Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
The properties of an Ir (5nm)∕TaN (5nm) stacked layer as a copper diffusion barrier on Si have been investigated. Ir∕TaN bilayer barriers were prepared at room temperature by magnetron sputtering followed by in situ Cu deposition for diffusion tests. Thermal annealing of the barrier stacks was carried out in vacuum at…
We fabricated epitaxial Co-doped BaTiO3 thin films (4–80nm thick) on Nb-doped SrTiO3 substrates. Our results indicate that Co ions exist in the form of Co3+ and that no Co metal clusters appear. All of the Co-doped BaTiO3 thin films show ferromagnetic behavior and the saturated magnetization increases as the film thic…
Cobalt ferrite (CoFe2O4) possesses excellent chemical stability, good mechanical hardness, and a large positive first order crystalline anisotropy constant, making it a promising candidate for magneto-optical recording media. In addition to precise control of the composition and structure of CoFe2O4, its practical app…
In the frame of the Hartree--Fock approximation, the dispersion of magnetoplasmons in graphene is derived for all types of transitions for filling factors $\ensuremath{\nu}\ensuremath{\leqslant}6$. The optical conductivity components of the magnetoplasmon curves are calculated. It is shown that the electron-electron i…
We report white light generation by hybridizing green-red emitting (CdSe)ZnS∕CdSe (core)shell/shell quantum-dot-quantum-well heteronanocrystals on blue InGaN∕GaN light emitting diodes with the photometric properties of tristimulus coordinates (x,y)=(0.36,0.30), luminous efficacy of optical radiation LE=278lm∕W, correl…
We report the magnetic and transport properties of [(SrMnO3)n∕(LaMnO3)2n]m superlattices grown by molecular-beam epitaxy on (100) SrTiO3 with periodicities n=1, 2, 3, 4, 5, 6, 8, and 16. Although the superlattice constituents, LaMnO3 and SrMnO3, are both antiferromagnetic insulators, for small n (n⩽2) the superlattice…
ZnO-based light emitting diodes were fabricated on c-plane sapphire using ZnO:P∕Zn0.9Mg0.1O∕ZnO∕Zn0.9Mg0.1O∕ZnO:Ga p-i-n heterostructures. The p-i-n heterojunction diodes are rectifying and show light emission under forward bias. The electroluminescence spectra shows deep level emission at low bias, but near band edge…
We report direct microscopic measurements that confirm the magnetic stripe-domain patterns can be reversibly changed under an electric field due to the converse magnetoelectric effect in a bilayer thin film ferromagnetic-Ni/ferroelectric-lead zirconate titanate (100nm∕1.28μm) heterostructure. Electric field-induced cu…
Cu doped CdS nanophosphors were fabricated through Langmuir-Blodgett route for the first time. Precursors mixed Langmuir-Blodgett multilayers of cadmium arachidate-copper arachidate were used to grow doped sulfide nanoparticles within the organic matrix through postdeposition treatment with H(2)S gas. Changes in compo…
Solvent-free trivalent rare-earth metal borohydrides $R{(\mathrm{B}{\mathrm{H}}_{4})}_{3}$ ($R=\mathrm{Y}$, Dy, and Gd) were synthesized from $R{\mathrm{Cl}}_{3}$ and $\mathrm{Li}\mathrm{B}{\mathrm{H}}_{4}$ through solid-state metathesis reactions and characterized by powder x-ray or neutron diffraction measurement an…
Diamond metal-oxide-semiconductor field-effect transistors (FETs) have been fabricated on IIa-type large-grain diamond substrates with a (110) preferential surface. The drain current and cutoff frequency are −790mA∕mm and 45GHz, respectively, which are higher than those of single-crystal diamond FETs fabricated on (00…
Real-time height measurements demonstrate that growth of millimeter-high carbon nanotube (CNT) forests terminates abruptly after first exhibiting a steady decay in growth rate. Termination is accompanied by a distinct loss of alignment among the CNTs, which is quantified by small-angle x-ray scattering. Previously sug…
First-principles calculations based on the projector augmented-wave (PAW) technique have been applied to the prediction of materials properties of $\ensuremath{\alpha}$-uranium and its (001) surface. The results of the PAW calculations are shown to be comparable in accuracy to the full-potential calculations reported…
We report the magnetic-field amplitude and field-angle dependence of the superconducting onset temperature ${T}_{c}^{\mathrm{onset}}$ of the organic superconductor $(\mathrm{TMTSF}{)}_{2}{\mathrm{ClO}}_{4}$ in magnetic fields $\mathbit{H}$ accurately aligned to the conductive $a{b}^{\ensuremath{'}}$ plane. We revealed…
Abstract The possibility of producing wood‐plastic panels using a melt blend/hot press method was studied in this research. The studied panels were compared with conventional medium density fiberboard (MDF) and particleboard (PB) panels. Wood‐plastic panels were made from high density polyethylene (as resin) and MDF w…
Infectious diseases caused by the human immunodeficiency virus (HIV) remain the leading killers of human beings worldwide, and function to destabilize societies in Africa, Asia, and the Middle East. Driven by the need to detect the presence of HIV viral sequence, here we demonstrate that the second-order nonlinear opt…
Heterojunction NiO∕ZnO light emitting diodes have been fabricated using low temperature solution-based growth methods. While negligible light emission has been obtained for the as-grown NiO film, devices with annealed NiO film exhibit room-temperature electroluminescence (EL), which was attributed to the detrimental e…
In the past decade, room temperature ferromagnetism was often observed in transition metal doped semiconductors, which were claimed as diluted magnetic semiconductors (DMS). Nowadays intensive activities are devoted to clarify wether the observed ferromagnetism stems from carrier mediated magnetic impurities, ferromag…
A systematic investigation by dielectric spectroscopy of 18 different water-rich mixtures with very different hydrophilic substances shows universal features for the water dynamics. The temperature dependence of the relaxation times exhibits a crossover from non-Arrhenius to Arrhenius behavior at the T(g) range of the…
We report on an innovative route to increase the upconversion (UC) green radiation by two orders of magnitude in Y2O3:Er3+ nanocrystals through tailoring Er3+ ions’ local environment with Li+ ions under diode laser excitation of 970nm. Theoretical investigations based on the steady-state rate equations indicate that s…