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。
Eichhornia crassipes (Water hyacinth) is a hydrophyte which invaded all Egyptian water bodies causing serious problems of navigation and water quality deterioration. Known weight of the sample was successively extracted with hexane (E1), ethyl acetate (E2) and methanol (E3). Antioxidant activity of extracts was perfor…
New heterogeneous photosensitizers were synthesized, in which phthalocyanines of zinc and aluminum, tetrasubstituted at non-peripheral positions with modified thiophenyl groups, were grafted to aminopropyl silica gel. The absorption and fluorescence spectra, and the quantum yields of fluorescence and photosensitized s…
Nanocrystalline vanadium dioxide (VO2) film on c-plane sapphire substrate has been prepared by direct-current magnetron sputter deposition. The electronic band structures of the VO2 film with monoclinic phase have been investigated by ultraviolet-infrared transmittance spectra in the temperature range of 5.3–300 K. It…
1ω and 3ω methods are widely established transient measurement techniques for the characterization of thermal transport in bulk-materials, thin films, and 1D nano-objects. These methods are based on resistance oscillations of a heater caused by Joule-heating from a sinusoidal current at frequency 1ω which lead to chan…
'Fragments' refer to particularly small molecular starting points in medicinal chemistry. The small size of fragments requires adapted techniques for their screening and subsequent elaboration. The detection of the weak binding affinity of fragments for their target, and associated screening issues, have been debated…
This paper deals with the investigation of structural effects on Stokes and anti-Stokes luminescence properties of double-perovskite (Ba,Sr)2CaMoO6: Eu3+,Yb3+. It is found that the tilting of the (Ca/Mo)O6 octahedra framework favors energy transfer from the MoO6 group to Eu3+/Yb3+ at the B site for Stokes luminescence…
Epitaxial graphene can be formed on silicon substrates by annealing a 3C-SiC film formed on a silicon substrate in ultrahigh vacuum (G/3C-SiC/Si). In this work, we explore the graphitization process on the 3C-SiC(111)/Si(111) surface by using low-energy electron diffraction and X-ray photoelectron spectroscopy (XPS) a…
With increasing thermal fluxes, the performance of thermal interface materials (TIMs) that are used to reduce the thermal resistance between contacting surfaces in electronic devices, such as at the die-to-heat sink or heat spreader-to-heat sink interfaces, is becoming critical. However, measuring the thermal resistan…
This study concerns the encapsulation and controlled release of both hydrophobic and hydrophilic medications with one polymer, which are delivered together as a combined therapy to treat diseased tissue. To test our hypothesis that the novel PEG-graft-PLA (PEG, polyethylene glycol; PLA, polylactic acid) can deliver bo…
The main goal of the carried out investigations was to examine behaviour of hydrogen isotopes (and evaluation of interaction parameters such as coefficients of diffusion, permeation and solubility) in materials of first wall and divertor of fusion facility in conditions approximate to its real working i.e. under simul…
The purpose of this paper was to analyze structural and optical properties of gadolinia-doped ceria (GDC, Ce0.9Gd0.1O1.95) thin films.At first the ceria-gadolinia multilayer sandwich systems (4-12 layers) were deposited using reactive magnetron sputtering in the O2/Ar gas mixtures.The films were formed with ≈ 90% ceri…
Through particle swarm optimization algorithm and first-principles structural optimizations, we have predicted two novel low-energy structures of BC7: graphite-like Amm2 structure and diamond-like P-4m2 structure. Structural stability of the proposed BC7 polymorphs was confirmed by calculating the elastic constants an…
In this paper two theoretical beam models are proposed for the vibration analysis of fluid-conveying nanotubes using the theory of strain gradient elasticity combined with inertia gradients. For comparison purposes, two stress gradient elasticity beam models were also discussed. Both theories were formulated using eit…
We study theoretically the population inversion in intrinsic graphene under optical pulse excitation at room temperature. We develop the theoretical model of carrier relaxation dynamics based on the rate equations derived from the quasi-classical Boltzmann equation. We take into account the energy relaxation and recom…
Polysuccinimide (abridged as PSI) was synthesized by urea and maleic anhydride. Aminobenzenesulfonic acid (ABSA) was introduced at different mole ratio to PSI to generate polyaspartic acid (abridged as PASP)/ABSA graft copolymer. The scale inhibition behavior of resultant PASP/ABSA copolymer was evaluated by using sta…
Tungstate turnpike: Mesoporous polymer-supported polyoxotungstate acts as an effective heterogeneous catalyst in the liquid-phase olefin epoxidation using H2O2. The effectiveness is attributed to the optimized hydrophobic/hydrophilic balance within the uniform mesoporous environment. Furthermore, the catalyst can be r…
The article presents the analytical model of a linear/rotary solid-state actuator formed by a shape memory wire wound over a cylindrical drum. The model assumes a bilinear stress-strain behavior of the wire in the martensitic state (low temperature) and a linear elastic response in the austenitic state (high temperatu…
A simple and effective color tuning method has been developed by controlling the pore depth of the metal-coated porous alumina (PA) template. The mechanism for color tuning in this method was uncovered, which can be used to design a colorful complex pattern. A colorful 'world map' was produced and exhibited on a PA te…
The effects of the elastic deformation on the mechanical and physical properties of graphene are a subject of intensive current studies. Nevertheless, the stability range for a flat graphene sheet subjected to in-plane deformation is still unknown. Here, this problem is solved by atomistic simulations. In the three-di…
ABSTRACT A modified procedure for the extraction of α‐zein from corn gluten meal was developed and compared against a commercial extraction method. The modification involved raising the concentration of alcohol in solvent and removing the precipitate by centrifugation. Five organic solvent mixtures were compared using…