Yuan Xiangyang, Cui Endian, Liu Kai, Artizzu Flavia, Liao Xiaoling, Zhao Juntao, Tang Jianfeng, Sun Wei, Liu Jing, Liu Yingshuai
Key Laboratory of Luminescence Analysis and Molecular Sensing, Ministry of Education, School of Materials and Energy, Southwest University, Chongqing, 400715, China.
College of Materials Science and Engineering, Chongqing Jiaotong University, Chongqing 400074, China.
J Colloid Interface Sci. 2023 Jul;641:961-971. doi: 10.1016/j.jcis.2023.03.125. Epub 2023 Mar 22.
Lanthanide (Ln) luminescent materials play a crucial role in information security and data storage owing to their excellent and unique optical properties. The advances in dynamic colorful luminescent anti-counterfeiting nanomaterials enable the generation of a high-level information encryption. In this work, a superior thermal, optical wavelength and excitation power triple-mode stimuli-responsive emission color modulation is demonstrated in a lanthanide-doped nanostructured luminescent material. The plentiful emission colors are manipulated by modulating the composition of a fluoride core-shell nanostructure with different Ln at different doping concentrations. The nanomaterials display remarkable excitation wavelength/power-dependent color change, along with temperature-dependent color variation in the range from 298 K to 437 K, with a good relative sensitivity S of 1.1387% K at 398 K. The universal optical modulation, combined with the excellent optical and structural stability of the luminescent nanoparticles, renders many advantages for the anti-counterfeiting application. This work explores a universal strategy for the manipulation of triple-mode stimuli-responsive dynamic luminescence and demonstrates its good potential for anti-counterfeiting application.
镧系（Ln）发光材料因其优异独特的光学性质，在信息安全和数据存储中发挥着至关重要的作用。动态彩色发光防伪纳米材料的进展使得能够实现高级别的信息加密。在这项工作中，在一种镧系掺杂的纳米结构发光材料中展示了卓越的热、光学波长和激发功率三模式刺激响应发射颜色调制。通过在不同掺杂浓度下用不同的镧系元素调制氟化物核壳纳米结构的组成来操控丰富的发射颜色。这些纳米材料表现出显著的激发波长/功率依赖性颜色变化，以及在298 K至437 K范围内的温度依赖性颜色变化，在398 K时具有1.1387% K的良好相对灵敏度S。这种通用的光学调制，结合发光纳米颗粒优异的光学和结构稳定性，为防伪应用带来了诸多优势。这项工作探索了一种操控三模式刺激响应动态发光的通用策略，并展示了其在防伪应用中的良好潜力。
