Dermalink: an All-Polymer Electrode Array for Wearable Electrophysiology

This work presents DermaLink, a pioneering allpolymer wearable electrophysiological electrode, marking a significant advancement in bioelectronics. Building on our prior research, we developed PEG-PEDOT-NET, a key conductive polymer achieving high conductivity ($>250 \mathrm{S} / \text{cm}$), stretchability ($>70 \%$strain), and low impedance ($6.16 \mathrm{k} \Omega$at 1 kHz) with$2 \mu ~\mathrm{m}$photolithography resolution. Unlike metal-based or hybrid electrodes, DermaLink's metal-free design ensures superior biocompatibility and skin compliance, minimizing motion artifacts. The 18 channel DermaLink delivers high-fidelity EMG signals for gesture recognition, with mechanical stability ($