Dual-modal fluorescent/magnetic bioprobes based on small sized upconversion nanoparticles of amine-functionalized BaGdF 5:Yb/Er

Songjun Zeng, Ming Kiu Tsang, Chi Fai Chan, Ka-Leung WONG, Bin Fei, Jianhua Hao*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

87 Citations (Scopus)

Abstract

A new type of BaGdF 5:Yb/Er nanoprobe for dual-modal fluorescent and magnetic resonance imaging (MRI) is demonstrated. Water soluble and amine-functionalized BaGdF 5:Yb/Er nanoparticles (NPs) with average size of about 10 nm were synthesized by a facile one-pot hydrothermal method. The in vitro up-converted emission of BaGdF 5:Yb/Er NPs is observed in HeLa cells with near-infrared excitation at 980 nm and served as a fluorescent label. In addition, the cytotoxicity assay in HeLa cells shows low cell toxicity of the amine-functionalized BaGdF 5:Yb/Er NPs. Moreover, these BaGdF 5 NPs exhibit excellent intrinsic paramagnetic properties and enhanced T 1-weighted MRI images with increased concentrations of BaGdF 5 NPs. Therefore, these results suggest that the amine-functionalized BaGdF 5 NPs with an optimized size and low cell toxicity are promising dual-modal bioprobes for optical bioimaging and MRI.

Original languageEnglish
Pages (from-to)5118-5124
Number of pages7
JournalNanoscale
Volume4
Issue number16
DOIs
Publication statusPublished - 21 Aug 2012

Scopus Subject Areas

  • Materials Science(all)

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