Photoinduced polymer-confined CQDs for efficient photoluminescent 2D/3D printing applications

Jessica Plé (1) , Corneliu S Stan (2) , Didier Zanghi (1) , Cécile Genevois (1) , Samar Hajjar-Garreau (3) , Lavinia Balan (1, 4, 3)

1 CEMHTI - Conditions Extrêmes et Matériaux : Haute Température et Irradiation
2 TUIASI - "Gheorghe Asachi" Technical University of Iasi
3 IS2M - Institut de Science des Matériaux de Mulhouse
4 Université de Haute-Alsace (UHA) - Université de Haute-Alsace (UHA) Mulhouse - Colmar

CQD-loaded photopolymers were efficiently synthesized using commercially available materials in an easy one step process, combining the fast thermal decomposition of a carbon precursor with the direct integration into photopolymerizable acrylate formulations. Depending on the polymer matrix, the nanocomposites exhibited different optical properties as a result of their surface chemistry and dispersion state, while maintaining similar blue fluorescence in the 425–470 nm region. The CQD@ triacrylate photoluminescent films showed the highest quantum yield (B65%), most likely due to improved nanoparticle confinement inside the crosslinked network, compared to the diacrylate or co-polymer matrixes. The low viscosity of the monomer dispersions allowed them to be used as fluorescent inks for glass and textile coatings, 2D stenciling/stamping of various shapes or as photocurable resins for 3D printing in the near visible region. This provides promising future applications in optics, nanomedicine, sensing, anti-counterfeiting or textile functionalization.

Mots clés: carbon quantum dots, polymer-confined CQDs, photoluminescents materials, 2D and 3D printing

Domaines: Chimie; Sciences de l'ingénieur [physics]

Jessica Plé, Corneliu S Stan, Didier Zanghi, Cécile Genevois, Samar Hajjar-Garreau, et al.. Photoinduced polymer-confined CQDs for efficient photoluminescent 2D/3D printing applications. Materials Advances, 2023, 4 (21), pp.5140-5148. ⟨10.1039/d3ma00293d⟩. ⟨hal-04273627⟩