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 temperature dependence of the conductance of a suspended carbon nanotube, as probed by means of a scanning tunneling microscope (STM) tip, is analyzed. Employing the theory of coupling between electronic and vibronic degrees of freedom, local linear and nonlinear transport features are studied as a function of tem…
To synthesize Au nanorods without the use of seed crystals, we applied gamma-ray irradiation from 60 Co radioactive source to reduce aqueous solution containing Au ions. The total dose was fixed to 6.0 kGy with various dose rates from 0.4 to 13.6 kGy/h. After the irradiation, two surface plasmon bands in the range aro…
We have demonstrated a facile protocol for synthesizing CuO and Cu2O mixed-phase nanostructures by anodization of copper hydroxide (Cu(OH)2) nanoneedles and their heat treatment in different atmospheres, which affect photocatalytic degradation efficiency. The oxygen annealed sample had relatively small (100 nm) lamell…
Separation and recovery of tetramethyl ammonium hydroxide (TMAH) was investigated using several types of MCM-41 (mesoporous silica having hexagonal structure) adsorbents. The MCM-41s were prepared by hydrothermal synthesis with structure-directing agents with different alkyl chains. The prepared MCM-41s were character…
Poly(L-lactic acid) (PLLA)/polyurethane (PU)-blend films were prepared by casting the polymer blend solution in chloroform. Surface morphologies of the PLLA/PU-blend films were investigated by scanning electron microscopy (SEM). Thermal, mechanical, and chemical properties of PLLA/PU-blend films were studied by differ…
The last decade has witnessed enormous improvement in the area of nanofillers on electrical, thermal and mechanical properties of polymeric materials. The dielectric and thermal properties of standard enamel and various nanofiller mixed enamel were detailed and analyzed. Nanopowders of ZrO 2 , Al 2 O 3 , CNT and ZnO w…
The permanent photoinduced valence manipulation of samarium doped oxyfluoroborate glasses as a function of γ-ray irradiation has been investigated using a steady-state fluorescence and electron paramagnetic resonance techniques. An increase in SrF2 content in the glass led to the red shift of the peaks in as prepared…
A calculation method for accurately computing the displacement, image stress, and image energy induced by defects, such as cavities, precipitates, finite dislocation segments, and dislocation loops, in a free-standing anisotropic thin crystal film is presented. The anisotropic image stress is derived in the Fourier sp…
In the article the cooperative energy transfer in GeO2GaOBaO glass system doped with Yb 3+ /Tb 3+ under 980 nm laser diode excitation was investigated. The inuence of Tb 3+ concentration on the luminescent properties was determined. Measured strong luminescence at 489, 543, 586, 621 corresponds to 5 D4 7 FJ (J = 6, 4,…
Inorganic nanomaterials of different chemical compositions are conventionally synthesized under harsh environments such as extremes of temperature, pressure, and pH. Moreover, these methods are eco-unfriendly and cumbersome, yield bigger particles, and agglomerate because of not being capped by capping agents. In cont…
This study was undertaken to optimize the vulcanization conditions and explore the effect of residual peroxide in the peroxide vulcanization of natural rubber. The study was followed through the kinetics of the vulcanization reaction at various temperatures viz. 150,155,160 and 165°C. Dicumyl peroxide (DCP) was used a…
Samples of Nd-Fe-B alloys, which have been the main hard-magnetic materials with the highest magnetic energy since the end of the 1980s, are investigated. Magnets based on them are obtained by liquid-phase sintering or spin coating. In this article, wetting of the Nd2Fe14B grains by the neodymium-enriched liquid phase…
Solubility of cellulose, chitin, and chitosan in seven ionic liquids of varied structure was studied. It was found that pressure, temperature, and amount of an aprotic diluent (dimethyl sulfoxide) affect the dissolution of cellulose and chitin in an ionic liquid. The variation of the degree of polymerization of cellul…
We propose a model of ripples in suspended graphene sheets based on plate equations that are made discrete with the periodicity of the honeycomb lattice and then periodized. In addition, the equation for the displacements with respect to the planar configuration contains a double-well site potential, a nonlinear frict…
Novel electrically conducting nanocomposite materials comprising of poly (pyrrole) (PPy) nanoparticles dispersed homogeneously in a poly (vinyl alcohol)-g-poly (2-acrylamido-2-methyl-1-propanesulphonic acid-co-acrylonitrile) matrix were prepared by in situ polymerization of pyrrole. Radiation shielding potential of so…
In this paper, we report a detailed characterisation of chromium doped iron oxide catalysts using a range of techniques to establish the nature of chromium species in the near surface and bulk of iron oxide, high-temperature shift (HTS) catalysts. In particular we have employed X-ray absorption spectroscopy Cr K-edge…
Protective coatings are formed on different magnesium-based alloys (Mg-Mn-Ce, Mg-Zn-Zr, Mg-Al-Zn-Mn, Mg-Zn-Zr-Y, and Mg-Zr-Nd) by plasma electrolytic oxidation. Electrochemical and mechanical properties of the coatings are studied, as well as their chemical and phase compositions and structures. Analysis of the data o…
The synthesis and structural characterization of BanYFen-1O2.5n (n = 2, 3, 4) anion-deficient perovskite phases is reported. The n = 2 and n = 3 members of the series, Ba2YFeO5 and Ba3YFe2O7.5, adopt structures which consist of ordered arrays of corner-linked YO6 octahedra and FeO4 tetrahedra on the perovskite B-sites…
This paper present a study of carrier transport in graphene nanoribbon (GNR) transistors using three-dimensional quantum mechanical simulations based on a real-space approach of the non-equilibrium Green's function formalism in the ballistic and dissipative limit. The carrier transport parameters are determined in the…
Deposits of aggregated silver particles were grown from aqueous silver-nitrate solution by electron-beam induced deposition in a liquid cell in a scanning electron microscope. Electron energies of 2, 5, and 20 keV were evaluated and found to produce distinguishably different deposits. Optimal energies exist for maximu…