Graphene oxide composite hydrogels for wearable devices

For graphene oxide (GO) composite hydrogels, a two-dimensional GO material is introduced into them, whose special structure used to improve their properties. contains abundant oxygen-containing functional groups, which can the mechanical properties of hydrogels and support application needs. Especially, unique-conjugated endow or enhance stimulation response hydrogels. Therefore, have great potential in field wearable devices. We referred works published recent years, reviewed from these aspects: (a) GO; (b) factors affecting hydrogel, including hydrogen bond, ionic coordination bond physical crosslinking; (c) stimuli signals; (d) challenges. Finally, we summarized research progress devices, put forward some prospects.