Date of this Version
United States Patent Application Publication Tan et al . Pub . No . : US 2018 / 0136065 A1
A device includes a capacitive sensor having a hydrogel structure that includes a first surface and a second surface . A first electrode is provided at the first surface of the hydrogel structure , the first electrode including a network of conductive nanoparticles extending into the hydrogel structure . A second electrode is provided at the second surface of the hydrogel structure .