What question did this study set out to answer?

The aim is to explore the emission of circularly polarized light from films made with rhodamine 6G and cellulose nanocrystals.

February 28, 2026Open Access

Circularly polarized light from rhodamine 6G containing chiral nematic cellulose nanocrystal films

Key Points

The aim is to explore the emission of circularly polarized light from films made with rhodamine 6G and cellulose nanocrystals.
Prepared cellulose nanocrystal films via evaporation of CNC suspension.
Incorporated rhodamine 6G dye into films using ethanolic solution.
Characterized the degree of circularly polarized light and dissymmetry factor.
Films emitted circularly polarized light with predominant right-handed intensity.
Achieved clear dissymmetry factor (g lum) up to -0.18.
Demonstrated potential for renewable chiral photonic devices.

Abstract

Abstract Using a simple preparation method of evaporation of cellulose nanocrystal (CNC) suspension, self-supported iridescent films with selective circular Bragg reflection were produced. This effect was maintained after insertion of rhodamine 6G (Rh6G) dye in ethanolic solution. The films containing Rh6G exhibit circularly polarized light (CP-light) emission showing larger right-handed intensity. The resulting films demonstrated a distinctive helical arrangement, which imparted circular polarization to the emitted luminescence of the embedded Rh6G. The degree of CP-light was characterized revealing a clear dissymmetry factor ( g lum ) with a value of up to − 0.18. These findings highlight the potential of CNC-based materials in developing renewable, chiral photonic devices and advanced optoelectronic applications. Graphical abstract

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