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<p>Several security solutions exist to reduce the risk of looting and theft of cultural artefacts, including systematic tagging to deter illicit trade. This study explores the integration of fluorescent nanoparticles with unique optical properties into ready-to-use conservation varnishes for archaeologists. Various nanomaterials (carbon dots, chalcogenides, and perovskite quantum dots) were incorporated into conservation resins to develop diverse tagging solutions compatible with archaeological artefacts. Their stability was assessed through accelerated aging by comparing their initial fluorescence brightness and its reduction after aging. Paraloid-based tags provided superior protection to alternative resins, while perovskite quantum dots exhibited instability under harsh conditions compared to other nanomaterials. Potential interferences with composition analysis were also evaluated by determining which tags could be detected using ED-XRF and WD-XRF. This study complements existing security tagging methods and may contribute to the broader adoption and improvement of traceable tagging solutions.</p>

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Fluorescent nanoparticles for security tags against the looting of archaeological artefacts

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年9月2日

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  • Théo Duarte De Assuncao,
  • Markus Helfert,
  • Valérie Thirion-Merle,
  • Sabine Fourrier,
  • Julien Proust,
  • Jérôme Plain

摘要

Several security solutions exist to reduce the risk of looting and theft of cultural artefacts, including systematic tagging to deter illicit trade. This study explores the integration of fluorescent nanoparticles with unique optical properties into ready-to-use conservation varnishes for archaeologists. Various nanomaterials (carbon dots, chalcogenides, and perovskite quantum dots) were incorporated into conservation resins to develop diverse tagging solutions compatible with archaeological artefacts. Their stability was assessed through accelerated aging by comparing their initial fluorescence brightness and its reduction after aging. Paraloid-based tags provided superior protection to alternative resins, while perovskite quantum dots exhibited instability under harsh conditions compared to other nanomaterials. Potential interferences with composition analysis were also evaluated by determining which tags could be detected using ED-XRF and WD-XRF. This study complements existing security tagging methods and may contribute to the broader adoption and improvement of traceable tagging solutions.