Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 18, Issue 30, Pages 9239-9245Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201201053
Keywords
doping; fluorescent probes; hydrothermal synthesis; imaging agents; nanoparticles
Categories
Funding
- 973 programs [2012CB932504, 2011CB933403]
- National Natural Science Foundation of China [21001108, 21101158, 21177128]
Ask authors/readers for more resources
Under 980 nm near-infrared (NIR) excitation, upconversion luminescent (UCL) emission of GdF3:Yb,Er upconversion nanoparticles (UCNPs) synthesized by a simple and green hydrothermal process can be tuned from yellow to red by varying the concentration of dopant Li+ ions. A possible mechanism for enhanced red upconverted radiation is proposed. A layer of silica was coated onto the surface of GdF3:Yb,Er,Li UCNPs to improve their biocompatibility. The silica-coated GdF3:Yb,Er,Li UCNPs show great advantages in cell labeling and in vivo optical imaging. Moreover, GdF3 UCNPs also exhibited a positive contrast effect in T1-weighted magnetic resonance imaging (MRI). These results suggest that the GdF3 UCNPs could act as dual-modality biolabels for optical imaging and MRI.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available