CNT/PDMS-based canal-typed ear electrodes for inconspicuous EEG recording
Related Experiment Video
Updated: Apr 27, 2026
Recording Brain Activity with Ear-Electroencephalography
Published on: March 31, 2023
Joong Hoon Lee1, Seung Min Lee, Hang Jin Byeon
1Department of Bio-convergence Engineering, College of Health Science, Korea University, Seoul 136-100, Korea.
Objective:
Current electroencephalogram (EEG) monitoring systems typically require cumbersome electrodes that must be pasted on a scalp, making a private recording of an EEG in a public place difficult. We have developed a small, user friendly, biocompatible electrode with a good appearance for inconspicuous EEG monitoring.
Approach:
We fabricated carbon nanotube polydimethylsiloxane (CNT/PDMS)-based canal-type ear electrodes (CEE) for EEG recording. These electrodes have an additional function, triggering sound stimulation like earphones and recording EEG simultaneously for auditory brain-computer interface (BCI). The electrode performance was evaluated by a standard EEG measurement paradigm, including the detection of alpha rhythms and measurements of N100 auditory evoked potential (AEP), steady-state visual evoked potential (SSVEP) and auditory steady-state response (ASSR). Furthermore, the bio- and skin-compatibility of CNT/PDMS were tested.
Main Results:
All feasibility studies were successfully recorded with the fabricated electrodes, and the biocompatibility of CNT/PDMS was also proved.
Significance:
These electrodes could be used to monitor EEG clinically, in ubiquitous health care and in brain-computer interfaces.
