TiO2-SiO2 core-shell particles include of monodisperse silica core and nanostructured titania shell were synthesized by a multi-step coating process. The monodisperse silica spheres were synthesized by Stöber method and titania shell was obtained of a colloidal sol prepared by a hydrolysis–condensation reaction. The titania sol was deposited on monodisperse silica spheres by a multi-step coatin...

double emulsion solvent evaporation technique is one of the most attractive methods used to prepare micro and nanoparticles in pharmaceutical areas of interest, but because of the effects of many formulation factors on the size and release behavior of the fabricated particles, optimization of the formulation factors is needed. in this study various parameters including technical and composition...

Noble metal nanoparticles exhibit localized plasmon resonance modes that span the visible and near-infrared spectral ranges have many applications. Modifying size, shape, composition of changes number their properties. The characteristics these are transiently affected when illuminating nano-objects with ultrashort laser pulses. Here, we synthesize core-shell gold-silver nanocuboids measure sig...

A series of oxidative treatments PdIn-supported intermetallic nanoparticles at different temperatures were performed. The bulk and surface structure catalyst during phase transformation was investigated by bulk- surface-sensitive techniques (in situ XAFS, DRIFTS adsorbed CO). It found that comparison palladium indium fractions in on the suggests formation a «core-shell» structure. According to ...

The luminescence efficiency of lanthanide-doped upconversion nanoparticles is of particular importance for their embodiment in biophotonic and photonic applications. Here, we show that the upconversion luminescence of typically used NaYF₄:Yb3+30%/Tm3+0.5% nanoparticles can be enhanced by ~240 times through a hierarchical active core/active shell/inert shell (NaYF₄:Yb3+30%/Tm3+0.5%)/NaYbF₄/NaYF₄...

Two sets of core/shell magnetic nanoparticles, CoFe2O4/Fe3O4 and Fe3O4/CoFe2O4, with a fixed diameter of the core (~ 4.1 and ~ 6.3 nm for the former and latter sets, respectively) and thickness of shells up to 2.5 nm were synthesized from metal chlorides in a diethylene glycol solution. The nanoparticles were characterized by X-ray diffraction, transmission electron microscopy, and magnetic mea...

Bimetallic Ag/Au core/shell nano-particles (NPs) have been prepared via the chemical reduction in aqueous solution, with use of seed growth approach. Silver nanoparticles were synthesis as seeds, utilized nucleating agent for anisotropic related to gold colloids. The different volume seeds has added solution that contains chloride, Nanoparticles begin grow. average size 30 nm and spherical shap...