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https://hdl.handle.net/2440/131783
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Type: | Journal article |
Title: | Yb³⁺ and Er³⁺ codoped BaLiF₃ nanocrystals for X-ray dosimetry and imaging by upconversion luminescence |
Other Titles: | Yb(3+) and Er(3+) codoped BaLiF(3) nanocrystals for X-ray dosimetry and imaging by upconversion luminescence |
Author: | Chowdhury, N. Riesen, N. Riesen, H. |
Citation: | ACS Applied Nano Material, 2021; 4(7):6659-6667 |
Publisher: | American Chemical Society |
Issue Date: | 2021 |
ISSN: | 2574-0970 2574-0970 |
Statement of Responsibility: | Nishita Chowdhury, Nicolas Riesen, and Hans Riesen |
Abstract: | We report on the potential of BaLiF₃ as a host matrix for the upconversion sensitizer (Yb³⁺)-activator (Er³⁺) pairs as prepared by ball milling. Specifically, the infrared (980 nm)-excited upconversion luminescence (UCL) of BaLiF₃:Yb³⁺, Er³⁺ samples before and after annealing in air is reported, and it is demonstrated that the upconversion efficiency is enhanced by ∼2 orders of magnitude via a postannealing treatment. The UCL of BaLiF₃:Yb³⁺, Er³⁺ compared favorably with that of the efficient NaYF₄:Yb³⁺, Er³⁺ UCL nanophosphors. In addition, the X-ray storage capability of BaLiF₃:Yb³⁺, Er³⁺ was explored. It was observed that the photoluminescence intensities of Yb³⁺ (∼980 nm) and Er³⁺ (∼650 nm) ions decrease gradually with cumulative X-ray doses due to X-ray-induced reduction of Yb³⁺ to Yb²⁺ and Er³⁺ to Er²⁺, and as a result, the upconversion luminescence decreases. The Yb²⁺ photoluminescence spectrum upon X-irradiation was observed at 480 nm in accord with earlier reports for the BaLiF₃ host. In a unique development, 2D X-ray imaging based on the UCL signal is reported for the first time. These results demonstrate the X-ray recording capability of mechanochemically synthesized BaLiF₃:Yb³⁺, Er³⁺ nanocrystals and point to possible applications in combining X-ray dosimetry and bioimaging. |
Keywords: | Upconversion luminescence; photoluminescence; dosimetry; nanocrystals; X-ray imaging; computed radiography; inverse perovskites |
Rights: | © 2021 American Chemical Society |
DOI: | 10.1021/acsanm.1c00600 |
Grant ID: | http://purl.org/au-research/grants/arc/IH150100028 |
Published version: | http://dx.doi.org/10.1021/acsanm.1c00600 |
Appears in Collections: | Aurora harvest 8 IPAS publications |
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