A microemulsion preparation of nanoparticles of europium in silica with luminescence enhancement using silver.
A facile one-pot microemulsion method has been developed for the synthesis of spherical silver core-silica shell (Ag@SiO2) nanoparticles with europium chelates doped in the shell through a silane agent. The method is significantly more straightforward than other extant methods. Measurements of the luminescent emissions from the Ag@SiO2 nanoparticles, in comparison with control silica nanoparticles without silver cores, showed that the presence of the silver cores can increase the fluorescence intensity approximately 24-fold and decrease the luminescence lifetime. This enhancement offers a potential increase in overall particle detectability with increased fluorophore photostability.
Department of Mechanical and Aeronautical Engineering, University of California Davis, CA 95616, USA.
Zhi Ya
ZY
Ma
Dosi
D
Dosev
Ian M
IM
Kennedy
D003460:Crystallization / Q000379:methods*; D004655:Emulsions / Q000737:chemistry; D005063:Europium / Q000737:chemistry*; D008163:Luminescent Measurements / Q000379:methods*; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D036103:Nanotechnology / Q000379:methods; D010316:Particle Size; D012822:Silicon Dioxide / Q000737:chemistry*; D012834:Silver / Q000737:chemistry*; D013499:Surface Properties
D004655:Emulsions; D046911:Macromolecular Substances; D012834:Silver; D005063:Europium; D012822:Silicon Dioxide