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 authors constructed the finite cluster model of bamboolike carbon nitride nanotubes taking the C9N5H3 as an example. As desired, the C9N5H3 bamboolike nanotubes were prepared in a facile solvent-free system. Both x-ray photoelectron microscopy and elemental analysis give its formula of C9N5H3, while the UV-vis and…
The Patterson techniques, recently developed by the same authors for the ab initio crystal structure solution of proteins, have been applied to single and multiple anomalous diffraction (SAD and MAD) data to find the substructure of the anomalous scatterers. An automatic procedure has been applied to a large set of te…
Photoemission electron microscopy is used to study copper diffusion through a ruthenium thin film. The photoemission electron microscopy images display a large contrast between Cu and Ru due to the differences in work function, making photoemission electron microscopy an ideal methodology to study thin film diffusion…
Abstract Four liquid solvents – 1,1,1‐trichloroethane, toluene, chlorobenzene and octane – are used as model contaminants in sorption experiments in polyethylene in order to study their diffusion behavior between 40 and 70 °C and assess the plausibility of utilizing recycled plastics as safe functional barriers in foo…
Abstract In this work, we report about the relationships between the linear rheology and the microstructure of a polymer‐nanoparticle model system (i‐PP/Al 2 O 3 nanospheres). Over a critical particle volume fraction, rheological evolutions during a quasi‐quiescent thermal annealing indicate the formation of a whole‐s…
Using ab initio total energy density-functional theory calculations, we investigated the electronic, structural, and magnetic properties of manganese-doped germanium nanowires. The nanowires have been constructed along the [110] direction and the dangling bonds on the surface have been saturated by hydrogen atoms. We…
The authors report on an approach to establish intrinsic polarization properties in bismuth-layered ferroelectric films by piezoelectric coefficient and soft-mode spectroscopy, as well as by a direct polarization–electric field hysteresis. In epitaxially grown (Bi4−xNdx)Ti3O12 (0⩽x⩽0.73) films, they show that these co…
Abstract Conducting polymer blends based on styrene–butadiene–styrene (SBS) triblock copolymer and polyaniline doped with dodecylbenzene sulfonic acid (Pani.DBSA) were prepared by different procedures: mechanical mixing (MM) and ‘in situ’ polymerization (ISP) methods. The ISP blends exhibited higher levels of electric…
Direct current (DC) flowing through the earthed neutrals of transformer windings causes a DC component in the magnetising current. Owing to non-linearity, the waveform of this current is strongly distorted. A method based on the finite element analysis of a transformer is presented that is capable of predicting the wa…
A method to significantly extend the operational lifetime of alkali-based photocathodes by diffusing cesium to the surface at moderate temperature is presented and shown to restore the quantum efficiency (QE) of cesiated tungsten. Experimental measurements of QE as a function of surface cesium coverage compare excepti…
The ferroelectric (Pb,Sr)TiO3 (PST) thin film with ZrO2 insulating buffer on Si and SiON(3nm)∕Si substrates was fabricated by rf magnetron sputtering. ZrO2 demonstrates excellent insulating properties on either Si or SiON∕Si substrates. The metal-ferroelectric-insulator-semiconductor structure shows low leakage curren…
The electronic structure of Fe-doped ${\mathrm{SnO}}_{2}$ is systematically investigated by means of first-principles calculations. A ferrimagnetic exchange interaction between the dopants, which is rarely found in dilute magnetic semiconductors, is predicted for the ground doping configuration in which two Fe ions ar…
The anisotropic superconducting properties of single crystals of ${\mathrm{Cu}}_{0.07}\mathrm{Ti}{\mathrm{Se}}_{2}$ were studied by measurements of magnetization and electrical resistivity. ${T}_{c}$ is around $3.9\phantom{\rule{0.3em}{0ex}}\mathrm{K}$, and the measured upper critical field $({H}_{c2})$ values are $\e…
The controllable and sustained release of DNA from the surfaces of biomaterials or biomedical devices represents a new method for localized gene delivery. We report the synthesis of a novel polycation containing disulfide bonds in its backbone and the fabrication of polycation/plasmid DNA multilayered thin films by la…
The unique water/PVP (polyvinylpyrrolidone)/n-pentanol interface has been developed to prepare the ZnO particles with hexagonal bilayer structure. By modifying the interface through varying the amount of PVP and water, one can readily tune the particle size and change the particle shape from hexagonal bilayer to cappe…
A simple symmetry adapted search algorithm (SASS) exploiting point group symmetry increases the efficiency of systematic explorations of complex quantum mechanical potential energy surfaces. In contrast to previously described stochastic approaches, which do not employ symmetry, candidate structures are generated with…
The magnetization and electrical transport in the superlattices consisting of ferromagnetic La0.67Sr0.33MnO3 and nonmagnetic insulating SrTiO3 layers have been investigated. A significant displacement of the hysteresis loop along the field axis is observed when the sample is field-cooled through the blocking temperatu…
Abstract Large positive thermal expansion in polymers is one of the major drawbacks in using polymers in applications where the sample dimensions play an important role. In this paper, we report a method to vary the thermal expansion of PMMA‐based polymer composites by blending with a negative thermal expansion materi…
The grain size effect on the thermal conductivity in BaTiO3 nanoceramics was investigated. The nanoceramics were produced by the low temperature high pressure technique. The averaged sizes of grain varied from 30to100nm. It was found that the thermal conductivity of BaTiO3 nanoceramics decreased with decreasing the gr…
Results of simultaneous thermal analysis, synchrotron and neutron powder diffraction in the range from room temperature up to the melting point at 936 K on non-superionic orthorhombic β-AgCuS as well as on superionic hexagonal α- and cubic δ-AgCuS are reported. On heating the sample is only stable in argon. The follow…