کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1528743 | 1511984 | 2014 | 4 صفحه PDF | دانلود رایگان |
• New magnetic/fluorescent nanoparticles were synthesized.
• The silver core led to a maximum 4-fold enhanced fluorescence of fluorophore.
• Maximum enhancement factor was obtained when metal-fluorophore distance is 5 nm.
• Magnetism and fluorescence appeared simultaneously for nanoparticles in solution.
Nanoparticles composed of a silver core coated with a silica shell (Ag@SiO2) were prepared. A dye, fluorescein isothiocyanate (FITC), was further encapsulated during the growth of a second silica shell onto Ag@SiO2 nanoparticles. The proximity of silver nanoparticles led to a 4-fold maximal enhancement in the fluorescence of FITC when the first silica shell thickness was set at 5 nm. After amino-functionalization of Ag@SiO2-FITC nanoparticles, iron oxide nanoparticles were bonded to their surface. The magnetic and metal-enhanced fluorescence properties appeared simultaneously when Ag@SiO2-FITC-Fe3O4 hybrid nanoparticles were dispersed in a solution.
Journal: Materials Science and Engineering: B - Volume 182, March 2014, Pages 92–95