Viscoelastic surface electrode arrays to interface with viscoelastic tissues

Bioelectronic interfacing with living tissues should match the biomechanical properties of biological materials to reduce damage to the tissues. Here, the authors present a fully viscoelastic microelectrode array composed of an alginate matrix and carbon-based nanomaterials encapsulated in a viscoelastic hydrogel for electrical stimulation and signal recording of heart and brain activities in vivo.