The NBEL has developed versatile sticky polymeric materials mimicking adhesion mechanism of nature creatures, such as marine mussels, sandcastle worms, and tunicates, and astringency originating from plants. The tissue-adhesive materials effectively form 1D particulates for drug delivery, 2D pre-hydrogel film for the interface of wearable/implantable bioelectronics, and 3D hydrogels for hemostasis and tissue repair. We are highly interested in a new class of technologies for solving the issues associated with peripheral nerve defect, brain disorders and cardiovascular diseases.