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。
Opening up a band gap and finding a suitable substrate material are two big challenges for building graphene-based nanodevices. Using state-of-the-art hybrid density functional theory incorporating long-range dispersion corrections, we investigate the interface between optically active graphitic carbon nitride (g-C(3)…
Silver nanoparticles (Ag-NPs) readily transform in the environment, which modifies their properties and alters their transport, fate, and toxicity. It is essential to consider such transformations when assessing the potential environmental impact of Ag-NPs. This review discusses the major transformation processes of A…
Supramolecular polymers can be random and entangled coils with the mechanical properties of plastics and elastomers, but with great capacity for processability, recycling, and self-healing due to their reversible monomer-to-polymer transitions. At the other extreme, supramolecular polymers can be formed by self-assemb…
A novel magnetic chitosan microsphere (MCM) was prepared from chitosan and Fe3O4 through inverse suspension crosslinking, epichlorohydrin activation, and grafted with ligands. The magnetometer measurements data indicated that the magnetic microspheres had superparamagnetic property as well as fast magnetic response wi…
The magnetic and crystalline properties of Bi0.9Pb0.1FeO3/SrRuO3(100 nm)/SrTiO3 heterostructures with different thickness of Bi0.9Pb0.1FeO3 (80–400 nm) are studied. The heterostructure undergoes a strain relaxation at each interface. Surprisingly, the crystal lattice of the bottom SrRuO3 layer can be manipulated by th…
Abstract Water flooding is the hinge pin for Gemsa Oil Field. Water injection is supplied from shallow water supply wells. Compatibility tests had indicated probable deposition of calcium sulphate scale on surface and subsurface production equipment. Calcium sulphate scale has been recognized to be a major operational…
Two different carbons, namely CAS-P-500 and CRH-P-500, were prepared from apricot stones and rice husk by H3PO4-activation at 500 ºC and H3PO4/precursor (wt/wt) impregnation ratio of 2:1 followed by water washing and desilication by NaOH solution respectively. Elemental analyses of both samples using X-ray fluorescenc…
Abstract Water is a key element in oil and gas operations. Many operations need and/or are performed most ideally with fresh water, but its availability is decreasing in some locations around the world. One area of particular concern is offshore operations to stimulate carbonate formations. Acid stimulation fluids are…
A generic solid oxide fuel cell ( SOFC ) test fixture was developed to evaluate candidate materials under realistic operating conditions. A commercial 50 mm × 50 mm NiO‐ YSZ anode‐supported thin YSZ electrolyte cell with lanthanum strontium manganite ( LSM )/ YSZ cathode was tested to evaluate the stability of candida…
First-principles calculations were performed to investigate the effects of external pressure on the properties of intrinsic point defects in monoclinic zirconia. Our results show that when the applied external pressure increases from atmospheric pressure to 14.9 GPa, the formation energies of oxygen vacancies decrease…
In this work, the spin-echo nuclear magnetic resonance (NMR) technique is used to probe the local structure of Co2FeAl0.5Si0.5 bulk samples. The 59Co NMR spectrum of the Heusler compound Co2FeAl0.5Si0.5 consists of four main resonance lines with an underlying sub-structure. The splitting into the main resonance lines…
Electron beam lithography was used to nanofabricate 12 and 63 nm Cu clusters supported on silica (model nanoarray catalysts). The Cu clusters could reversibly be oxidized and reduced at ultrahigh vacuum conditions. The chemical activity of these clusters was probed by Auger and X-ray photoelectron spectroscopy, therma…
We synthesized the polycrystalline manganite of La 5/8 Ca 3/8 MnO 3 with three different manganese routes prepared through a solid state reaction method. The effects of the manganese route selection on the structure, electrical transport and magneto-transport properties were examined in this study. The samples were ch…
Based on the framework of the effective-mass theory, the Hamiltonians of the electron and hole states of the wurtzite structure in the magnetic field are derived. The obtained Hamiltonians can then be solved by the Bessel function expanding method in which the electron and the hole are assumed to be confined in the in…
Abstract Coreflood experiments are an integral part of the selection and optimisation of scale inhibitor treatments, providing information on formation damage, inhibitor return profiles and dynamic retention isotherms. Comparative returns are often used to select the chemical for field treatments. However, significant…
The chemical attachment and field emission (FE) properties of single-walled carbon nanotubes (SWCNTs), double-walled carbon nanotubes (DWCNTs), and multi-walled carbon nanotubes (MWCNTs) chemically attached to a silicon substrate have been investigated. A high density of CNTs was revealed by atomic force microscopy im…
Biodegradable plastics based on biomass are currently the subject of active research. However, they have shortcomings that include weak mechanical properties and high prices. Therefore we added wood powder and rice bran, which are generated as by-products from natural raw materials. In addition, a microcellular foamin…
Ferngesteuert: Als Titelreaktion wird die erste katalytische dehydrierende Cyclisierung (CDC) von Diamin-Monoboranen zur Bildung cyclischer Diaminoborane vorgestellt. Die Cyclisierung hängt stark vom Substitutionsmuster der entfernt stehenden Aminogruppe ab.
This paper examines the structural properties of gallium phosphide layers by high resolution x-ray diffraction and atomic force microscopy measurements. GaP layers are grown on misoriented and nominally exactly oriented silicon (001) substrates by metalorganic vapor phase epitaxy. Structural characterization is perfor…
Synthetic, structural, thermogravimetric, Mössbauer spectroscopic, and magnetic studies were performed on two new isotypic germanophosphates, M(II)(4)(H(2)O)(4)[Ge(OH)(2)(HPO(4))(2)(PO(4))(2)] (M(II) = Fe, Co), which have been prepared under hydro-/solvo-thermal conditions. Their crystal structures, determined from si…