Introduction: In the present study, we investigated the role of gold-silica shell-core nanoparticle in megavoltage irradiation of MCF7 breast cancer cells.   Materials and Methods: gold-silicon oxide shell-core nanoparticles (NPs) were obtained by conjugation of gold nanoparticle with amine or thiol functionalized silica nanoparticles (AuN@SiO2 and AuS@SiO...

Semiconductor devices with shallow junctions can be fabricated using plasma immersion ion implantation. In this technique BF3 gas has been used as the boron dopant source due to its low toxicity. Not only are ions implanted but, because of the fluorine ions, there is etching and deposition at the wafer surface. Therefore, the relationship between total dose and processing time is not straightfo...

Silica nanoparticles (SiO2 NPs) synthesized by the sol-gel approach were engineered for size and surface properties by grafting hydrophobic chains to prevent their aggregation and facilitate their contact with the phase boundary, thus improving their dispersibility in lubricant base oils. The surface modification was performed by covalent binding of long chain alkyl functionalities using lauric...

In this study, we investigated different metal pairings of Au nanoparticles (NPs) as potential catalysts for glycerol dehydration for the first time. All of the systems preferred the formation of hydroxyacetone (HYNE). Although the bimetallics that were tested, i.e., Au NPs supported on Ni, Fe and Cu appeared to be more active than the Au/SiO2 system, only Cu supported Au NPs gave high conversi...

Synthetic amorphous silica nanoparticles (SAS NPs) have been used in various industries, such as plastics, glass, paints, electronics, synthetic rubber, in pharmaceutical drug tablets, and a as food additive in many processed foods. There are few studies in the literature on NPs using gene mutation approaches in mammalian cells, which represents an important gap for genotoxic risk estimations. ...

This work on a compound polymer PMMA doped with some semi-metal oxides nanoparticles (SiO2, TiO2) NPs, intended to be utilized in corrective Contact Lenses. For this purpose the optical properties of (PMMA+2%SiO2, PMMA+2%TiO2, and PMMA+1%SiO2+1%TiO2) NPs were measured calculated get proper refractive indices dispersion (Abbe number) for these compounds design optimization.

Previous studies have reported crop toxicity of zinc oxide nanoparticles (ZnO-NPs) by root exposure and that silica (SiO2-NPs) modulate growth soil physicochemical properties. In this study, we determined the effects foliar to ZnO-NPs SiO2-NPs on metabolomic profile cucumber seedlings. Foliar spraying with improved plant performance, as indicated increases in chlorophyll contents, fluorescence ...

In this study, we showed for the first time that barium (Ba) codoping improves luminescent properties of terbium (Tb)-doped SiO2 nanoparticles (NPs). particular, quantum yield (QY) SiO2-Ba,Tb NPs was found to be ∼10.7%, whereas QY bare SiO2-Tb only ∼4.3%. Several mechanisms luminescence enhancement have been proposed. We strongly believe methodology can used create alternative silica-based with...

Metal oxide nanoparticles (NPs) are among the most highly produced nanomaterials, and have many diverse functions in catalysis, environmental remediation, as sensors, and in the production of personal care products. In this study, the toxicity of several widely used metal oxide NPs such as copper oxide, silica, titanium oxide and ferric oxide NPs, were evaluated In vitro. We exposed A549, H1650...