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https://hdl.handle.net/2440/110160
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dc.contributor.author | Zhang, J. | - |
dc.contributor.author | Riesen, N. | - |
dc.contributor.author | Riesen, H. | - |
dc.date.issued | 2017 | - |
dc.identifier.citation | Nanoscale, 2017; 9(41):15958-15966 | - |
dc.identifier.issn | 2040-3364 | - |
dc.identifier.issn | 2040-3372 | - |
dc.identifier.uri | http://hdl.handle.net/2440/110160 | - |
dc.description.abstract | We report a novel method for detecting ionizing radiation by employing the phenomenon of upconversion luminescence. Nanocrystalline SrFCl:Yb³⁺/Er³⁺ was prepared by ball-milling and characterized by powder X-ray diffraction (XRD), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). The photoluminescence properties of nanocrystalline SrFCl:Yb³⁺, SrFCl:Er³⁺ and SrFCl:Yb³⁺/Er³⁺ before and after X-irradiation were investigated. The results demonstrate that both Yb³⁺ and Er³⁺ ions in the SrFCl host are reduced to their divalent state upon X-ray exposure. Under 980 nm infrared excitation, SrFCl:Yb³⁺/Er³⁺ nanocrystals displayed efficient upconversion luminescence. The upconversion luminescence intensity gradually decreased with increasing X-irradiation in a double exponential fashion with rate constants of k₁ = 0.08 Gy⁻¹ and k₂ = 0.01 Gy⁻¹. In comparison with other X-ray storage phosphors, the present system shows a much higher stability of stored information since it is not subject to photobleaching in the read-out process. This is the first report on detecting ionizing radiation by upconversion luminescence, with the potential for improved read-out performance over traditional storage phosphors. Possible applications of the present phosphor include bioimaging and in vivo cell-level X-ray dose monitoring. | - |
dc.description.statementofresponsibility | Jun Zhang, Nicolas Riesen and Hans Riesen | - |
dc.language.iso | en | - |
dc.publisher | Royal Society of Chemistry | - |
dc.rights | This journal is © The Royal Society of Chemistry 2017 | - |
dc.source.uri | http://dx.doi.org/10.1039/c7nr05108e | - |
dc.title | Mechanochemically prepared SrFCl nanophosphor co-doped with Yb³⁺ and Er³⁺ for detecting ionizing radiation by upconversion luminescence | - |
dc.title.alternative | Mechanochemically prepared SrFCl nanophosphor co-doped with Yb(3+) and Er(3+) for detecting ionizing radiation by upconversion luminescence | - |
dc.type | Journal article | - |
dc.identifier.doi | 10.1039/c7nr05108e | - |
pubs.publication-status | Published | - |
dc.identifier.orcid | Riesen, N. [0000-0002-6803-0666] | - |
Appears in Collections: | Aurora harvest 8 IPAS publications |
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