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。
Well-aligned Cu doped ZnO nanorods were synthesized by simple radio frequency plasma deposition in the absence of extra catalysts. The synthesized nanorods having a typical average diameter of about 60nm, were about 700nm in length and well aligned along the normal direction of the substrate. Magnetic measurements ind…
The 1:1 structural order and B‐site cation order in Pb(Mg 1/3 Nb 2/3 )O 3 ceramics was significantly enhanced by Zr 4+ substituting Nb 5+ according to the chemical formula Pb(Mg 1/3 Zr 2 x /3 Nb 2(1− x )/3 )O 3− x /3 . The enhanced structural and cation order was revealed by both X‐ray diffraction and transmission ele…
Reduktion mit CaH2 überführt den Doppelschichtperowskit Sr3Fe2O7 in die zweibeinige Leiterverbindung Sr3Fe2O5 mit S=2. Dieser Prozess und die Synthese von SrFeO2 eröffnen Perspektiven für die Festkörperchemie und -physik einer Reihe von n-beinigen Leitern Srn+1FenO2n+1. Das Bild illustriert die Strukturänderungen von…
The As-doped p-type (Zn0.93Mn0.07)O layers show a strong dependence of their ferromagnetic properties on the hole conductivity that were controlled through the modification of negative background-charge density by changing the oxygen partial pressure during the initial growth stage before As doping. Curie temperature…
Abstract Finely ground rice husk was used as a filler in two commercial grades of polypropylene (PP) in different amounts. Rice husk powder was chemically treated with dilute hydrochloric acid, dilute sodium hydroxide solution, and dimethyl sulfoxide. The mechanical, thermal, and rheological properties of PP filled wi…
Bi Sc O 3 – Li Sb O 3 – Pb Ti O 3 solid solutions with perovskite structure were prepared by the conventional mixed oxide method. X-ray diffraction showed that a change in symmetry from rhombohedral to tetragonal as the mole fraction of PbTiO3 larger than 62%. In the vicinity of the morphotropic phase boundary, the ce…
Optical properties of implanted Si in a silicon nitride (Si3N4) thin film have been determined with spectroscopic ellipsometry based on the Tauc–Lorentz (TL) model and the Bruggeman effective medium approximation. It is shown that the suppressed dielectric functions of the implanted Si are dominated by the energy tran…
The authors report the electron field emission from a single carbon nanofiber (CNF) over a range of anode to CNF tip separations of 20–5500nm. Our results show that the field enhancement factor γ is associated with the electrode separation (S). The modified Miller equation is a reasonable empirical model to describe t…
Differences in cashmere production and fleece attributes associated with farm of origin, age and sex were quantified for commercial Australian cashmere goat enterprises. From 11 farms in four states, 1147 does and 97 wethers were monitored, representing 1- to 13-year-old goats. Individual clean cashmere production ran…
A K- and Q-band electron spin resonance study, combining two detection modes, on structures composed of Si nanoparticles (∼2nm across) embedded in a SiO2 matrix obtained by annealing of SiO∕SiO2 superstructures unveils the observed principal Si dangling bond signal as solely comprised of the intrinsic Pb(0) and Pb1 Si…
We describe the design and fabrication of nanostructured silver split-ring resonators and demonstrate their application as dichroic sensors for multipurpose visible wavelength molecular spectroscopy. By producing arrays of these identical nanostructures, with critical dimensions of 30–150nm, we demonstrate the control…
Abstract The term homogeneous has been applied to molluscan microstructures that lack a readily discernible microstructure and as a result, it has become rather a ‘dustbin’ term, covering a multitude of unrelated finely crystalline textures. Here we investigate in detail the outer ‘homogeneous’ layer of the lyonsiid b…
We report a structural transformation between the regular wurtzite and the unbuckled wurtzite (hexagonal) structure for ultrathin single-crystalline [0001] ZnO nanowires under uniaxial elongation and compression. Our density functional calculations show that hexagonal structure corresponds to a distinct minimum on the…
Zn 0.97 Co 0.03 O nanocrystalline powders were prepared by sol-gel method with a low annealing temperature of 450°C. The as-synthesized Zn0.97Co0.03O powders were paramagnetic. However, after compaction under a pressure of 94MPa, the Zn0.97Co0.03O pressed powders show a weak room-temperature ferromagnetism embedded in…
We report an evaporation assisted plasma lithography (EAPL) process for guided self-assembly of a biomimetic silk-elastinlike protein (SELP). We demonstrate the formation of SELP structures from millimeter to submicrometer range on plasma-treatment surface templates during an evaporation-induced self-assembly process.…
We investigated magnetic and structural properties at the surface of epitaxial Ni2MnGa(110) Heusler films using x-ray absorption spectroscopy and x-ray magnetic circular dichroism both in transmission and total electron yield mode. The magnetic shape memory films were prepared by dc sputtering from a stoichiometric ta…
Abstract Three types of zinc ferrite samples ZnFe 2– x Y x O 4 ( x = 0, 0.3 and 0.6) and two of nickel–zinc ferrites Ni 0.5 Zn 0.5 Fe 2– x Y x O 4 ( x = 0 and 0.3) were prepared by a low‐temperature chemical co‐precipitation method in order to examine the influence of yttrium ions on the electrical properties of these…
The mechanical properties of electrospun fibers are influenced by crystallinity and molecular orientation, and their crystal structure is controlled by the processing parameters and the electrical and rheological properties of the polymer solution. The auxiliary electrode has been widely used as a stabilizing tool in…
Mixtures of Zr+B and Hf+B were shock compacted into bulk samples possessing relative densities above 95.5% and were subsequently converted to ZrB 2 and HfB 2 ceramic components by a heat treatment. The conversion temperature was varied between 1600° and 2000°C. The conversion temperature was found to have no effect on…
Spider silk possesses a unique combination of high tensile strength and elasticity resulting in extraordinarily tough fibers, compared with the best synthetic materials. However, the potential application of spider silk and biomimetic fibers depends upon retention of their high performance under a variety of condition…