Al 2 O 3 nanoparticles synthesized using various oxidizing agents: Defluoridation performance

Upconversion spectroscopy of Al 2 O 3 : Er 3 +

The spectroscopic properties of Al2O3:Er thin films have been investigated by lifetime measurements. The luminescence decay curves show an initial non-exponential component, followed by an exponential tail, whose decay time decreases with increasing Er concentration. This behavior can be described with good accuracy by a microscopic treatment that takes into account both energy migration and en...

Ternary System Al 2 O 3 – MgO – CaO : Part II , Phase Relationships in the Subsystem Al 2 O 3 – MgAl 2 O 4 – CaAl 4 O 7

Solid-state compatibility and melting relationships in the subsystem Al2O3–MgAl2O4–CaAl4O7 were studied by firing and quenching selected samples located in the isopletal section (CaOzMgO)–Al2O3. The samples then were examined using X-ray diffractomtery, optical microscopy, and scanning and transmission electron microscopies with wavelengthand energy-dispersive spectroscopies, respectively. The ...

ZnO, TiO(2), SiO(2,) and Al(2)O(3) nanoparticles-induced toxic effects on human fetal lung fibroblasts.

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 analyzed by using MTT assay, cellular morphology observation and Hoechst 33 258...

Investigating the Effect of Various Oxidizing Agents on the Surface Functionalization of Microporous Polypropylene Membranes

Size evolution of ion beam synthesized Pb nanoparticles in Al

The size evolution of Pb nanoparticles (NPs) synthesized by ion implantation in an epitaxial Al film has been experimentally investigated. The average radius R of Pb NPs was determined as a function of implantation fluence f. The R(f) data were analyzed using various growth models. Our observations suggest that the size evolution of Pb NPs is controlled by the diffusion-limited growth kinetics ...