Materials Literature
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BACKGROUND: The influence of nanoparticles on the immune system is poorly understood. It was recently shown that exposure to a mixture of nanodiamond (ND)- and nanoplatinum (NP)-coated material (DPV576-C) activates murine T-cells. This study examined the role of a dispersed aqueous mixture of ND/NP (DPV576) in activat…
The shape memory deformation in single crystals of Ni 49 Fe 27 Ga 18 Co 6 alloy under uniaxial compression conditions has been studied. It was found that samples in the martensite state deformed in the [110] and [100] directions exhibit strongly anisotropic properties. Despite virtually equal residual strain and the w…
We have studied the electrical resistivity, magnetization, and heat capacity of the off-stoichiometric Heusler alloys Ni50Mn35In15 and Ni50Mn34.5In15.5 as functions of temperature and magnetic field. The results show that the alloy system is more sensitive to the composition than what is apparent from the established…
This study presents a simple yet effective hydrothermal route for selective generation of (Gd1-xEux)2O3 (x=0.03-0.13) redphosphor nanorods and nanotubes. Detailed characterizations of the products were achieved by combined means of XRD, FT-IR, TGA/DSC, BET, FE-SEM, HR-TEM, PL/PLE, fluorescence decay analysis, and tran…
Abstract We report an effective method for bulk obtaining exfoliated graphene oxide (GO) solids from their aqueous solutions, which were prepared from nature graphite by an oxidation method. Tyndall effect proved that GO solution has a colloidal nature. Different flocculants were used to coagulate GO colloidal, and it…
One important factor affecting crevice corrosion of passive metals is the crevice geometry, e.g., the gap of the crevice. The crevice geometry can be affected by the properties of the materials used as the crevice formers, i.e., a polymeric crevice former can conform to the surface roughness of a metal specimen, which…
The anticorrosion performances of new non-toxic inhibitors based on carboxylic acids extracted from vegetable oil have been evaluated for the protection of iron artefacts. Electrochemical measurements and natural aging tests have demonstrated the efficiency of those inhibitors in the context of temporary treatments. S…
We reported optical properties of a-plane ZnO/ZnMgO multiple quantum wells (MQWs) structure grown by the pulse laser deposition system. The emission peak energy of a-plane ZnO/ZnMgO MQWs kept invariant in the power-dependent photoluminescence (PL) measurement, indicating the nonpolar characteristics due to the lack of…
Abstract The structure of hibonite from Myanmar (space group P 6 3 / mmc , Z = 2, at room temperature a = 5.5909(1), c = 21.9893(4) Å), with simplified formula CaAl 12 O 19 and composition (Ca 0.99 Na 0.01 ) Σ1.00 was investigated between temperatures of 100 K and 923 K by single-crystal X-ray diffraction methods. Str…
This paper presents the development of a micromachined high-frequency linear array using PZT piezoelectric thick films. The linear array has 32 elements with an element width of 24 μm and an element length of 4 mm. Array elements were fabricated by deep reactive ion etching of PZT thick films, which were prepared from…
The microstructural and electrical-property changes of undoped and 5.4% nitrogen-doped Ge 2 Sb 2 Te 5 were investigated. The transition temperature of sheet resistance increased owing to nitrogen doping, which corresponded well with the observed phase-change states. The lattice parameters of the undoped and nitrogen-d…
Treeing in polyethylene based nanocomposite samples as well as unfilled polyethylene samples were studied using 50Hz ac voltage. The tree inception voltage was observed for different types of samples. The tree initiation time as well as the tree growth patterns at a fixed ac voltage have also been studied. The results…
Model nanocomposites on the basis of specially synthesized amorphous and semicrystalline polyimide matrices, silicate (natural and synthetic) and carbon nanoparticles with different morphology (tubes, platelets, discs, and spheres) have been developed. The influence of nanoparticle morphology on the rheological behavi…
Non-Debye relaxation in superionic AgI–Ag2O–SeO2 glasses has been investigated as a function of frequency and temperature. The experimental data have been analyzed in the framework of complex dielectric permittivity and complex electric modulus formalisms. The dielectric permittivity data have been well interpreted us…
The effect of modifying additives based on detonation nanodiamonds on the tribological characteristics of polyurethane rubber is studied. Introduction of modifying additives based on detonation nanodiamonds (0.5 wt %) leads to a marked improvement in the antifriction and wear-resistance characteristics under condition…
An A1-doped ZnO/p-Si heterojunction is fabricated by a laser molecular beam epitaxy technique. The abnormally high ideality factors (n ≫ 2) of the prepared heterojunction are observed in the interim bias voltage range. A theoretical model is proposed to understand the much higher ideality factor of the special heteroj…
The effects of a novel nano-ZnO coated PVC film on physicochemical quality and microbiological changes of fresh-cut ‘Fuji’ apple were evaluated. Fruit decay were efficiently reduced in nano-packing samples. The content of ascorbic acid and total phenolic dropped to 0.2 g•kg-1, 1.2 g•kg-1 in nano-packing samples and 0.…
A promising new concept of a diamond-amplified photocathode for generation of high-current, high-brightness, and low thermal emittance electron beams was recently proposed and is currently under active development. Detailed understanding of physical processes with multiple energy and time scales is required to design…
The present work is based on previous research on the one-dimensional (1D) analysis of the hydrogen diffusion process, and proposes a numerical approach of the same phenomenon in two-dimensional (2D) situations, e.g. notches. The weighted residual method was used to solve numerically the differential equations set out…
The band gap energy was estimated experimentally by measuring the change in optical absorption intensity as a function of photon energy in a wide range from visible to vacuum-ultraviolet wavelengths for commercially available 11 kinds of insulating polymers. The absorption spectra as a function of photon energy measur…