Fig. 4: Application in a drug releasing device.
From: A high-current hydrogel generator with engineered mechanoionic asymmetry
a In vitro demonstration of electrically controlled drug release with “on-off” cycles driven by the hydrogel generator. The “on” state (blue) represents tapping the device to provide output current. b Schematic (upper) and photography (bottom) of the self-powered drug-releasing patch (see details and results of the animal experiment in Methods and Supplementary Fig. 29, 30). c Photographs of the wound during the healing process with a standard patch (upper) and the SAP (lower). Scale bar: 5 mm. d The relative area of wounds as a function of healing time. On the last day, the wound area covered by the normal patch and SAP was reduced to 32% and 11% of the initial wound area, respectively. Data are reported as their mean value ± SDs from n = 3 independent samples. Source data are provided as a Source Data file.
