Materials Literature
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Simultaneous measurements of the charge Q and the capacitance C were performed for an MFS capacitor with Au-(vinylidene fluoride-trifluoroethylene copolymer)-(n-Si) structure using a double-frequency voltage consisting of a low-frequency high voltage and a high-frequency sinusoidal low voltage. The use of a triangular…
The authors have investigated resonant tunneling in nonuniform magnetically modulated graphene-based double-barrier structures, which can be realized experimentally by depositing successive ferromagnetic stripes on graphene monolayer. The effects of Klein tunneling, resonant tunneling, and magnetically induced wave ve…
We synthesized the ZnS:Mn2+ nanoparticles passivated by biocompatible layer, namely, biotin by chemical precipitation route and studied their temporal evolution for size, structure, optical, and photoluminescence stability. To monitor the structural and optoelectronic properties of the nanoparticles with time, we have…
In this paper we reported the thermoelectric (TE) properties in nanostructured homologous series alloys GamSbnTe1.5(m+n) over the temperature range of 318–482 K and observed the maximum TE figure of merit (ZT) value of 0.98 for the alloy with m:n=1:10 at 482 K, which is approximately 0.24 higher than that of undoped S…
We have synthesized by chemical vapor deposition (CVD) single-, double-, and multiwalled carbon nanotubes without magnetic impurities. In particular, we have applied a rhenium-based CVD technique yielding nonmagnetic carbon nanotubes with diamagnetic Re particles. In addition, carbon nanotubes prepared with iron as ca…
The stress influence of the structural and ferroelectric properties of polycrystalline BiFeO3 (BFO) thin films has been investigated using a membrane substrate for relaxing stress. Reciprocal space mapping (RSM) measurement has been performed to confirm the stress dependence of the crystal structure of polycrystalline…
About 3.0 μm thick SmCo-based films with additives of Fe, Cu, and Zr were deposited on Si substrates. Based on a developed semiempirical theoretical model, the dependence of the film composition on the sputtering parameters was discussed. The experimental results show that the Sm concentration increases with decreasin…
In this paper, we present a theoretical study of magnetic properties of MPo (M=Ti, V, Cr, Mn, Fe) compounds in the zinc-blend structure using full-potential linear augmented plane wave method. Our calculation indicates that MnPo and FePo are antiferromagnetic, whereas TiPo, VPo, and CrPo are magnetic. The ferromagneti…
A Pseudomonas sp. strain S3, which can utilise a halogenated compound of D., L-2CP as sole carbon and energy source, catalyses the hydrolytic dehalogenation of both D-and L-isomers of 2-chloropropionic acid. Two kinds of dehalogenase enzymes were isolated from cells of Pseudomonas sp. strain S3. A thermostable L-speci…
The changes in polarization and coercive voltage of lead zirconate titanate (PZT) thin film of 130 nm in thickness were measured under hydrostatic pressure up to 1.5 GPa. By converting the isotropic loading to an equivalent out-of-plane uniaxial compressive loading, it was found that these results were consistent with…
Abstract Micro‐arc oxidation (MAO) method was used for the surface modification of an Mg‐5wt.%Li alloy. Ceramic coatings were in‐situ fabricated on the Mg‐Li alloy. The morphology feature, phase composition, and corrosion‐resistance of the formed ceramic coatings were studied by SEM, XRD, and electrochemical methods,…
In order to build printable inorganic electronic devices, semiconducting suspensions are needed, which can be processed at low temperatures using low-cost manufacturing techniques. Stabilized suspensions made of zinc oxide (ZnO) nanoparticles were used to fabricate field-effect transistors by spin coating. The perform…
Wavelength-matched vibrational excitations of ethylene (C2H4) molecules using a tunable carbon dioxide (CO2) laser were employed to significantly enhance the chemical vapor deposition (CVD) of diamond in open air using a precursor gas mixture of C2H4, acetylene (C2H2), and oxygen (O2). The CH2-wag vibration mode (ν7)…
A dc-induced voltage oscillation was observed at room temperature in (Ni36Nb24Zr40)90.1H9.9 glassy alloy ribbons of about 1 mm width and 30 μm thickness and an electrode distance of 20 mm. The I-V characteristic provided evidence of the Coulomb staircase at ∼300 K, suggesting the existence of macroscopic proton dot tu…
Epitaxial Pb(Zr,Ti)O3 (PZT) thick films of 2.0–3.0 μm thickness were grown at 600 °C on (100)cSrRuO3∥(100)SrTiO3 and (100)cSrRuO3∥(100)LaNiO3∥(100)CaF2 substrates by pulsed-metal organic chemical vapor deposition. All films showed (100) and/or (001) orientations with tetragonal symmetry. It was found that there is an…
We report on the growth of highly epitaxial La2/3Sr1/3MnO3 thin films on SrTiO3 (001) oriented substrates by rf magnetron sputtering. It is shown that structural strain caused by lattice mismatch between film and substrate and kinetics growing instabilities may offer unique opportunities to control the film morphologi…
Calcium difluoride crystals cleaved along the (111) direction are etched with the dislocation site selective etchants HNO3, HCl, H2SO4, and H3PO4 and their surfaces are inspected ex situ with scanning force microscopy (AFM). Force microscopy yields characteristic features of the etch pits at the nanometer scale such a…
Metal-ferroelectric-insulator-semiconductor thin-film capacitors with Pb(Zr0.6,Ti0.4)O3 (PZT) ferroelectric layer and high-k lanthanum oxide (La2O3) insulator layer were fabricated. The outdiffusion of atoms between La2O3 and silicon was examined by the secondary-ion-mass spectroscopy. The size of memory window as a f…
In this paper, the evolution of lead zirconate titanate (PZT) capacitor leakage current mechanism as a function of dielectric thickness has been investigated. It has been pointed out that PZT leakage current switches from Schottky to Poole–Frenkel conduction mechanisms as PZT thickness decreases. The leakage current e…
The growth of multiwalled carbon nanotubes and carbon nanofibers by catalytic chemical vapor deposition at lower temperatures is found to be aided by a separate catalyst pretreatment step in which the catalyst thin film is restructured into a series of nanoparticles with a more active surface. The restructuring is par…