

FOLLOWUS
a.School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
b.Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, China
c.Guangdong Provincial Laboratory of Chemistry and Fine Chemical Engineering Jieyang Center, Jieyang 515200, China
lushlin@gdut.edu.cn (S.L.L.)
fengdch@gdut.edu.cn (D.C.F.)
yangyuzh@gdut.edu.cn (Y.Z.Y.)
Received:18 June 2025,
Accepted:05 August 2025,
Online First:16 October 2025,
Published:05 November 2025
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Xu, L. R.; Wang, J. Y.; Huang, J. T.; He, Q. Y.; Lu, S. L.; Feng, D. C.; Ma, Z. T.; Yuan, Z. K.; Yang, Y. Z.; Chen, X. D. Multi-mode polarized luminescent Au-nanorod polymer composites for advanced optical anti-counterfeiting. Chinese J. Polym. Sci. 2025, 43, 2118–2127
Li-Rong Xu, Jia-Yong Wang, Jin-Ting Huang, et al. Multi-mode Polarized Luminescent Au-nanorod Polymer Composites for Advanced Optical Anti-counterfeiting[J]. Chinese Journal of Polymer Science, 2025, 43(11): 2118-2127.
Xu, L. R.; Wang, J. Y.; Huang, J. T.; He, Q. Y.; Lu, S. L.; Feng, D. C.; Ma, Z. T.; Yuan, Z. K.; Yang, Y. Z.; Chen, X. D. Multi-mode polarized luminescent Au-nanorod polymer composites for advanced optical anti-counterfeiting. Chinese J. Polym. Sci. 2025, 43, 2118–2127 DOI: 10.1007/s10118-025-3428-1.
Li-Rong Xu, Jia-Yong Wang, Jin-Ting Huang, et al. Multi-mode Polarized Luminescent Au-nanorod Polymer Composites for Advanced Optical Anti-counterfeiting[J]. Chinese Journal of Polymer Science, 2025, 43(11): 2118-2127. DOI: 10.1007/s10118-025-3428-1.
This work presents a multi-mode luminescent Au-nanorod hydrogel composite with polarization tunability
triple emission (fuorescence/TADF/phosphorescence)
and reversible patterning via stretching
UV lithography
and imprinting. It enables dynamic optical encryption and anti-counterfeiting with self-healing capability.
The development of organic afterglow materials with high environmental stability and multi-mode luminescence remains a significant challenge in luminescent anti-counterfeiting. In this work
an organic luminescent molecule was encapsulated within polyacrylamide microspheres and embedded in a gold nanorod-doped
ferric ion-crosslinked hydrogel exhibiting upper critical solution temperature behavior. The obtained composites exhibited fluorescence
thermally activated delayed fluorescence
and phosphorescence. Through the application of extrusion or uniaxial stretching
the orientation of the gold nanorods was modulated
enabling polarization-dependent luminescence through transverse surface plasmon resonance absorption. At 300% uniaxial strain
the polarized fluorescence intensity difference at 520 nm reached 0.29. Furthermore
ultraviolet irradiation was employed to locally disrupt the orientation of the gold nanorods
resulting in depolarization within the irradiated regions. These areas displayed non-polarized fluorescence
while the non-irradiated regions retained both emission and fluorescence polarization characteristics. Localized imprinting was employed to modulate material thickness
thereby controlling the density of gold nanorods. Thinner regions exhibited weaker transverse localized surface plasmon resonance absorption
while thicker regions showed stronger absorption
enabling the coexistence of blue–green fluorescence and polarization patterns. Local humidification effectively reduced phosphorescence intensity
enhancing the material’s environmental responsiveness. The composite demonstrated excellent reversibility over multiple stretching–self-healing cycles and pattern-switching processes
highlighting its strong potential for multidimensional optical encryption and intelligent anti-counterfeiting applications.
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