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Riesen N, Priest C, Lancaster DG, Badek K, Riesen H. Ultra-high-resolution greyscale fluorescence images via UV-exposure of thin flexible phosphor films. NANOSCALE 2023; 15:4863-4869. [PMID: 36728632 DOI: 10.1039/d2nr02931f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Thin films of BaFCl:Sm nanocrystals prepared using a polymer binder were used to create fluorescence images. The phosphor films were exposed to a UV-C mercury lamp light source via chromium-coated quartz greyscale masks to create 4 μm resolution greyscale fluorescence images. The mechanism relies on the highly efficient conversion of Sm3+ to Sm2+ ions upon exposure to UV-C light which displays a large linear dynamic range. The red fluorescence around 688 nm of the Sm2+ is then read-out using blue-violet illumination under a laser scanning confocal microscope. The greyscale images with 16 greyscale levels had a resolution equivalent to ∼125 line pairs per mm or ∼6400 dpi. Improvements in the resolution would be possible using collimated UV-C laser exposure of the film or the use of higher resolution photomasks. Ultra-high resolution binary fluorescence images were also created with resolutions down to 2 μm (∼250 line pairs per mm, ∼12 700 dpi). Downstream applications of the technology could include tailored covert or overt anti-counterfeiting labelling.
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Affiliation(s)
- Nicolas Riesen
- University of South Australia, STEM, Future Industries Institute, Mawson Lakes, SA 5095, Australia.
- Institute for Photonics and Advanced Sensing (IPAS) and School of Physical Sciences, The University of Adelaide, SA 5005, Australia
| | - Craig Priest
- University of South Australia, STEM, Future Industries Institute, Mawson Lakes, SA 5095, Australia.
| | - David G Lancaster
- University of South Australia, STEM, Future Industries Institute, Mawson Lakes, SA 5095, Australia.
| | - Kate Badek
- School of Science, The University of New South Wales, Canberra, ACT 2600, Australia
| | - Hans Riesen
- School of Science, The University of New South Wales, Canberra, ACT 2600, Australia
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Lamiri L, Kahouadji B, Berd M, Abdellatif A, Benchallal L, Guerbous L, Ouhenia S, Souici A, Amiour L, Zoukel A, Samah M. Structural, morphological and photoluminescence characterizations of Sm3+ doped Y2O3 nano-sized phosphors synthesized by ultrasound assisted sol gel method. J RARE EARTH 2022. [DOI: 10.1016/j.jre.2022.03.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Amarasinghe DK, Dissanayake KT, Dhanapala BD, Rabuffetti FA. Local atomic environment of Yb 3+ in alkaline-earth fluorohalide nanocrystals. CrystEngComm 2022. [DOI: 10.1039/d2ce00636g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The local atomic environment of Yb3+ ions doped into alkaline-earth fluorohalide nanocrystals was probed using Yb L2 edge EXAFS spectroscopy. Two structural models are proposed for the first coordination shell of Yb3+.
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Shih HR, Chang YS. Structure and Photoluminescence Properties of Sm 3+ Ion-Doped YInGe₂O₇ Phosphor. MATERIALS 2017; 10:ma10070779. [PMID: 28773139 PMCID: PMC5551822 DOI: 10.3390/ma10070779] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Revised: 06/30/2017] [Accepted: 07/04/2017] [Indexed: 11/16/2022]
Abstract
A new phosphor, Sm3+ ion-doped YInGe2O7, was synthesized using a planetary ball mill solid state reaction. The XRD patterns show that all of the peaks can be attributed to the monoclinic YInGe2O7 crystal structure when the Sm3+ ion concentration is increased up to 20 mol %. Under an excitation wavelength of 404 nm, the Sm3+ intra-4f transition appears in the emission spectrum including two stronger emission peaks located at 560–570 nm and 598 nm correspond to the 4G5/2 → 6H5/2 and 4G5/2 → 6H7/2 transitions, respectively, and another weak emission peak located at 645 nm is due to the 4G5/2 → 6H9/2 transition. The decay time decreases from 4.5 to 0.8 ms as Sm3+ ion concentrations increase from 1 to 20 mol %, and the decay mechanism of the 4G5/2 → 6H7/2 transition is a single decay component between Sm3+ ions only. The concentration quenching effect occurs when the Sm3+ ion concentration is higher than 3 mol %. The CIE color coordinate of Y0.97Sm0.03InGe2O7 phosphor is at x = 0.457 and y = 0.407, which is located in the orange-yellow light region.
