Materials Literature
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Abstract Depth profiles of the optical constants, carrier mobility, and carrier density of spin‐coated poly(3,4‐ethylene‐dioxythiophene):(polystyrene sulfonic acid) (PEDOT:PSS) films were investigated by real‐time spectroscopic ellipsometry (SE) characterization during argon plasma etching at atmospheric pressure. Spe…
A carbon black (CB) filler was inserted into polymethyl methacrylate (PMMA) using a chemical route method. The electrical conductivity and dielectric properties of PMMA/CB composites were investigated in a wide range of frequencies: from 100 Hz to 10 MHz. These films were irradiated with 140 MeV Ag11+ ions at a fluenc…
A study of Zn1−x Mn x O (x=0.02 and 0.04) pellets synthesized by sol–gel technique was performed to explore the inherent magnetic interactions. 50 MeV Li3+ ion beam irradiation was employed to a Zn0.96Mn0.04O pellet. Structural, morphological, compositional and magnetic properties of the samples were investigated. The…
Polymer structure modeling is a trend of recent material sciences. Developments of computational science and nanotechnology make it possible to predict properties of complicated molecular structures. Many theoretical and computational methods have succeeded in elucidating the nature of polymer structures. It is not al…
Increasing image quality in thin‐film transistor liquid crystal displays (TFT‐LCD) is a recognized challenge for electronic companies and specialists working in this area. One of the main problems in TFT‐LCDs is a phenomenon called “light leakage”, affecting black–white contrast and color brightness. It occurs because…
Tubular ternary nanostructures of tellurium were made through chemical transformations of tellurium nanowires (Te NWs). These transformations occur through reactions with CrO 3 and KMnO 4, two of the strongest oxidizing agents. In the case of CrO 3, the 1D structure of the NWs remained intact and the morphology change…
The influence of silver nanoparticles on the properties of polystyrene was investigated. The nanocomposites were prepared by a simple melting method, and composite films with different concentrations (i.e. 5, 10, and 15 wt%) of Ag nanoparticles were prepared by a casting method. The films were irradiated with 120 MeV…
The pressure variances in the reactor core and containment of a High Temperature Gas-cooled Reactor (HTGR) after a primary loop pressure boundary break accident determine the structural integrity and safety of the reactor. Based on mass conservation, energy conservation and state equations, explicit formulae for the t…
Among all the properties of metal oxide nanowires, their mechanical property is one of the most highly structure dependent and features strongly in many applications.The structural and mechanical phenomena and related mechanisms have attracted significant research interests.However, due to the difficulties in manipula…
The real (ɛ) and imaginary (ɛ″) parts of complex dielectric permittivity and ac conductivity (σac) of CdIn2S4 single crystals (cubic structure) have been measured in the frequency range f = 5 × 104 to 3.5 × 107 Hz. The results demonstrate that the dielectric dispersion in the crystals has a relaxation nature. In the f…
Fine-grain SiC-based ceramics have been produced via infiltration of molten silicon into preforms fabricated from SiC and graphite powders, with a phenol-formaldehyde resin as a binder. The materials thus prepared have a density of 2.70–3.15 g/cm 3 , dynamic modulus of elasticity from 200 to 400 GPa, compressive stren…
This research effort investigated the chemical heterojunction between magnetic nanoparticles coated with polyacrylic acid and multi-wall carbon nanotubes (MWCNTs). Here, magnetic nanoparticles were covalently attached to open-ended nanotubes in the presence of diclohexylcarbodiiimide. Initial evidence demonstrated tha…
OBJECTIVES: The aim of the present study was to evaluate calcium phosphate precipitation and the amount of precipitated protein on three potentially bioactive surfaces when adding laminin in simulated body fluid. MATERIAL AND METHODS: BLASTED TITANIUM DISCS WERE PREPARED BY THREE DIFFERENT TECHNIQUES CLAIMED TO PROVID…
Retinal degenerative diseases are a major cause of untreatable blindness. Stem cell therapy to replace lost photoreceptors represents a feasible future treatment. We previously demonstrated that postmitotic photoreceptor precursors expressing an NrlGFP transgene integrate into the diseased retina and restore some ligh…
Image blurring of MeV transmission electrons for gold nanoparticles on the top surface of micrometer-thick specimens has been investigated using the Monte Carlo simulation. Both the simulated line density profile and therefore image blurring were in good agreement with the experimental ones in the ultrahigh voltage el…
Nanoparticles that respond to various chemical and physical stimuli form the basis for various conceivable applications including sensors, chemical logic, biomedical imaging, and therapies. In this work, we demonstrate that the electrostatic and chemical (complexing and gold-thiol bonding) interactions existing in a g…
The hydrogen desorption properties of Li 2 BNH 6 were improved by doping with cobalt. With the addition of CoCl 2 (7 wt%), more than 8 wt% of hydrogen was released from Li 2 BNH 6 at temperatures below 210°C, which is approximately 90°C lower than that of pristine Li 2 BNH 6 . X-ray diffraction, Fourier transform-infr…
Zinc Selenide nanoparticles were synthesized by a microwave irradiation technique at 2.8 GHz using 7N purity Zn and Se powder in stoichiometric ratio as the starting materials. The crystal system and phase was confirmed by powder X-ray diffraction, the crystallite size was calculated using Scherer’s formula and found…
Thermolysis of CaBp(2)(THF)(2) (THF = tetrahydrofuran) at 190-200 °C and 0.05 Torr leads to a redistribution reaction to afford CaTp(2) (90%) and CaTp(BH(4)) (84%). Treatment of CaTp(BH(4)) with THF affords CaTp(BH(4))(THF)(2) and [CaTp(BH(4))(THF)](4), both of which were structurally characterized. Methanolysis or et…
In recent years, there is an increasing interest in the fabrication of inorganic–organic materials considering the remarkable change and improvement in properties. In this investigation, nanosized nickel oxide (NiO) particles were first prepared by calcination of nickel hydroxide precursor obtained by a simple liquid‐…