Dual-band high-dissymmetry circularly polarized luminescence from cholesteric liquid crystals overlaid a gold cluster film

Xichen Hao, Zhenda Chen, Huizhen Ma, Yuhan Wang, Yaxian Cao, Buyi Yao, Ruotong Wang, Rui Cao, Yin Xiao, Changlong Liu, Ying Liu, Shouzhong Feng, Haitao Dai (), Xiao-Dong Zhang () and Yan-Jun Liu ()
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Xichen Hao: Tianjin University
Zhenda Chen: Tianjin University
Huizhen Ma: Tianjin University
Yuhan Wang: Tianjin University
Yaxian Cao: Tianjin University
Buyi Yao: Tianjin University
Ruotong Wang: Tianjin University
Rui Cao: Tianjin University
Yin Xiao: Tianjin University
Changlong Liu: Tianjin University
Ying Liu: Tianjin University
Shouzhong Feng: Anhui Zhongyi New Material Science and Technology Co. Ltd
Haitao Dai: Tianjin University
Xiao-Dong Zhang: Tianjin University
Yan-Jun Liu: Southern University of Science and Technology

Nature Communications, 2025, vol. 16, issue 1, 1-12

Abstract: Abstract Recently, near-infrared (NIR) circularly polarized luminescence (CPL) has emerged as a research hotspot owing to its unique application prospects. Atomic precision Au clusters (AuCs) have shown excellent biocompatibility and characteristic emission in the NIR region, and have found various applications in biosensing and imaging. Here, we achieve stable and highly dissymmetric CPL in both visible and NIR regions from cholesteric liquid crystals (CLCs) overlaid on a uniform AuCs film. The glum factors (Maximum 2) in the visible and the NIR regions reach 1.8 and 0.7, respectively. AuCs films are prepared by the anti-solvent precipitation method for the first time. By overlaying wide-band CLCs on the AuCs film, dual CPL is simultaneously realized in both visible and NIR regions. Based on the intrinsic properties of CLCs, electrically tunable, thermally reversible and optically tunable CPL from CLCs/AuCs composites are successfully demonstrated. These features of CLCs/AuCs composites offer possibilities for applications in cryptography and anti-counterfeiting.

Date: 2025
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DOI: 10.1038/s41467-025-64637-y

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