Dual-band high-dissymmetry circularly polarized luminescence from cholesteric liquid crystals overlaid a gold cluster film.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 41173943.
- Also identified by DOI 10.1038/s41467-025-64637-y and PMC identifier 12578928.
- Licence recorded as CC BY-NC-ND.
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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 g<sub>lum</sub> 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.