Synthesis of NaYF4 and NaLuF4 Based Upconversion Nanocrystals and Comparison of Their Properties.
In this study, four kinds of upconversion nanocrystals (UCNs) have been successfully synthesized by a facile solvothermal method. The morphology, crystalline phase, composition, grain size, upconversion luminescence and cell image of the UCNs were investigated. The properties of the NaLuF4-based UCNs were compared with the counterparts of NaYF4-based UCNs. It is found that the NaLuF4-based UCNs are apt to form hexagonal phase structures, while NaYF4-based UCNs of NaYF4:Yb, Er and NaYF4:Gd, Yb, Er are cubic and hexagonal phases respectively. The upconversion emission intensities of the NaLuF4-based UCNs are higher than that of NaYF4-based UCNs, and Gd3+ presented UCNs are higher than that of Gd3+ absented UCNs. The bioimaging application of NaLuF4:Gd, Yb, Er shows that bright upconversion luminescence can be observed when UCNs-labeled HeLa cells are excited with 980 nm light.
Juan
J
Ouyang
Dongguang
D
Yin
Kailin
K
Song
Chengcheng
C
Wang
Bing
B
Liu
Minghong
M
Wu
D002462:Cell Membrane / Q000737:chemistry / Q000378:metabolism; D002470:Cell Survival / Q000187:drug effects; D005459:Fluorides / Q000737:chemistry* / Q000493:pharmacokinetics / Q000633:toxicity; D006367:HeLa Cells; D006801:Humans; D049408:Luminescent Agents / Q000737:chemistry / Q000493:pharmacokinetics / Q000633:toxicity; D008187:Lutetium / Q000737:chemistry* / Q000493:pharmacokinetics / Q000633:toxicity; D053758:Nanoparticles / Q000737:chemistry* / Q000633:toxicity; D036103:Nanotechnology / Q000379:methods*; D015019:Yttrium / Q000737:chemistry* / Q000493:pharmacokinetics / Q000633:toxicity
D049408:Luminescent Agents; C525362:sodium yttriumtetrafluoride; D015019:Yttrium; D008187:Lutetium; D005459:Fluorides