
Abstract Laser‐induced graphene (LIG) has been so far obtained from polymer precursors and proposed for numerous applications, including various types of sensors and energy storage solutions. This study examines a radically different class of new precursors for LIG, distinct from polymers: inks and dyes. The identification of specific organic dyes present in commercial markers demonstrates that the aromatic structure, in conjunction with high thermal stability (residual weight > 20% at 800°C), are key factors for laser‐induced pyrolysis. Eosin Y is identified as an excellent LIG precursor, comparable with well‐known polyimide. The unique properties of dyes allow for dispersion in various media, such as acrylic binder. A dye concentration of 0.75 mol L −1 in acrylic binder results in a conductivity of 34 ± 20 S cm −1 for LIG. The composition and microstructure of LIG from dyes are thoroughly characterized, revealing peculiar features. A versatile “Paint & Scribe” methodology is introduced, enabling to integrate LIG tracks onto any wettable surface, and in particular onto printed and flexible electronics. A process for obtaining freestanding and transferrable LIG is demonstrated by dissolving acrylic paint in acetone and floating LIG in water. This advancement offers novel avenues for diverse applications that necessitate a transfer process of LIG.
Eosin Y; dye; freestanding; ink; laser‐induced graphene; pyrolysis; transfer, Eosin Y, dye, laser‐induced graphene, Science, Q, ink, freestanding, dye; Eosin Y; freestanding; ink; laser-induced graphene; pyrolysis; transfer, pyrolysis, Research Article
Eosin Y; dye; freestanding; ink; laser‐induced graphene; pyrolysis; transfer, Eosin Y, dye, laser‐induced graphene, Science, Q, ink, freestanding, dye; Eosin Y; freestanding; ink; laser-induced graphene; pyrolysis; transfer, pyrolysis, Research Article
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