We have developed structure/toxicity relationships for amorphous silica nanoparticles (NPs) synthesized through low-temperature colloidal (e.g., Stöber silica) or high-temperature pyrolysis (e.g., fumed silica) routes. Through combined spectroscopic and physical analyses, we have determined the state of aggregation, hydroxyl concentration, relative proportion of strained and unstrained siloxane...

In this paper, we investigated the functional imaging properties of magnetic microspheres composed of magnetic core and CdTe quantum dots in the silica shell functionalized with folic acid (FA). The preparation procedure included the preparation of chitosan-coated Fe3O4 nanoparticles (CS-coated Fe3O4 NPs) prepared by a one-pot solvothermal method, the reaction between carboxylic and amino group...

The preparation of Ru nanoparticles supported on γ-Al2O3 followed by chemical reduction using RuCl3 as a precursor is demonstrated, and their properties are compared to prepared impregnation with Ru3(CO)12 subsequent thermal decomposition. resulting from slightly larger (1.2 vs. 0.8 nm). In addition, were deposited Stöber SiO2 both deposition techniques. These particles than the ones (2.5 3.4 n...

Advances in biomedical research have increased interest obtaining and studying new bifunctional materials for use theragnostic. Here we describe detail the preparation of magnetic-fluorescent (Y0.9Ln0.1VO4/Fe3O4)@SiO2 [(Y0.9Ln0.1VO4 @SiO2)/Fe3O4)@SiO2] nanocomposites with Ln = Er or Tm. In addition, their magnetic optical properties were carefully analyzed. The influence Fe3O4 content silica sh...

Abstract Poor high-temperature stability (HTS) and weak microwave absorption performance (MAP) are a major restriction for wave-absorbing materials in elevated temperature ambient. Consequently, the Stöber process sol–gel method first devised used to create multi-core/shell SiO 2 @Al O 3 nanostructures (MCSNs) on Ti AlC (TAC). The MCSNs with thickness of 135–215 nm raise starting oxidation matr...

Abstract This work reports the preparation, characterization, and a drug release study of mesoporous silica nanoparticles (MNPSiO 2 ) functionalized with folic acid (FA) loaded Cis-Pt as targeted system to kill glioblastoma cancer cells. The MNPSiO were synthesized by Stöber method using hexadecyltrimethylammonium bromide templating agent, which was finally removed calcination at 550°C. chemica...