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Affiliation(s)
- Hung-Rung Shih
- Department of Mechanical and Computer-Aided Engineering, National Formosa University, Huwei, Yunlin 632, Taiwan.
| | - Yee-Shin Chang
- Department of Electronic Engineering, National Formosa University, Huwei, Yunlin 632, Taiwan.
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A novel orange emitting Sm3+ ions doped NaCaAlPO4F3 phosphor: Optical and luminescence properties. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2016.10.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Zhang J, Riesen H. Controlled Generation of Tm2+ Ions in Nanocrystalline BaFCl:Tm3+ by X-ray Irradiation. J Phys Chem A 2017; 121:803-809. [DOI: 10.1021/acs.jpca.6b12035] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jun Zhang
- School of Physical, Environmental
and Mathematical Sciences, The University of New South Wales, Canberra, ACT 2600, Australia
| | - Hans Riesen
- School of Physical, Environmental
and Mathematical Sciences, The University of New South Wales, Canberra, ACT 2600, Australia
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LIN L, LIN H, WANG Z, ZHENG B, CHEN J, XU S, FENG Z, ZHENG Z. Luminescence properties of alkali metal ions sensitized CaFCl:Tb3+ nanophosphors. J RARE EARTH 2015. [DOI: 10.1016/s1002-0721(14)60521-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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8
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Wang X, Riesen H, Stevens-Kalceff MA, Rajan RP. Room Temperature Hole-Burning of X-ray Induced Sm2+ in Nanocrystalline Ba0.5Sr0.5FCl0.5Br0.5:Sm3+ Prepared by Mechanochemistry. J Phys Chem A 2014; 118:9445-50. [DOI: 10.1021/jp507401y] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xianglei Wang
- School
of Physical, Environmental and Mathematical Sciences, The University of New South Wales, Canberra, Australian Capital Territory 2600, Australia
| | - Hans Riesen
- School
of Physical, Environmental and Mathematical Sciences, The University of New South Wales, Canberra, Australian Capital Territory 2600, Australia
| | - Marion A. Stevens-Kalceff
- School
of Physics and Electron Microscope Unit, Mark Wainwright Analytical
Centre, The University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Rajitha Papakutty Rajan
- School
of Physical, Environmental and Mathematical Sciences, The University of New South Wales, Canberra, Australian Capital Territory 2600, Australia
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Wang XL, Liu ZQ, Stevens-Kalceff MA, Riesen H. Mechanochemical Preparation of Nanocrystalline BaFCl Doped with Samarium in the 2+ Oxidation State. Inorg Chem 2014; 53:8839-41. [DOI: 10.1021/ic500712b] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Xiang-lei Wang
- School of Physical, Environmental and Mathematical
Sciences, The University of New South Wales, ADFA, Canberra, Australian Capital Territory 2600, Australia
| | - Zhi-qiang Liu
- School of Physical, Environmental and Mathematical
Sciences, The University of New South Wales, ADFA, Canberra, Australian Capital Territory 2600, Australia
| | - Marion A. Stevens-Kalceff
- School of Physics and Electron Microscope
Unit, Mark Wainwright Analytical Centre, The University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Hans Riesen
- School of Physical, Environmental and Mathematical
Sciences, The University of New South Wales, ADFA, Canberra, Australian Capital Territory 2600, Australia
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Liu Z, Stevens-Kalceff MA, Wang X, Riesen H. Mechanochemical synthesis of nanocrystalline BaFCl:Sm3+ storage phosphor by ball milling. Chem Phys Lett 2013. [DOI: 10.1016/j.cplett.2013.10.024] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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