Helically Assembled Rare Earth Fluoride Nanoparticles with Multicolor Circularly Polarized Luminescence for High‐Security Anti‐Counterfeiting
Wen Yuan,
Shan Lu,
Xingjun Li,
Zhuo Li,
Xiaobo Gu,
Xingyang Liu,
Zhixiao Ren,
Fei Wang,
Xueyuan Chen
Affiliations
Wen Yuan
State Key Laboratory of Structural Chemistry and Fujian Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian China
Shan Lu
State Key Laboratory of Structural Chemistry and Fujian Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian China
Xingjun Li
State Key Laboratory of Structural Chemistry and Fujian Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian China
Zhuo Li
State Key Laboratory of Structural Chemistry and Fujian Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian China
Xiaobo Gu
State Key Laboratory of Structural Chemistry and Fujian Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian China
Xingyang Liu
State Key Laboratory of Structural Chemistry and Fujian Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian China
Zhixiao Ren
State Key Laboratory of Structural Chemistry and Fujian Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian China
Fei Wang
State Key Laboratory of Structural Chemistry and Fujian Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian China
Xueyuan Chen
State Key Laboratory of Structural Chemistry and Fujian Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian China
ABSTRACT Multicolor circularly polarized luminescence (CPL) materials show considerable potential in the field of advanced anti‐counterfeiting. However, it remains challenging to achieve stable inorganic materials with multicolor CPL. In this work, for the first time, chiroptical rare earth (RE) fluoride nanoparticles induced by helical silica are obtained through a facile in situ assembly strategy. The influence of assembly ratio and morphological structure on the luminescence dissymmetry factor (glum) has been systematically investigated, leading to an optimized glum value of 4.7 × 10−3. By adjusting the types and concentrations of RE dopants (Ce3+, Tb3+, Eu3+), the nanocomposites exhibit multicolor CPL and time‐resolved photoluminescence characteristics. Remarkably, these nanocomposites retain their CPL activity even after calcination at 400°C. Leveraging the visible multicolor emissions, along with the hidden dynamic and chiroptical signals, the nanocomposites are successfully applied in high‐security anti‐counterfeiting patterns and multilevel optical encryption codes.
