Journal
CHEMISTRY-AN ASIAN JOURNAL
Volume 9, Issue 2, Pages 447-451Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/asia.201301281
Keywords
bismuth fluoride; hydrophilic; lanthanides; nanoparticles; upconversion
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Funding
- Department of Science and Technology (DST), India [SR/S1/IC-46/2010]
- IISER-Kolkata
- UGC, India
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Heavy metal fluorides like BiF3 as a host for lanthanide ions are of interest as bismuth is the only heavy metal that is nontoxic. In this work, we report the synthesis of highly water-dispersible ultrasmall BiF3 nanoparticles about 6nm in size within a poly(vinyl pyrrolidone) matrix by a hydrothermal method. Microscopy analysis reveals that the nanoparticles are well separated and confined within the polymer network. These nanoparticles were found to be excellent hosts for lanthanide (Ln(3+)) ions. Through suitable Ln(3+) doping, BiF3 exhibits strong emissions in the visible region upon both UV and near infrared (NIR) excitations. The non-toxicity of both bismuth and PVP can be advantageous for the potential use of BiF3 nanoparticles in drug delivery and bioimaging.
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