Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/18814
Title: Bi-functional NaLuF4:Gd3+/Yb3+/Tm3+ nanocrystals : structure controlled synthesis, near-infrared upconversion emission and tunable magnetic properties
Authors: Zeng, S
Xiao, J
Yang, Q
Hao, J 
Issue Date: 2012
Publisher: Royal Society of Chemistry
Source: Journal of materials chemistry, 2012, v. 22, no. 19, p. 9870-9874 How to cite?
Journal: Journal of materials chemistry 
Abstract: In this paper, fluorescent and magnetic bi-functional NaLuF4:Ln (Ln = Gd3+, Yb3+, Tm3+) nanocrystals were synthesized via a simple hydrothermal method using oleic acid as capping ligand. The crystal phase, size, upconversion (UC) properties, and magnetization of the nanocrystals can be readily modified by doping with Gd3+. The results reveal that Gd3+ addition can promote the transformation from the cubic to the hexagonal phase and reduce the size. In addition, NaLuF4:Ln (Ln Gd3+, Yb3+, Tm3+) nanocrystals present efficient near infrared (NIR) to NIR emission, which is beneficial for in vivo biomedical applications due to the increased penetration depth and low radiation damage of NIR light in bio-tissues. More importantly, owing to the large magnetic moment of Gd3+, the Gd3+-doped NaLuF4 nanocrystals also present excellent paramagnetic properties at room temperature. Therefore, it is expected that these nanocrystals can be used as promising dual-modal nanoprobes for optical bioimaging and magnetic resonance imaging (MRI), and may have potential applications in bioseparation.
URI: http://hdl.handle.net/10397/18814
ISSN: 0959-9428
EISSN: 1364-5501
DOI: 10.1039/c2jm31196h
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