A Supraparticle-Based Five-Level-Identification Tag That Switches Information Upon Readout

Miller F, Wintzheimer S, Prieschl J, Strauss V, Mandel K (2020)

Publication Type: Journal article

Publication year: 2020

Journal

Advanced Optical Materials Wiley

DOI: 10.1002/adom.202001972

Abstract

Product identification tags are of great importance in a globalized world with increasingly complex trading routes and networks. Beyond currently used coding strategies, such as QR codes, higher data density, flexible application as well as miniaturization and readout indication are longed for in the next generation of security tags. In this work, micron-sized supraparticles (SPs) with encoded information (ID) are produced that not only exhibit multiple initially covert identification levels but are also irreversibly marked as “read” upon readout. To achieve this, lanthanide doped CaF2 nanoparticles are assembled in various quantity-weighted ratios via spray-drying in presence of a broad-spectrum stealth fluorophore (StFl), yielding covert spectrally encoded ID-SPs. Using these as pigments, QR codes, initially dominated by the green fluorescence of the StFl, could be generated. Upon thermal energy input, these particle-based tags irreversibly switch to an activated state revealing not only multiple luminescent colors but also spectral IDs. This strategy provides the next generation of material-based security tags with a high data density and security level that switch information upon readout and can be, therefore, used as seal of quality.

Authors with CRIS profile

Franziska Miller Professur für Anorganische Chemie Susanne Wintzheimer Professur für Anorganische Chemie Johannes Prieschl Professur für Anorganische Chemie Karl Mandel Professur für Anorganische Chemie

Involved external institutions

Max-Planck-Institut für Kolloid- und Grenzflächenforschung / Max Planck Institute of Colloids and Interfaces DE Germany (DE)

How to cite

APA:

Miller, F., Wintzheimer, S., Prieschl, J., Strauss, V., & Mandel, K. (2020). A Supraparticle-Based Five-Level-Identification Tag That Switches Information Upon Readout. Advanced Optical Materials. https://doi.org/10.1002/adom.202001972

MLA:

Miller, Franziska, et al. "A Supraparticle-Based Five-Level-Identification Tag That Switches Information Upon Readout." Advanced Optical Materials (2020).

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