Nanowerk  December 14, 2021 An international team of researchers (Denmark, Finland) has designed a new electronic material called CareGum by mixing silk fibroin and reduced graphene oxide. They used a phenolic glue to facilitate sacrificial and hierarchical hydrogen bonds. The hierarchal bonding scheme gives rise to high mechanical toughness, record-breaking elongation capacity of ≈25 000%, excellent conformability to arbitrary and complex surfaces, 3D printability, a tenfold increase in electrical conductivity, and a fourfold increase in Young’s modulus compared to its pristine counterpart. Since its conductivity is based on ions, CareGum can convey information over longer distances than rigid electronics based […]