Reversible Photochromism and Multicolor Luminescence Modulation for X‐Ray Detection and Secure Information Encryption

IF 18.5 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Advanced Functional Materials Pub Date : 2025-07-22 DOI:10.1002/adfm.202506583

Xue Bai, Jiayan Liao, Bibo Lou, Yueteng Zhang, Heping Zhao, Yingzhu Zi, Yuewei Li, Wilson Tang, Gabrielle A. Mandl, Anjun Huang, Zhiguo Song, Jianbei Qiu, Philip A. Gale, John A. Capobianco, Chonggeng Ma, Zhengwen Yang

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引用次数: 0

Abstract

Conventional X‐ray‐responsive materials face significant limitations including instability, complex processing, low resolution, or single‐mode signaling, which hinder advanced X‐ray detection, imaging, and anti‐counteferting. Addressing these challenges, a comprehensive investigation is conducted on multifunctional Eu3+‐doped Gd2SiO5, a material that combines photochromism with radioluminescence and photoluminescence. Through experimental and theoretical analyses, the reversible X‐ray‐induced photochromism (arising from oxygen vacancy‐related color centers) and tunable multicolor emission (from self‐trapped exciton states and Eu3+ transitions) are revealed. These mechanisms enable dual‐mode, linear optical responses to X‐ray dose via dynamic absorption and emission modulation. The optimized phosphor achieves high light yield (47041 photons MeV−1), high spatial resolution, and stability under harsh conditions. Integration into flexible PDMS films facilitates high‐resolution X‐ray imaging devices. Critically, by leveraging intrinsic multicolor luminescence, a prototype of selective information encryption using optical filters and decryption via RGB color channel separation is demonstrated. These findings highlight the versatility of Gd2SiO5:Eu3+ phosphors and their potential to drive innovations in next‐generation X‐ray imaging, sensing, and security technologies.

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用于X射线检测和安全信息加密的可逆光致变色和多色发光调制

传统的X射线响应材料面临着显著的局限性，包括不稳定性、复杂的处理、低分辨率或单模信号，这些都阻碍了先进的X射线检测、成像和抗抵消。针对这些挑战，研究人员对Eu3+掺杂的多功能Gd2SiO5进行了全面的研究，这是一种结合了光致变色、辐射发光和光致发光的材料。通过实验和理论分析，揭示了可逆的X射线诱导光致变色（由氧空位相关的色中心引起）和可调的多色发射（由自捕获激子态和Eu3+跃迁引起）。这些机制通过动态吸收和发射调制实现对X射线剂量的双模线性光学响应。优化后的荧光粉具有高产光率（47041光子MeV−1）、高空间分辨率和恶劣条件下的稳定性。集成到柔性PDMS薄膜便于高分辨率X射线成像设备。关键是，通过利用固有的多色发光，展示了使用光学滤波器和通过RGB颜色通道分离解密的选择性信息加密的原型。这些发现突出了Gd2SiO5:Eu3+荧光粉的多功能性，以及它们在推动下一代X射线成像、传感和安全技术创新方面的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Advanced Functional Materials 工程技术-材料科学：综合

CiteScore

29.50

自引率

4.20%

发文量

2086

审稿时长

2.1 months

期刊介绍： Firmly established as a top-tier materials science journal, Advanced Functional Materials reports breakthrough research in all aspects of materials science, including nanotechnology, chemistry, physics, and biology every week. Advanced Functional Materials is known for its rapid and fair peer review, quality content, and high impact, making it the first choice of the international materials science community.