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。
Polycrystalline alloys of PbSe with rare-earth elements (Ce, Pr, Nd, Eu, Gd, and Yb) have been prepared and their magnetic susceptibility (from 4 to 120 K), galvanomagnetic and thermomagnetic transport (from 80 to 380 K) properties have been measured. Most samples are paramagnetic, and the concentration of rare-earth…
This article reports on the formation and electronic characteristics of conducting carbon nanowires produced by swift heavy ion irradiation of a fullerene thin film. This study shows that it is possible to create arrays of carbon nanowires, which are perfectly parallel to each other and perpendicular to the substrate.…
Ce 1 − x Co x O 2 − δ films with the stoichiometry of x=0,0.03,0.06,0.1,0.125 were fabricated on Si(111) substrates using O2 assisted pulse laser deposition method. While pure CeO2 film is weak paramagnetism, integration of low Co content of 3at.% introduces ferromagnetim with a giant saturation moment (Ms) of 5μB∕Co…
In recent years there have been vast efforts to establish organic electronic devices. A key property of such devices is the possibility to fabricate them on flexible substrates. As the layers are mechanically stressed during bending, the knowledge of mechanical properties of the materials used will become very importa…
The influence of ZnO seed crystals and postgrowth annealing on low-temperature aqueous chemically grown ZnO nanorods is analyzed. At the seed crystal/nanorod interface a high density of structural defects leads to emission at 3.332 eV, attributed to excitons bound to structural defects. This peak is absent for seed cr…
The spontaneous formation of self-assembled honeycomb-patterned structures from a single-walled carbon nanotube (SWNT) solution is shown. Simple solution casting of a SWNT–lipid conjugate (complex 1) on solid substrates is used. Microporous films (see figure) are cast from solutions of the complex in various solvents.
The aromatic Schiff base N -salicylideneaniline (SA) represents the aristotype of a whole family of chromic derivatives. SA forms two photochromic polymorphs, α 1 and α 2, both of which feature non-coplanar phenyl rings. Since many details of its reversible photoreactivity are still unexplained, we report the structur…
Electrical conductive textured LaNiO3/SrTiO3 (100) thin films were successfully produced by the polymeric precursor method. A comparison between features of these films of LaNiO3 (LNO) when heat treated in a conventional furnace (CF) and in a domestic microwave (MW) oven is presented. The x-ray diffraction data indica…
Effects of the lead zinc niobate (PZN) addition and postannealing temperature on the electrical properties of the lead zirconate titanate (PZT) films were observed to improve electrical properties of the PZT film. The PZN content was varied from 0% to 40%, and the postannealing temperature was varied from 500to900°C.…
This article studies the size effect on the elastic behavior of solid and hollow polymer nanofibers (e.g., electrospun nanofibers) subjected to uniaxial tension. A one-dimensional nonlinear elastic tension model is proposed that takes into account the coupling effect of fiber elastic deformation and surface tension. T…
Double-walled carbon nanotubes (DWCNTs) are modeled based on Donnell’s shell theory, and flow-induced instability that is induced when pressure-driven fluid goes through the inner tube at a steady flow velocity is studied. The van der Waals (vdW) interaction between the inner and outer walls is taken into account in t…
Abstract The use of cryopreserved arteries for vascular tissue engineering provides a promising way for vessel replacement. Unfortunately cryopreservation induces structural changes that strongly modify the mechanical properties and alter the thrombogenicity of the vessel after implantation. We present here a new proc…
The degradation of water soluble polymers, namely, poly(ethylene oxide) (PEO), poly(acrylic acid) (PAA), and poly(vinyl pyrrolidone) (PVP), by ultraviolet (UV) and ultrasound (US) exposure in the presence of combustion solution synthesized TiO 2 (CSN TiO 2 ) was investigated. The time evolution of the molecular weight…
Abstract A cationic water‐soluble tetrahedral molecule bearing four phenylene‐bis(fluorene) optical units, namely tetrakis[4‐(2‐(9,9,9′,9′‐tetrakis( N , N , N ‐trimethylammoniumhexyl)‐7,2′‐bifluorenyl))‐phenyl]methane hexadecanebromide, was designed and synthesized. Fluorescence resonance energy transfer (FRET) experi…
We have explored the adsorption kinetics of argon and methane on chemically opened and on as-produced carbon nanotubes. We monitored the evolution of the adsorbate pressure after each gas dose was added to the cell during the performance of adsorption isotherms. We found significant differences between the equilibrati…
We study Josephson effect in graphene superconductor/barrier/superconductor junctions with short and wide barriers of thickness $d$ and width $L$, which can be created by applying a gate voltage ${V}_{0}$ across the barrier region. We show that Josephson current in such graphene junctions, in complete contrast to thei…
Abstract High‐density polyethylene (HDPE)/(ethylene‐vinyl alcohol) (EVOH) copolymer alloys were prepared through reactive extrusion method with high‐density polyethylene‐ graft ‐maleic anhydride (HDPE‐ g ‐MAH) as a compatibilizer to improve the compatibility of the blending system. The results of the morphologies and…
Ferroelectric Cr-doped BiFeO3 (BFCr) thin films having a rhombohedrally distorted simple perovskite structure were fabricated on the p-type Si (100) substrate by the chemical solution deposition technique. The microstructures and the surface morphologies of BFCr thin films on the p-type Si (100) annealed at 550 °C for…
Bi 2 Ti 2 O 7 thin films were grown by radio-frequency magnetron sputtering on bare and Pt-coated sapphire substrates at low substrate temperatures (∼200 °C). Postdeposition anneals were carried out at different temperatures to crystallize the films. Nearly phase-pure Bi2Ti2O7 thin films with the cubic pyrochlore stru…
This article presents the results of combined experimental and theoretical studies of elastic and thermal properties of Zr2Al3C4 carbide. The full set of second order elastic constants, bulk modulus, shear modulus, and Young’s modulus of Zr2Al3C4 were calculated and compared with those of Zr3Al3C5 and ZrC. The experim…