To achieve high signal quality with low-motion artifact for long-time monitoring, dry electrodes being ultra-conformably adhesive to skin and sufficiently mechano-electrical stable are highly desirable for biopotential monitoring.Ĭonducting polymer 14, 15, 16, 17, 18 and gold film 13, 17 are two frequently studied dry electrodes for electrophysiological recordings.
#MOTION ARTIFACT FULL#
This is because superficial portions of the face muscles are uneven, full of wrinkles, and inevitably large-shape changed. Specifically, when detecting facial electrophysiological signals, gel electrodes are easily detached from skin, resulting in poor electrophysiological signal resolution. Moreover, with the gel interfacing on skin, electrode displacement with respect to skin will cause severe motion artifact 12, 13. Although they provide good signal quality, the electrolytic gel may irritate the skin and will dry in a certain period, making it impossible for long-term monitoring and diagnosis. Skin-contact electrodes in clinical use are mainly pregelled Ag/AgCl 9, 10, 11. The ability to accurately and imperceptibly monitor electrophysiological signals is the most basic requirement for wearable electronics 8.
Skin-contact electrophysiology, such as electromyography (EMG), electrocardiography (ECG), electrooculogram (EOG), and electroencephalogram (EEG), relying on the recording of biopotential, are important clinical measurements to assess health status. It can open new pathways for wearable healthcare 1, 2, 3, athletic training, drug delivery systems 4, human-machine interaction 5, 6, 7, etc. Together with ultra-thin nature, this dry epidermal electrode is able to accurately monitor electrophysiological signals such as facial skin and brain activity with low-motion artifact, enabling human-machine interfacing and long-time mental/physical health monitoring.Įpidermal electronics refer to electronic devices that are mounted on the epidermis and able to acquire information about the body precisely or to provide therapy to the body. The enhanced optoelectronic performance was due to the synergistic effect between graphene and poly (3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS), which induced a high degree of molecular ordering on PEDOT and charge transfer on graphene by strong π-π interaction. It showed low sheet resistance (~24 Ω/sq, 4142 S/cm), high transparency, and mechano-electrical stability. Here, we report a ~100 nm ultra-thin dry epidermal electrode that is able to conformably adhere to skin and accurately measure electrophysiological signals. Stiff and bulky pregelled electrodes are now commonly used in clinical diagnosis, causing severe discomfort to users for long-time using as well as artifact signals in motion. Accurate and imperceptible monitoring of electrophysiological signals is of primary importance for wearable healthcare.
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