude mice was imaged by micro-CT…
Showing more metal: Monohydroxy alcohol homologues with a different ratio of carbon to oxygen atoms (RCO) were employed as carbon feedstocks to prepare single-walled carbon nanotube (SWNTs). The relative amount of metallic SWNTs can be directly enriched by increasing the RCO. During growth, selective etching effects o…
A low-loss optical erbium activated silica-hafnia glass-ceramic planar waveguide was fabricated using a bottom-up approach. Hafnia nanoparticles were first prepared by colloidal route and then mixed in a silica-hafnia:Er3+ sol. The resulting sol was deposited on SiO2 substrate. Analysis of the photoluminescence has de…
In exchange-spring magnets with temperature-induced interfacial intermixing, differences in the extent of diffusion of constituent elements typically lead to local compositional changes. The authors demonstrate that adding an artificially created intermixed layer in Sm–Co∕Fe exchange-spring permanent magnets enhances…
The structural and vibrational properties of ${\mathrm{Lu}}_{1.8}{\mathrm{Y}}_{0.2}\mathrm{Si}{\mathrm{O}}_{5}$ (LYSO) single crystals were investigated by means of Raman spectroscopy and x-ray diffraction measurements. Unit cell parameters and bond lengths were determined by Rietveld refinement of the collected x-ray…