Tuning sub-10 nm single-phase NaMnF3 nanocrystals as ultrasensitive hosts for pure intense fluorescence and excellent T1 magnetic resonance imaging

Yan Zhang; Jing Dong Lin; Vimalan Vijayaragavan; Kishore K. Bhakoo; Timothy Thatt Yang Tan

doi:10.1039/C2CC34858F

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Chemical Communications

Issue 83, 2012

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Tuning sub-10 nm single-phase NaMnF₃ nanocrystals as ultrasensitive hosts for pure intense fluorescence and excellent T₁ magnetic resonance imaging

Yan Zhang,^a Jing Dong Lin,^a Vimalan Vijayaragavan,^b Kishore K. Bhakoo^b and Timothy Thatt Yang Tan*^a

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School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459
E-mail: tytan@ntu.edu.sg ;
Fax: +65 6794 7553 ;
Tel: +65 6316 8829

Translational Molecular Imaging Group, Singapore Bioimaging Consortium (A*Star), 11 Biopolis Way, Singapore 138667

Chem. Commun., 2012,48, 10322-10324

DOI: 10.1039/C2CC34858F
Received 07 Jul 2012, Accepted 20 Aug 2012
First published online 21 Aug 2012

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We report ultrasensitive sub-10 nm NaMnF₃ nanocrystals codoped with Yb³⁺, Er³⁺/Tm³⁺ ions, and their intense pure red and near-infrared upconversion emissions in the presence of Mn²⁺. The nanocrystals showed excellent T₁ contrast in 7 T MRI, implying their potential as single-phase contrast agents for fluorescent deep tissue and MR imaging.

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Yan Zhang
Jing Dong Lin
Vimalan Vijayaragavan
Kishore K. Bhakoo
Timothy Thatt Yang Tan

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Tuning sub-10 nm single-phase NaMnF₃ nanocrystals as ultrasensitive hosts for pure intense fluorescence and excellent T₁ magnetic resonance imaging

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Tuning sub-10 nm single-phase NaMnF₃ nanocrystals as ultrasensitive hosts for pure intense fluorescence and excellent T₁ magnetic resonance imaging