| 초록 |
Polyphenolic compounds have inspired many material scientists to exploit their properties to fabricate functional materials. Here, we exploit their versatile adhesive property and carbonization capability inspired by a natural coalification process to prepare a carbonaceous sealant for fragmented graphene. We adopted a polyphenolic coating composed with pyrogallol (PG) and poly(ethyleneimine) (PEI) which can form an interfacial coating rapidly by spontaneous oxidative crosslinking. The mixture was successfully coated on graphene sheets with low surface energy. By the following thermal annealing process, the polyphenolic coatings were successfully pyrolyzed, forming conductive graphite-like coating. We applied this system to seal an intentionally fragmented CVD-grown graphene sheet. By applying our system, the fragments of graphene sheets were recovered physically and electrically, allowing us to even transfer the damaged graphene into another substrate of interest. |
