Figure 12
From: Implantable Biofuel Cells Operating In Vivo—Potential Power Sources for Bioelectronic Devices
Electrochemical tattoo biosensor for real-time noninvasive lactate monitoring during fitness activity. Similar externally located biocatalytic electrodes can be used for assembling wearable biofuel cells producing electrical power extracted from external biofluids, for example, sweat. (The image was kindly provided by Joseph Wang, University California San Diego, USA.)