Fabrication of Ag@SiO(2)@Y(2)O(3):Er nanostructures for bioimaging: tuning of the upconversion fluorescence with silver nanoparticles.
We demonstrated that the nanostructures comprising silver cores and dense layers of Y(2)O(3):Er separated by a silica shell are an excellent model system to study the interaction between upconversion materials and metals in nanoscale. This architecture allows for versatile control of the Y(2)O(3):Er-metal interaction through control of the silica dielectric spacer thickness and the metal-core size. Finally, the nanoparticles are potentially interesting as fluorescent labels in, for instance (single particle), imaging experiments or bioassays which require low background or tissue penetrating wavelengths.
Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, USA.
Fan
F
Zhang
Gary B
GB
Braun
Yifeng
Y
Shi
Yichi
Y
Zhang
Xiaohong
X
Sun
Norbert O
NO
Reich
Dongyuan
D
Zhao
Galen
G
Stucky
D045744:Cell Line, Tumor; D005063:Europium / Q000737:chemistry*; D005453:Fluorescence; D005456:Fluorescent Dyes / Q000138:chemical synthesis / Q000737:chemistry / Q000493:pharmacokinetics*; D006801:Humans; D008163:Luminescent Measurements; D008297:Male; D008422:Materials Testing; D057054:Molecular Imaging / Q000379:methods*; D049329:Nanostructures / Q000737:chemistry*; D010316:Particle Size; D011471:Prostatic Neoplasms / Q000175:diagnosis; D012822:Silicon Dioxide / Q000737:chemistry*; D012834:Silver / Q000737:chemistry*; D013499:Surface Properties; D014018:Tissue Distribution; D015019:Yttrium / Q000737:chemistry*
D005456:Fluorescent Dyes; D012834:Silver; D005063:Europium; D015019:Yttrium; D012822:Silicon Dioxide; C091417:yttria