Transforming nature into the next generation of bio-based flexible devices: New avenues using deep eutectic systems

Summary This Perspective underscores the use of deep eutectic systems (DESs) as efficient liquid active ingredients (including fully bio-based) and reaction media for biomass exploitation, valorization, and transformation into all-natural functional materials in a nonaqueous environment generally. Specifically, we discuss their employment as reaction media and final component of conductive flexible devices, nonaqueous eutectogels, and self-healing materials. Discussing a brief road map, we also highlight the opportunities that DESs offer for the creation of the next generation of bio-based and biodegradable flexible materials for soft robotics, wearable and implantable devices, artificial skin, edible materials, remote sensing, and substrates for photo- and electrochromic, (mechano)plasmonics, photonic and tribological devices. Taking advantage of their outstanding properties, we envision the rise of transformative technologies within a sustainable framework by using DESs in the years ahead.