CNT/PDMS-based canal-typed ear electrodes for inconspicuous EEG recording

Joong Hoon Lee, Seung Min Lee, Hang Jin Byeon, Joung Sook Hong, Kwang Suk Park, Sang Hoon Lee

Research output: Contribution to journalArticlepeer-review

60 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)46014
Number of pages1
JournalJournal of Neural Engineering
Issue number4
Publication statusPublished - 2014 Aug 1

ASJC Scopus subject areas

  • Medicine(all)


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