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 a numerical analysis of the mechanical deformation of carbon nanotube (CNT) nano-rings on flat graphite substrates, which is motivated by our recent experimental findings on the elastic deformation of CNT nano-rings. Our analysis considers a perfectly circular CNT ring formed by bending a straight individua…
It is shown that the energy migration between silicon nanocrystals embedded into a silicon dioxide host is caused by the “nonresonant” dipole-dipole interaction. This process is efficient only for a part of small nanocrystals among the whole ensemble of nanocrystals. The nonresonant dipole-dipole energy transfer has s…
Temperature dependences of dielectric constant and second-harmonic generation (SHG) intensity of hexagonal (h-) YbFeO3 thin films deposited on yttrium stabilized zirconia (YSZ) (111) substrates were measured from 300 to 470 K. The results reveal that h-YbFeO3 film is ferroelectric below around 350 K. From the SQUID me…
The grain refining technique of AZ91D magnesium alloy by MgCO3 has been investigated. The refining mechanism and tensile properties of the resulting alloy have also been discussed. The results indicate that MgCO3 can decrease its grain size from 311 to 53µm. Correspondingly, the tensile properties are obviously improv…
A new method of increasing the success rate in protein crystallization screening experiments by combining microseeding with counter-diffusion crystallization in capillaries (SCD) is presented. We have investigated the number of crystallization hits obtained with and without microseeding with 10 model proteins. For the…
Using high resolution numerical simulations, we study the flow of a liquid metal in a pipe subjected to an intense decreasing magnetic field (fringing magnetic field). The chosen flow parameters are such that our study is directly relevant for the design of fusion breeder blankets. Our objectives are to provide a deta…
Abstract As an infrared Raman probe, the molecule 3,3′‐diethylthiatricarbocyanine iodide (DTTC) has received much attention in the past decades due to its potential applications in Raman imaging, single‐cell detection, cancer diagnosis, and surface‐enhanced Raman scattering (SERS). In this work, ordinary Raman, SERS,…
Kaolin-filled PP composites were compounded using a heated two-roll mill prior to extrusion process in order to improve the rheological properties of the samples. The extrudate swell and flow instability (melt fracture) behavior of kaolin-filled PP composite melts were investigated using a constant rate type of capill…
The synthesis of silicon nanoparticles in the reaction of the silane pyrolysis is presented. The reaction of the silane decomposition is performed in a flow reactor in the presence of the cw CO 2 -laser irradiation. As-prepared Si nanoparticles are studied with the aid of transmission electron microscope, fiber spectr…
The critical current density, Jc, flux pinning behavior and magneto- resistance results of BaFe2-xNixAs2 single crystal have been investigated in fields up to 13 T over a temperature range of 2 to 20 K. The magnetoresistance below the superconducting transition temperature (Tc) shows Arrhenius thermally activated beha…
Due to their extraordinary properties, single-walled carbon nanotubes (SWNTs) have a tremendous potential for medical applications such as clinical diagnostics, targeted drug (or gene) delivery and cancer therapy. Hence, effects of SWNTs on living systems as well as mechanisms for biodegradation of SWTNs are of great…
Duplex stainless steels are widely used in industry. This is due to their higher strength compared to austenitic steels and to their higher toughness than ferritic steels. They also have good weldability and high resistance to stress corrosion cracking. These steels are characterized by two-phase microstructures compo…
Abstract To characterize crystals and other particles not only with respect to their size but also to their shape there has been increasing interest over the last decade. Though there are several studies on the geometric problems for single crystals and studies using morphological population balance equations for spec…
The kinetics of charging of dielectric targets during their irradiation with electrons with energy of 2–30 keV are investigated both theoretically and experimentally. The dependences of equilibrium surface potentials and corresponding energies of primary electrons on the irradiation time at different current densities…
Despite extensive research on microscopic structure and physical property characterization of advanced nanocarbon systems, they have not been viewed as topologically distinct nanoscale materials with various geometries (curvature). This work is motivated by our recent work [S. Gupta and A. Saxena, J. Raman Spectrosc.…
Polycrystalline strontium-doped lanthanum manganite (LSM) powders with 0.15, 0.22, and 0.30 mol % Sr were synthesized by the polymeric precursor route using a molar ratio of 3:1 citric acid and metal cations. The powders were characterized by Fourier transform infrared spectroscopy, thermal analysis, high-temperature…
An approach was developed towards design of medium-temperature solid-oxide fuel cells based on a deformation strengthened Ni-Al alloy. Methods of sintering were described that allowed obtaining layers of complex oxides with ionic and mixed conductivity and with regulated porosity in the range of 40–1%. Power density o…
The growth of nanotubes of the Mg 3 Si 2 O 5 (OH) 4 composition with a chrysotile structure has been investigated under hydrothermal conditions. It has been established that the nanotubes in the axial and radial directions grow through the step mechanism due to the recrystallization and mass transfer of the components…
Micropyramids of zinc-doped indium oxide have been grown by thermal treatments of compacted InN and ZnO powders at temperatures between 700 and 900 °C under argon flow. X-ray diffraction (XRD) measurements and energy-dispersive X-ray (EDS) mappings as well as local EDS spectra enable the identification of rough surfac…
Y and Gd demonstrate anomalous solid solution hardening efficiency, which cannot be understood using the elastic impurity-dislocation interaction theory. We performed first-principles calculations to investigate the effect of different alloying elements such as Al, Zn, Y, and Gd on the chemical bonding of Mg solid sol…