Fig. 1: Schematic illustration of the flexible wood-based origami electronics.

a The process of making TWF. b Preparation of a wood-based electronic device by 3D-printing cellulose-based conductive ink on a TWF surface. c The schematic illustration of wood-based origami electronic products with favorable shape programmability and stable conductivity under reversible folding/unfolding deformation. The advantages of TWF origami electronics are highlighted including anisotropy, favorable flexibility, mechanical robust, programmability and recyclability. d The potential application of TWF origami electrons in human motion sensors.