Affiliation:
1. Department of Materials Science State Key Laboratory of Molecular Engineering of Polymers Fudan University Shanghai 200433 China
2. School of Information Science and Technology Fudan University Shanghai 200433 China
3. School of Microelectronics and State Key Laboratory of Integrated Chip and Systems Fudan University Shanghai 200433 China
Abstract
AbstractThe quality of electrophysiological (EP) signals heavily relies on the electrode's contact with the skin. However, motion or exposure to water can easily destabilize this connection. In contrast to traditional methods of attaching electrodes to the skin surface, this study introduces a skin‐integration strategy inspired by the skin's intergrown structure. A highly conductive and room‐temperature curable composite composed of silver microflakes and polydimethylsiloxane (Ag/PDMS) is applied to the skin. Before curing, the PDMS oil partially diffuse into the stratum corneum (SC) layer of the skin. Upon curing, the composite solidifies into an electrode that seamlessly integrated with the skin, resembling a natural extension. This skin‐integration strategy offers several advantages. It minimizes motion artifacts resulting from relative electrode‐skin displacement, significantly reduces interface impedance (67% of commercial Ag/AgCl gel electrodes at 100 Hz) and withstands water flushes due to its hydrophobic nature. These advantages pave the way for promising advancements in EP signal recording, particularly during motion and underwater conditions.
Funder
National Natural Science Foundation of China
Subject
Biomaterials,Biotechnology,General Materials Science,General Chemistry