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Covert Information Storage and Encryption Using Temporal Emissions from Lanthanide-Doped LiYF4 Nanoparticles

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Download Hi-Res ImageDownload to MS-PowerPointCite This:ACS Appl. Nano Mater. 2023, 6, 23, 21496-21502
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    Covert Information Storage and Encryption Using Temporal Emissions from Lanthanide-Doped LiYF4 Nanoparticles
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    ACS Applied Nano Materials

    Cite this: ACS Appl. Nano Mater. 2023, 6, 23, 21496–21502
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    https://doi.org/10.1021/acsanm.3c05134
    Published November 27, 2023
    Copyright © 2023 American Chemical Society
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    Abstract

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    The long-lived excited state lifetimes from lanthanide ions add a temporal dimension to the two spatial dimensions used in printed information storage devices. A system using lanthanide-doped LiYF4 nanoparticles was designed, where a pattern and mask emit in the same region of the visible spectrum but with different lifetimes. After excitation has ceased, the emission from the mask decays, allowing the pattern to be imaged. A pattern employing Eu3+-doped nanoparticles was masked using CsMnCl3 nanoparticles, and a pattern using LiYF4:Yb3+, Ho3+ upconverting nanoparticles was masked using LiYF4:Yb3+, Er3+ nanoparticles. This demonstrates a method to enhance the encryption capacity of information storage devices that rely on lanthanide luminescence.

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    • Experimental methods, energy level diagrams, powder X-ray diffraction patterns and unit cell diagrams of LiYF4: Ln3+ and CsMnCl3, chromaticity diagrams, TEM images and spectroscopy of x% Ho3+ and varying size of LiYF4 nanoparticles, TEM images and spectroscopy of x% Er3+ and x% Yb3+ of LiYF4 nanoparticles, scheme illustrating the pattern printing method, LiYF4 unit cell calculations, and digital photograph processing (PDF)

    • Video S1: UV-sensitized print under real-time and slow motion (MP4)

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    ACS Applied Nano Materials

    Cite this: ACS Appl. Nano Mater. 2023, 6, 23, 21496–21502
    Click to copy citationCitation copied!
    https://doi.org/10.1021/acsanm.3c05134
    Published November 27, 2023
    Copyright © 2023 American Chemical Society
    Request reuse permissions

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