Extended Data Fig. 2: Mechanical performance characterizations of the PAAm hydrogel.
From: Encoding of tactile information in hand via skin-integrated wireless haptic interface
a, Photograph of PAAm hydrogel sample during tensile test. b, Stress-strain curve of PAAm hydrogel. c, Peel-off strength test of a hydrogel film to the silicone skin replica with a peeling angle of 90°. Inset: the detailed morphology photo of the skin replica. d, The measured peel strength during the peeling. The maximum strength is ~10mN/cm. e, Photograph showing a PAAm hydrogel patch adhered to the skin of fingertip. f, Photograph showing peeling off the hydrogel patch after wearing it for 1 hour, and still adhered to the skin.
