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。
Abstract Different strategies for obtaining nanowires (NWs) with ferromagnetic properties using the molecular beam epitaxy (MBE) grown nanostructures combining GaAs and Mn were investigated. Four types of structures have been studied: (i) self‐catalyzed GaAs:Mn NWs grown at low temperatures on GaAs(100) substrates; (i…
First-principles calculations based on density functional theory and strengthened by Hartree–Fock computations have been performed to study a Ga-doped wurtzite-type ZnO crystal. The large 108-atom supercell used throughout this work allows one to model a single point defect within the periodic supercell model. Thus, t…
Ultrathin glycine-water ice films have been prepared in ultrahigh vacuum by condensation of H(2)O and glycine at 90 K on single crystalline alumina surfaces and processed by soft x-ray (610 eV) exposure for up to 60 min. The physicochemical changes in the films were monitored using synchrotron x-ray photoemission spec…
Abstract Poly( L ‐lactide) (PLLA) freeze‐dried from dilute 1,4‐dioxane solutions exhibited very porous structure composed of thin membranes of which the mean thickness was estimated to be 104–135 nm. Heating measurements of differential scanning calorimetry (DSC) showed that the freeze‐dried PLLA (FDPLLA) exhibits an…
Abstract This work focuses on the effect of tackifiers on mechanical and dynamic properties of carbon‐black‐filled vulcanizates. Three types of tackifiers with difference in softening points are selected for study including petroleum resin, phenolic resin, and gum rosin. The effect of tackifiers on the retardation of…
We investigate the quantum-mechanical localization of 1 H and 2 H isotopes in the symmetric low-barrier hydrogen-bonds of potassium dihydrogen phosphate (KDP) crystals in the paraelectric phase. The spatial density distributions of these hydrogen atoms are suspected to be responsible for the surprisingly large isotope…
Highly ordered, uniform Cu 7 S 4 hollow cubes have been successfully synthesized in a mild, low-temperature condition from freshly prepared solid Cu 2 O cubes. Cu 2 O cubes have been synthesized at ∼80 °C, exploiting the water-soluble Cu(II)–EDTA complex (λ max = 730 nm) as precursor and glucose as reducing agent unde…
In this study, we report fabrication and characterisation of a nanocomposite system composed of a commercial resin and extremely small (several nanometres in diameter) titanium dioxide particles. Nanoparticles were synthesised in situ with particle nucleation occurring inside the resin matrix. In this nanodielectric f…
Abstract The current work seeks to develop a novel polymeric blend containing polycarbonate(PC)/poly(trimethylene‐terephthalate)(PTT)/poly(butylene‐terephthalate)(PBT), (50: 25:25, weight/weight percent). This has been prepared using a single screw extruder. The thermal degradation kinetics of the blend and neat polym…
This work evaluates the effect of ZnCl2 and Zn(NO3)2.6H2O as precursors in the synthesis of ZnO nanocrystals. The materials were obtained at 90 ºC by a simple solochemical route. The resulting samples were characterized regarding phase composition, particle size and morphology, by means of XRD and TEM. The analysis ha…
Steady-state UV-visible and FTIR spectroscopies were used to characterize the electronic and structural changes that occur in polyaniline (PANI) thin films over the course of a single deprotonation and reprotonation cycle. The dedoping from the emeraldine salt (PANI-ES) to the emeraldine base (PANI-EB) form was achiev…
We investigated the homogeneous coexistence of spin-density-wave (SDW) and superconducting (SC) states via $^{75}\mathrm{As}$-nuclear magnetic resonance (NMR) in CaFe${}_{1\ensuremath{-}x}$Co${}_{x}$AsF and found that the electronic and magnetic properties of this compound are intermediate between those of LaFeAsO${}_…
Abstract Graft copolymerization of poly(acrylonitrile) onto cassava starch was carried out with potassium persulphate (PPS) as the free radical initiator using a response surface Box–Behnken design. Different levels of monomer concentration, initiator concentration, and temperature were used, and regression models wer…
Abstract Atomistic simulations have a unique capability to reveal the material deformation mechanisms and the corresponding deformation‐based constitutive behavior. However, atomistic simulations are limited by the accessible length and time scales. In the present work an equivalent crystal lattice method is used to p…
Phosfinder is a web server for the identification of phosphate binding sites in protein structures. Phosfinder uses a structural comparison algorithm to scan a query structure against a set of known 3D phosphate binding motifs. Whenever a structural similarity between the query protein and a phosphate binding motif is…
Abstract Ferromagnetic transition and magnetic anisotropy was studied by SQUID magnetometry and ferromagnetic resonance (FMR) methods in polycrystalline Ge 1‐ x Mn x Te ( x = 0.085) semiconductor microstructures embedded in an amorphous, insulating, and paramagnetic (Ge,Mn)Te matrix. The microstructures were produced…
Facile synthesis of several new kinds of spiropyrans has been accomplished through the condensation of chromene hemiacetal esters with bifunctional nuclephiles, in which previously nonpractical amination and amidation processes help each other and all become practical processes of the corresponding tandem reactions.
The atomic mechanism of a glass-to-liquid transition in a monatomic Lennard-Jones (LJ) glass was studied using the molecular dynamics (MD) method. Glassy models were heated up from low temperature at two different heating rates and a glass-to-liquid transition found to occur at the higher heating rate. The temperature…
On-demand, high repetition rate sources of indistinguishable, polarized single photons are the key component for future photonic quantum technologies (O'Brien et al 2009 Nat. Photonics 3 687–95). Colour centres in diamond offer a promising solution, and the narrow linewidth of the recently identified nickel-based NE8…
Abstract Pressure‐assisted thermal processing (PATP) is an advanced thermal process involving application of elevated pressures above 600 MPa on a preheated food for a holding time of 3 to 5 min, causing the volumetric temperature of food to increase above 100°C, to inactivate bacterial spores and enzymes. This study…