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.
Zhang
Fan
F
Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, USA.
Braun
Gary B
GB
Shi
Yifeng
Y
Zhang
Yichi
Y
Sun
Xiaohong
X
Reich
Norbert O
NO
Zhao
Dongyuan
D
Stucky
Galen
G
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