in this study, undoped zno and doped with fe and mn nanostructures were synthesized by hydrothermal method. the morphology of nanostructures was characterized by scanning electron microscope. the electrochemical response of the carbon paste electrode modified with nanoparticles of zno and also zno doped with fe and mn toward levodopa (l-dopa) was studied. studies of cyclic voltammetry using pro...

The photocatalytic performance of new TiO2/CeO2 composites is reported and the mechanism for its enhancement with respect to bare TiO2 CeO2 nanoparticles revealed. With a two- step process, shells were deposited on hollow cores forming (TiO2@H-CeO2). tuning shell deposition, optical properties engineered. absorption range was extended visible light lifetime photo-induced electron-hole pairs pro...

Rare earth metal doped silica nanoparticles have significant advantages over traditional organic dyes and quantum dots. Silsesquioxanes are promising precursors in the production of silica nanoparticles by thermolysis, due to their structural similarities with silica materials. This manuscript describes the production of a new Eu3+-based metallasilsesquioxane species and its use as a single sou...

The biocompatible surface modification of metal oxide nanoparticles via surface functionalization technique has been used as an important tool in nanotechnology and medicine. In this report, we have prepared aqueous dispersible, trivalent metal ion (samarium)-doped cerium oxide nanoparticles (SmCNPs) as model redox altered CNPs of biological relevance. SmCNP surface modified with hydrophilic bi...

Here, we report the preparation of Ce(3+) and Tb(3+) co-doped sodium yttrium fluoride nanorods and NaYF(4):Ce(3+)/Tb(3+) core-shell nanoparticles by the emulsion method. The core-shell nanoparticles are confirmed by X-ray diffraction study and transmission electron microscopy (TEM) analysis. The hexagonal crystal phase of Ce(3+)-doped sodium yttrium fluoride nanocrystals is converted to the cub...

Nowadays engineered nanomaterials (ENM) are widely used in different customer products that lead to their released into the environment. The ENM behavior in aquatic system is influenced by many factors including water chemistry, presence of natural colloids, biota etc. Despite intensive research conducted in this area the fate of ENM in aquatic system isn’t clearly understood that poses the thr...

Growing interest in the development of a hydrogen economy means that CO oxidation is increasingly important for upgrading H2-rich fuel gas streams cells. CeO2-supported catalysts are most promising candidates catalytic because their high activity. In present work, DFT+U calculations were performed to investigate stability and reactivity Ptn (n = 1?4) clusters supported on CeO2(111) (Pt/CeO2) Pt...

Today, the antiviral activity of oxide nanomaterials can be used in fight against viral disease COVID-19. It is thought that Ag nanoparticles may bind to surface glycoprotein virus and interfere with virus’s interaction epithelial cells, inhibit reproduction by releasing silver ions cell. The viruses’ inhibition RNA (ribonucleic acid) DNA (deoxyribonucleic genomes nanocomposites action was pres...

objective(s): first-principles calculations have been carried out to investigate the interaction of aspirin molecule with nitrogen-doped tio2 anatase nanoparticles using the density functional theory method in order to fully exploit the biosensing capabilities of tio2 particles. methods: for this purpose, we have mainly studied the adsorption of the aspirin molecule on the fivefold coordinated ...

Normal micelle microemulsion method was utilized for fabrication of organically modified silica (ORMOSIL) nanoparticles. The void and dye-doped nanoparticles were synthesized in nonpolar core of two different surfactants including Aerosol OT and Tween 80. The nanoparticles were characterized using transmission electron microscopy, dynamic light scattering, and zeta potential analysis. Our resul...