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。
We present results of temperature dependent measurements of dynamics of micellar nanoparticle - polymer composites of fixed volume fraction and variable polymer chain grafting density. For nanoparticles with lower grafting density we observe dynamically arrested state at low temperatures corresponding to an attractive…
We study the long-time dynamics of hexagonal directional-solidification patterns in bulk samples of a transparent eutectic alloy using an optical method which permits real-time observation of the growth front. A slow dilatation of the patterns due to a slight curvature of the isotherms drives the system into a permane…
Understanding the plasticity and strength of crystalline materials in terms of the dynamics of microscopic defects has been a goal of materials research in the last 70 years. The size-dependent yield stress observed in recent experiments of submicrometer metallic pillars provides a unique opportunity to test our theor…
High-resolution x-ray photoemission spectroscopy, infrared reflectivity and Hall effect measurements, combined with surface space-charge calculations, are used to show that electron accumulation occurs at the surface of undoped single-crystalline In2O3. From a combination of measurements performed on undoped and heavi…
Graphene samples prepared by the exfoliation of graphitic oxide and conversion of nanodiamond exhibit good hydrogen uptake at 1 atm, 77 K, the uptake going up to 1.7 wt %. The hydrogen uptake varies linearly with the surface area, and the extrapolated value of hydrogen uptake by single-layer graphene works out to be j…
Structures of set of serine-threonine and tyrosine kinases were investigated by the recently developed bioinformatics tool Local Spatial Patterns (LSP) alignment. We report a set of conserved motifs comprised mostly of hydrophobic residues. These residues are scattered throughout the protein sequence and thus were not…
The excited electronic states of noble metal Au and Ag nanocrystals are very different than those of molecules. Ag and Au nanocrystal optical transitions (plasmons) in the visible can be so intense that they significantly modify the local electromagnetic field. Also, coherent elastic Rayleigh light scattering is stron…
Here we report bulk superconductivity in ${\mathrm{BaFe}}_{1.8}{\mathrm{Co}}_{0.2}{\mathrm{As}}_{2}$ single crystals below ${T}_{c}=22\text{ }\text{ }\mathrm{K}$, as demonstrated by resistivity, magnetic susceptibility, and specific heat data. Hall data indicate that the dominant carriers are electrons, as expected fr…
Inorganic glass is material having nanoscaled physical and chemical inhomogeneities ad initio because glass inherits thermodynamic fluctuations of concentration, density and anisotropy of a glass forming melt. Combining light scattering and high temperature acoustics data allows to use the effect of internal immersion…
Sm 0.5 Sr 0.5 CoO 3 cathode films for solid oxide fuel cells were deposited on Ce 0.9 Gd 0.1 O 1.95 disks using the electrostatic‐assisted spray pyrolysis method. While an increase of deposition temperature resulted in enhanced evaporation and diminished wetting of aerosol droplets on substrates and led to more porous…
Abstract The complex melting behavior of isotactic polypropylene, after isothermal crystallization, was studied within the context of step‐like melting mechanisms which were previously proposed for high temperature polymers. The morphological characteristics of the melting process were also studied as a function of mo…
Abstract The immiscible polypropylene (PP)/polystyrene (PS) blend was prepared via melt compounding and the preferential intercalation behavior of clay was investigated by wide angle X‐ray diffraction (XRD) and transmission electron microscope (TEM). It was found that the clay platelets initially located in the PS pha…
Abstract In the present study, a model is established to describe the propylene polymerization kinetics catalyzed by the typical catalysts with single‐/multi‐active site type in a liquid phase stirred‐tank reactor using the Monte Carlo simulation method, regardless of the mass and heat diffusion effects within the pol…
The increase in computational power has made performing virtual experiments of various textile architectures using detailed three-dimensional finite element analyses practical. Interpretation of the results remains a challenge. The wealth of raw numerical information provided by the typical finite element analysis pro…
We have performed simultaneous measurements of magnetic neutron diffraction, ferroelectric D – E hysteresis loops and permittivity along the b - and a -axes of multiferroic TmMn 2 O 5 down to 2.5 K. It was confirmed that the permittivity peak coincides with an increase in both the polarization along the b -axis and a…
Zinc oxide (ZnO) and erbium-doped zinc oxide (ZnO:Er) thin films were deposited on heated glass substrates using the spray pyrolysis technique. Third-order nonlinear-optical properties of the thin films have been investigated using the third harmonic generation (THG) at wavelength of 1064 nm in picosecond regime. The…
Thermal properties of polypyrrole–polymethylmethacrylate (PPy–PMMA) composites are analyzed by differential scanning calorimetry (DSC). A decrease in the glass transition temperature Tg with the PPy concentration content reveals the increase of segmental motion. The ac conductivity of these composites is studied in fr…
Newly developed hybrid meta density functionals and density functionals augmented by a classical London dispersion term have been systematically applied for the description of stacking energy and intermolecular distance of thiophene dimer and substituted thiophene dimer. The performance of the various approaches is co…
Abstract The crystallization kinetics of the high‐flow nylon 6 containing polyamidoamine (PAMAM) dendrimers units in nylon 6 matrix was investigated by differential scanning calorimetry. The Ozawa and Mo equations were used to describe the crystallization kinetics under nonisothermal condition. The values of Avrami ex…
We propose a mechanism for the quenching of the Shubnikov-de Haas oscillations and the quantum Hall effect observed in epitaxial graphene. Experimental data show that the scattering time of the conduction electron is magnetic field dependent and of the order of the cyclotron orbit period, i.e., it can be much smaller…