Materials Literature
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Carbon nanoparticles, with their high biocompatibility and low toxicity, have recently been considered for biomedical applications, including antiangiogenic therapy. Critical to normal development and tumor formation, angiogenesis is the process of forming capillary blood vessels from preexisting vessels. In the prese…
We study the vortex dynamics in a high-quality FeTe 0.6 Se 0.4 single crystal by performing magnetization measurements of the screening current density J s and flux creep rate S . The temperature dependence of S shows a plateau in the intermediate-temperature region with a high creep rate ∼ 0.03, which is interpreted…
The magnetocaloric effect (MCE) achieved for La 0.7 Sr 0.3 MnO 3 /Ta 2 O 5 composites has been investigated. The maximum value of magnetic entropy change of La 0.7 Sr 0.3 MnO 3 composites is found to decrease slightly with the further increasing of Ta 2 O 5 concentration. It is shown that La 0.7 Sr 0.3 MnO 3 /Ta 2 O 5…
Graphene has been regarded as the next-generation carbon nanofiller for polymer nanocomposites. Owing to its superior physical properties, it produces a dramatic improvement in properties of polymers at very low filler loadings. In the past few years, toughening of polymers by graphene has been studied intensively. Th…
Abstract According to the analysis of the current state of the knowledge shows that there is little information on the process of phase transformations that occur during the cooling Cu-Al-Fe-Ni hypo-eutectoid bronzes with additions of Cr, Mo and/or W, made additions individually or together, for the determination of:…
Calcium carbonate nano-particles were synthesized by a reverse micro-emulsion method at room temperature with Tween® 80 and Span® 80 as co-surfactants. The nano-particles synthesized were surface modified by stearic acid. An important operating variable in the Span 80-Tween 80/toluene/water reverse micro-emulsion syst…
ZnO thin films with Cd/Zn nominal ratios of 0%, 1%, 3%, 5%, and 7% and thickness of 0.7 μm were prepared by chemical spray pyrolysis. X-ray diffraction patterns showed that the films have polycrystalline structures and peaks matching the hexagonal ZnO structure. Crystallite sizes ranged from about 35 nm to 87 nm. As t…
Dynamic failure of brittle materials is a fundamental physical problem that has significantly impacts to many science and engineering disciplines. As the first and the most important step towards the full understanding of this problem, one has to observe dynamic damage accumulation in brittle solids. In this work, we…
The spreading dynamics of a drop deposited on a superhydrophilic micropillar array are qualitatively different from those on a smooth surface in that a thin fringe layer rapidly wicks into microstructures while the bulk collapses in the center. Here we experimentally measure the temporal evolution of the shapes of wat…
The key findings in the synthesis and transformation of silver nanoparticles with pentagonal symmetries arising from regular multiple twinning are reported, researched in the last 5 years. In a one‐stage photochemical synthesis of silver decahedral (pentagonal bipyramid, J 13 solid) nanoparticles (AgDeNPs), oxidative…
We report on room temperature diode characteristics of ZnO:Al (AZO)/Si heterostructures by current-voltage measurements. In this study, with increasing AZO film thickness, systematic reduction in the turn-on potential (from 3.16 to 1.80 V) and the film stress are observed. Complementary capacitance-voltage studies rev…
The complex phase diagrams of strongly correlated oxides arise from the coupling between physical and electronic structure. This can lead to a renormalization of the phase boundaries when considering thin films rather than bulk crystals due to reduced dimensionality and epitaxial strain. The well-established bulk RNiO…
Nanosilver (nAg) is a considerably important nanomaterial due to its unique physical and chemical features and its intrinsic antimicrobial properties. Thus far, nAg has been widely applied in a variety of fields including biomedicine. Considering the safety and adverse influence, investigations into the biological fat…
To investigate the possibility of removing titanium dioxide nanoparticles (TiO2 NPs) from water by coagulation, as well as to find the optimal coagulant and experimental conditions for TiO2 NP removal, four types of coagulant were adopted: polyferric sulfate (PFS), ferric chloride (FeCl3), polyaluminum chloride (PACl)…
A cupric oxide (CuO) nanocrystal-doped NaCl single crystal and a pure NaCl single crystal are grown by using the Czochralski (Cz) method. A number of techniques, including X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray (EDX) analysis, Fourier transform infrared (FT-IR) spectroscop…
BACKGROUND: The extensive use of different nanoparticles has raised great concerns about their occupational and biological safety. OBJECTIVE: The aim of this study was to evaluate the cytotoxic effect of zinc oxide nanoparticles (ZnO NPs) on viability of spermatozoa. MATERIALS AND METHODS: Semen samples were obtained…
The recent development of synthesis processes to assemble graphene sheets into porous three-dimensional (3D) macroscopic structures are reviewed, including our efforts on 3D graphene structures. Mechanisms for building 3D graphene architectures and their composite materials are also summarized. The functional systems…
Seaweed extracts of Sargassum cinereum was used as a reducing agent in the eco-friendly extracellular synthesis of silver nanoparticles from an aqueous solution of silver nitrate (AgNO3). High conversion of silver ions to silver nanoparticles was achieved with a reaction temperature of 100(°) and a seaweed extract con…
The influence of grain size on the tensile deformation and ductility for Mg–1.02% Zn (wt.%) alloy was investigated. The uniform elongation is nearly insensitive to the increase of grain size, but the post-uniform elongation is significantly decreased with increasing grain size. The high ductility in the fine-grained s…
BACKGROUND: Predictive modeling of the biological effects of nanomaterials is critical for industry and policymakers to assess the potential hazards resulting from the application of engineered nanomaterials. METHODS: We generated an experimental dataset on the toxic effects experienced by embryonic zebrafish due to e…