fig1
![Development of soft dry electrodes: from materials to structure design](https://image.oaes.cc/b3fdc4a5-c4fc-41ce-81bc-97cfe13b060c/ss3016-fig.1.jpg)
Figure 1. (A-D) Schematic diagram of contact between electrodes (the wet electrode, the capacitive electrode, the invasive microneedle electrode, and the common-contact dry electrode, respectively) and skin[16]. Reprinted with permission. Copyright 2021, MDPI.