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。
2010 marked the 30th anniversary of the High-Electron Mobility Transistor (HEMT). The HEMT represented a triumph for the, at the time, relatively new concept of bandgap engineering and nascent molecular beam epitaxy technology. The HEMT showcased the outstanding electron transport characteristics of two-dimensional el…
In this study, stress-relaxation performance of HDPE-based injection-molded composites containing four types of natural fibers (i.e., wood flour, rice hulls, newsprint, and kenaf fiber) at 25 and 50 wt% contents, and the effect of prescribed strain levels were investigated. The results indicated that incorporating mor…
Using Monte Carlo simulations of a wormlike chain that contains the excluded-volume interaction, we demonstrate that a directionally anisotropic state exists at high surface coverage, when the chain is confined to a spherical surface. The isotropic-anisotropic transition has first-order characteristics and can be comp…
Sb-doped Mg 2 Si was prepared by solid-state synthesis and thermoelectric properties were examined. All the Sb-doped Mg 2 Si compounds showed n-type conduction, indicating that the electrical conduction is mainly due to electrons. The electrical conductivity significantly increased and the absolute value of Seebeck co…
Targeted magnetic resonance contrast agents (e.g. iron oxide nanoparticles) have the potential to become highly selective imaging tools. In this context, quantification of the coupled amount of protein is essential for the design of antibody- or antibody fragment-conjugated nanoparticles. Nevertheless, the presence of…
A series of ferrocene-based calamitic mesogens with a 2-phenylbenzoxazole unit have been synthesised. The length of the terminal O-alkyl chain and the alkyl spacer length were varied. All exhibit liquid crystalline phase behaviour and showed only smectic C (SmC) phase transition. The phases are stabilised over a wide…
A freeze–gel casting method has been proposed to fabricate porous mullite–alumina composite with controlled ‘designer’ pore structure and improved compressive strength. In this work, a tertiary butyl alcohol–coal fly ash slurry system with appropriate addition of Al2O3 was used. Unidirectional aligned macropore channe…
Abstract In order to get a better understanding of the mechanism governing hydrogen absorption behavior in Zr-based alloys, various characterization techniques were applied to the oxide layers of three alloys: Zry-2, GNF-Ziron (Zry-2-based alloy with ∼0.26 wt % Fe), and VB (Zr-based alloy containing ∼0.5 wt % Sn, ∼0.5…
The presence of carbon on the surface and in deep layers of oxide coatings produced by plasmaelectrolytic oxidation is studied. Graphite is found in the coatings formed on titanium under the conditions of cathodic polarization in an organic electrolyte. Carbon in the amount of 16–40 at % is present on the surface of c…
Chitosan is a modified carbohydrate polymer derived industrially by hydrolyzing the aminoacetyl groups of chitin. It is a natural, biodegradable, biocompatible, non-toxic, and anti-bacterial poly-saccharide available in different forms such as solution, powder, flake, fiber and film. Due to its wide range of physical…
Serials Li 2 O-Al 2 O 3 -SiO 2 matrix glasses and glass-ceramics with different content of P 2 O 5 were prepared by conventional melt cooling method and crystallization process.The effects of P 2 O 5 content on microstructure and properties such as viscosity, melting temperature and coefficient of thermal expansion (C…
Multifunctional multiferroic materials such as the single phase compound Pb(Fe0.5Nb0.5)O3 (PFN), where ferroelectric and antiferromagnetic order coexist, are very promising and have great interest from the academic and technological points of view. In this work, coupling of the ferroelectric and magnetic moments is re…
The collagen was blended with polyvinyl alcohol (PVA) with the maximum maintenance of the natural structure as precondition. The apparent viscosity and rheology property of PVA-collagen blended solution were studied. the mechanical properties of the blend membrane formed from PVA-collagen blended solution were also de…
The corrosion behavior of Al-RE coating in copper accelerated acetic acid salt spray test (CASS) was studied by electrochemical impedance spectroscopy (EIS). Typical EIS spectral changes were clearly observed during the CASS process. The EIS was shown to be a very useful tool for studying corrosion resistance mechanis…
The EPR parameters and the local structure for Co2+ in ZnO are deduced from the perturbation formulas of these parameters for a 3d7 ion in a trigonally distorted tetrahedron. The ligand orbital and spin-orbit coupling contributions are taken into account uniformly from the cluster approach in view of the covalency of…
The atomic structure of a single crystal of one of four Na0.69WO3 phases, which exist below 293 K, has been refined from neutron diffraction data (WWR-c reactor at the Karpov Institute of Physical Chemistry, Obninsk Branch; λ = 1.168 Å; λ/2 contribution < 0.8%; sinθ/λ ≤ 0.810; T = 288 K; crystal sphere ∅ = 4.4 mm; cub…
The use of textile and flexible composites for the containment of high-speed fragmentation is well established; the design of body armour, fragmentation curtains and bomb blankets are end products, routinely deployed. In this paper an experimental program is conducted to test a new composite material of (3D-weaveTM Ke…
Abstract Polyphenylene oxide (PPO) possesses excellent mechanical properties and heat resistance but extremely high viscosity. Virgin PPO has to be blended with polystyrene (PS) to reduce the viscosity. However, PS is miscible with PPO; it reduces not only the viscosity but also the heat distortion temperature and, co…
Essence oil is difficult to microencapsulate and difficult to envelop into wall to prepare pressure sensitive microcapsules. With styrene maleic anhydride copolymer (SMA) as the protective colloid, the paper studied the effects of protective colloid and micro-encapsulation of pressure sensitive perfume microcapsules w…
The spectrum of the photoconductivity induced by the polarization field of charges at surface states and traps in the film bulk has been analyzed to determine the energy band diagram at the c-Si-SiO x interface and the changes in the electronic states after the film annealing. It is found that the energy bands are ben…