Sandwich-structured flexible PDMS@graphene multimodal sensors capable of strain and temperature monitoring with superlative temperature range and sensitivity

For the purpose of extending the flexible sensor applied for diverse applications, this study proposed a novel flexible and sandwich-structured polydimethylsiloxane (PDMS)@graphene sensor by the one-step solvent evaporation method. The prepared PDMS@graphene sensor exhibits resistivity dependence on both temperature and strain changes. For instance, the PDMS@graphene flexible sensor carried out a monitoring temperature range of −40 to 300 °C with the superlative thermal index and strain sensitivity of 12015.86 K and 2175.8, respectively. The monitoring resolution of the PDMS@graphene sensor achieved 0.5 °C and 0.0625% for the temperature and strain with excellent repeatability. Accordingly, the innovative flexible PDMS@graphene sensor presents broad application prospects for structural components, biomedicine equipment, smart wearable textiles, and safety monitoring.