Advanced conductive eutectogel material for flexible sensor applications

Traditional materials fall short in terms of performance, sustainability, and compliance with standards as the demand for flexible and multifunctional devices in the robotics, electronics, and healthcare sectors increases. The primary challenge of critical relevance is coupling primary properties, i.e., mechanical flexibility, electrical conductivity, and environmental sensitivity, into a single material system. Although significant advancements have been made with synthetic polymers and gel materials, the answer lies in eutectogels, which balance the favorable characteristics of gel materials with those of eutectic systems. Eutectogels represent a novel emergent class of multifunctional soft materials that sparked a lot of interest in the transformative potential, particularly in wearable electronics and biomedicine. With the need for advanced materials with synergistic properties, particularly stretchability, toughness, breaking elongation, self-adhesion, self-healing, conductivity, sensitivity design, and substantial biocompatibility increases, eutectogels offer enticing solutions to today's technological challenges. Their broad use is hindered by the absence of comprehensive information on their design strategies, fabrication techniques, and incorporation of multifunctional aspects. This review aims to provide a comprehensive overview of eutectogels, highlighting their common design strategies and the key synthesis mechanisms, focusing on their remarkable properties and applications in flexible sensing devices, energy storage, and the current application of multifunctional eutectogels in healthcare systems.