Materials Literature
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OBJECTIVE: This study aims to investigate and compare the toxic effects of four types of metal oxide (ZnO, TiO(2), SiO(2,) and Al(2)O(3)) nanoparticles with similar primary size (∼20 nm) on human fetal lung fibroblasts (HFL1) in vitro. METHODS: The HFL1 cells were exposed to the nanoparticles, and toxic effects were a…
Polymer-coated gold nanoparticles (Au NPs) with controlled size and surface chemistry were successfully synthesized and applied to tailor the structures and properties of polytriphenylamine (PTPA) and polystyrene (PS) blends. Two different polymer-coated Au NPs with sizes of 5.9 nm (Au NP-1) and 20.7 nm (Au NP-2) were…
To protect carbon/carbon ( C/C ) composites against oxidation, a SiC nanowire‐toughened SiC coating with homogeneously dispersed nanowires within the coating was successfully prepared on C/C composites by a simple and low cost two‐step technique of chemical vapor deposition and pack cementation. The SiC nanowires effe…
The influence of the oxygen vacancies on the dielectric response of BaZr0.10Ti0.90O3 ceramics prepared by solid-state reaction and sintered at 1400 °C for 2 h was investigated. The as-sintered ceramic exhibits a giant relaxation with a shift of the transition temperature from ∼85 °C to above 170 °C in the frequency ra…
Although layer–by–layer (LbL) assembly technique has been successfully used in various areas of nanobiotechnology, some LbL-assembled nanostructures have suffered from a lack of stability when they are exposed to certain changes in aqueous environments. In addition, the interlayer diffusion of polyelectrolytes through…
The inhibition effect of Fig leaves extract on corrosion of mild steel in 2M acid solution was investigated using traditional weight loss measurements and various electrochemical techniques. Corrosion inhibition efficiency of Fig leaves extracts was evaluated using weight loss measurements for effect of various soluti…
Both twinning and detwinning have been reported to occur during the deformation of nanocrystalline (nc) face-centered-cubic metals. This raises the issue of how these two processes compete with each other. Here, we report that the twinning process dominates in a certain range of grain sizes, whereas, the detwinning pr…
BACKGROUND: Solid tumors need new blood vessels to feed and nourish them as well as to allow tumor cells to escape into the circulation and lodge in other organs, which is termed "angiogenesis." Some tumor cells within solid tumors can overexpress integrins α(v)β(3) and α(v)β(5), which can specifically recognize the p…
Detailed rheological studies of metallosupramolecular polymer films in the melt were performed to elucidate the influence of the metal ion and polymer components on their mechanical and structural properties. 4-Oxy-2,6-bis( N -methylbenzimidazolyl)pyridine telechelic end-capped polymers with a low- T g core, either po…
The forced water-oil displacement in capillary is a model that has important applications such as the groundwater remediation and the oil recovery. Whereas it is difficult for experimental studies to observe the displacement process in a capillary at nanoscale, the computational simulation is a unique approach in this…
To understand the characteristics of bone at the tissue level, the structure, organization and mechanical properties of the underlying levels down to the nanoscale as well as their mutual interactions need to be investigated. Such information would help understand changes in the bone properties including stiffness, st…
Excitation of the discrete (surface-wave/plasmon propagation mode) and continuous (radiation modes) spectrum by a point current source in the vicinity of graphene is examined. The graphene is represented by an infinitesimally thin, local, and isotropic two-sided conductivity surface. The dynamic electric field due to…
Zn(2)SnO(4) nanoparticles (NPs) with a narrow size distribution were synthesized by a simple hydrothermal route by controlling the crystallization process. The average size of NPs was 8 nm, and this was attributed to the formation of a hydroxy carbonate compound as an intermediate phase, which was demonstrated by the…
The thermal shock performances of two new tungsten grades with 1 and 5 wt% of tantalum were characterized with the electron beam facility JUDITH 1. As a reference material, ultra-high-purity tungsten (W-UHP) with a purity of 99.9999 wt% was used. The induced thermal shock crack networks and surface modifications were…
The transformation process of the natural kaolinite into metakaolinite for its use as a cement addition was very much known long time ago. However, environmental policies prioritize the waste recycling as raw material by its environmental benefits. This article reports, for the first time, the scientific aspects relat…
Phase change memory has long suffered from conflicting material properties between switching speed and thermal stability. This study explores the engineering of GeSbTe ternary alloys along an isoelectronic tie line and the Ge/Sb2Te3tie line with the hope of finding a high performance material. Our efforts resulted in…
A sample containing carbon nanoparticles was obtained starting with the soot generated during combustion of inexpensive paraffin oil in a flame. The complexity of the sample, however, required fractionation to isolate its components. Anion-exchange high-performance liquid chromatography (AE-HPLC) was used for the anal…
Mobile oxide ions: A remarkably high oxide ion conductivity at low temperatures has been found in an ordered δ-Bi2O3 superstructure with the composition Bi1−xVxO1.5+x (x=0.087 and 0.095), and attributed to a combination of highly polarizable sublattice with vacancies, central atoms able to support variable coordinatio…
Abstract Cerium oxide (CeO 2) nanoparticles have been used to modify properties of an epoxy matrix in order to improve the ultra-violet (UV) absorption property of epoxy thin films. The interdependence of mechanical properties, UV absorption property and the dispersed concentration of CeO 2 nanoparticles was investiga…
The effects of Fe(3)O(4), TiO(2) and carbon nanoparticles on the cucumber (Cucumis sativus) seed germination rate, root elongation and germination index were studied. The nanoparticles used ranged in average particle size from 30-50 nm, and their concentration ranged from 0 to 5000 μg/mL. Inhibitory effects were obser…