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。
Effects of treatment using ammonia plasma on poly(lactic acid) (PLA), poly(ethylene terephthalate) (PET), and liquid-crystal polymer (LCP) were investigated to elucidate differences related to polymer structures and the mode of introduction of nitrogen functional groups onto the polyester surfaces. Nitrogen functional…
FTIR spectroscopy technique has been applied for the analysis of high energy heavy ion irradiated kapton-H polyimide. The kapton-H samples were irradiated with 75 MeV oxygen, 80 MeV nickel and 50 MeV lithium ions at PELLETRON facility, Nuclear Science Centre, New Delhi. A very broad peak in 2500-3500 cm -1 is due to t…
In the present contribution, ultrafine fibers were spun from poly(vinyl alcohol) (PVA)/water solution using a homemade electrospinning set-up. The effects of the concentration of polymer solution, spinning voltage and collection distance between the tip to target on the morphological appearance and average diameter of…
Epitaxial magnetite (Fe3O4) thin films were deposited by molecular beam epitaxy using molecular oxygen as the oxidant. Films deposited on (001) SrTiO3, (001) MgO, and (001) BaTiO3 surfaces are epitaxial with the film (001) parallel to the substrate (001) and the film ⟨100⟩ parallel to the substrate ⟨100⟩. X-ray magnet…
Polypropylene (PP) nanocomposites consisting of E-glass are manufactured by the process of pultrusion. Thermal and mechanical characterization of nanocomposite has been performed and compared with that of traditional microcomposites. In addition, the nanocomposite is characterized by means of optical micrographs (OPM)…
Materials exhibiting an antimicrobial effect are especially advantageous for medical textiles which are in very close and long-term contact with human skin. Orthopaedic stockings made of terry cotton and polyamide were coated with silver nanoparticles by a simple dip coating process under mild conditions. Both textile…
The authors fabricated diodes of Au, Al, Ni, Pt, Pd, Mo, Ta, and Ir on single crystal ZnO(0001¯) surfaces from different vendors and measured their Schottky barriers, idealities, and reverse currents on as-received and remote oxygen (20% O2∕80%He) plasma-treated surfaces. Using low temperature nanoscale depth-resolved…
The structural, dielectric, magnetic, and magnetodielectric properties were systematically investigated for (1−x)BaTiO3−(x)LaMnO3 composites in wide temperatures, frequencies, and mole percent (x). Dielectric anomaly around 410 K and magnetic hysteresis at 293 K were clearly observed, which might imply the coexistence…
Study about properties of nanotubes with medicinal and electronic applications have been made the highly useful and effective results for applications in different areas of science. One of the main recognized structures of nanotubes is (5,5) single wall tube (SWCN). Graph theory is an area of mathematics that is close…
Under high DC voltages polymeric insulators tend to accumulate space charge, leading to a deviation from the designed electric field for the system. Consequently local fields may reach high enough values to cause ageing and eventual failure. A particularly dangerous instance is the appearance of heterocharge at one or…
This article details the design, construction, and operation of flexible system that modulates light exposure for the purpose of fabricating continuous and discrete gradient combinatorial libraries. Designed for versatility, the device combines "off the shelf" components, modular accessories, and flexible computer con…
Polymer through-hole membranes were fabricated by nanoimprinting using metal molds with high aspect ratios, which were prepared by a replication process using an anodic porous alumina template. The introduction of a two-layer structure of polymers and the selective removal of underlying polymer layer allows the format…
Recently, several cases of maloperation of the differential protection with second harmonic blocking due to transformer switching on with load have been reported. Quite a few maloperation occurred at the nonrestraint region of percentage restraint plane. The previous theory cannot be utilized directly to analyze this…
X-ray diffraction, Brillouin, and Raman scattering measurements were performed on Al3+ and H+- bearing stishovite at ambient conditions. Samples with different Al3+ and H+ contents were used to examine the effects of these minor constituents on the density, acoustic velocities, single-crystal and aggregate elastic mod…
Chemical and electrical processes developing at the semiconductor-electrolyte interface under conditions of anodic polarization were analyzed. It was shown that dense chemisorption coatings are formed on the surface of III–V crystals at voltages of pore formation onset, and a degenerate inversion layer is formed on th…
Sepiolite is a hydrated magnesium silicate with a fibrous structure. It undergoes acid‐base interactions around the natural pH of 8.5. The zeta potential (zp) of sepiolite depends on the type, the chemical, and the mineralogical composition of sepiolite and more importantly the ionic environment of the suspensions. In…
The phenomenon of optical anisotropy in porous semiconductors and dielectrics (porous silicon, gallium phosphide, and alumina) and photonic crystal structures formed on their basis is reviewed. It is shown that anisotropic nanostructuring of initially isotropic media leads to the occurrence of strong birefringence. Ap…
Magnetostructural transformation and the associated magnetic entropy change were investigated in Ni-rich ferromagnetic Heusler alloys. A direct transformation from the ferromagnetic martensite phase to the paramagnetic austenite phase was observed in selected Ni54.8Mn20.3Ga24.9 and Ni55Mn18.9Ga26.1 two-alloy compositi…
The preparation and phase transitional properties of several optically active non‐symmetrical dimers are reported. Two types of dimeric mesogens formed by covalently combining pro‐mesogenic cholesterol with either phenyl 4‐cyanobenzoate (polar) or phenyl trans‐4‐pentylcyclohexanecarboxylate (apolar) cores in an end‐to…
The thermal degradation behavior of poly(3-hydroxybutyrate) (PHB) and poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (P(HB-co-HHx), HHx=12 mol%) has been studied under different environmental conditions by thermogravimetric analysis (TGA) Fourier transform infrared (FT-IR) spectroscopy. It is reported that at higher te…