Flexible Conductive Composite Integrated with Personal Earphone for Wireless, Real-Time Monitoring of Electrophysiological Signs

Joong Hoon Lee, Ji Young Hwang, Jia Zhu, Ha Ryeon Hwang, Seung Min Lee, Huanyu Cheng, Sang Hoon Lee, Suk Won Hwang

Research output: Contribution to journalArticlepeer-review

53 Citations (Scopus)


We introduce optimized elastomeric conductive electrodes using a mixture of silver nanowires (AgNWs) with carbon nanotubes/polydimethylsiloxane (CNTs/PDMS), to build a portable earphone type of wearable system that is designed to enable recording electrophysiological activities as well as listening to music at the same time. A custom-built, plastic frame integrated with soft, deformable fabric-based memory foam of earmuffs facilitates essential electronic components, such as conductive elastomers, metal strips, signal transducers and a speaker. Such platform incorporates with accessory cables to attain wireless, real-time monitoring of electrical potentials whose information can be displayed on a cell phone during outdoor activities and music appreciation. Careful evaluations on experimental results reveal that the performance of fabricated dry electrodes are comparable to that of commercial wet electrodes, and position-dependent signal behaviors provide a route toward accomplishing maximized signal quality. This research offers a facile approach for a wearable healthcare monitor via integration of soft electronic constituents with personal belongings.

Original languageEnglish
Pages (from-to)21184-21190
Number of pages7
JournalACS Applied Materials and Interfaces
Issue number25
Publication statusPublished - 2018 Jun 27

Bibliographical note

Funding Information:
This work was supported by the KU-KIST Graduate School of Converging Science and Technology Program, KU Future Research Grant, and a grant of the Korea Health Technology R&D Project through the Korea Health Industry Development Institute (KHIDI), funded by the Ministry of Health & Welfare, Republic of Korea (HI14C0771). The authors also acknowledge the Extreme Science and Engineering Discovery Environment (XSEDE) for providing advanced computing resources and services that have contributed to the research results reported in this paper. We note with sadness that Professor S.-H. Lee passed away before submission.

Publisher Copyright:
© 2018 American Chemical Society.


  • EEG recordings
  • elastomeric composites
  • flexible
  • wearable electronics
  • wireless

ASJC Scopus subject areas

  • General Materials Science


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