Dopant-controlled synthesis of water-soluble hexagonal NaYF4 nanorods with efficient upconversion fluorescence for multicolor bioimaging

A novel strategy is proposed to directly synthesize water-soluble hexagonal NaYF 4 nanorods by doping rare-earth ions with large ionic radius (such as La 3+ , Ce 3+ , Pr 3+ , Nd 3+ , Sm 3+ , Eu 3+ , and Gd 3+ ), and the dopantcontrolled growth mechanism is studied. Based on the doping effect, we fab...

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Bibliographic Details
Published inNano research Vol. 3; no. 1; pp. 51 - 60
Main Authors Yu, Xuefeng, Li, Min, Xie, Mengyin, Chen, Liangdong, Li, Yan, Wang, Ququan
Format Journal Article
LanguageEnglish
Published Heidelberg Tsinghua Press 2010
Subjects
Atomic/Molecular Structure and Spectra
Biomedicine
Biotechnology
Chemistry and Materials Science
Condensed Matter Physics
Materials Science
Nanotechnology
Research Article
Crystal growth
fluorescence
nanocrystals
hexagonal NaYF
bioimaging
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Summary:A novel strategy is proposed to directly synthesize water-soluble hexagonal NaYF 4 nanorods by doping rare-earth ions with large ionic radius (such as La 3+ , Ce 3+ , Pr 3+ , Nd 3+ , Sm 3+ , Eu 3+ , and Gd 3+ ), and the dopantcontrolled growth mechanism is studied. Based on the doping effect, we fabricated water-soluble hexagonal NaYF 4 :(Yb,Er)/La and NaYF 4 :(Yb,Er)/Ce nanorods, which exhibited much brighter upconversion fluorescence than the corresponding cubic forms. The sizes of the nanorods can be adjusted over a broad range by changing the dopant concentration and reaction time. Furthermore, we successfully demonstrated a novel depth-sensitive multicolor bioimaging for in vivo use by employing the as-synthesized NaYF 4 :(Yb,Er)/La nanorods as probes.
ISSN:1998-0124
1998-0000
DOI:10.1007/s12274-010-1008-2