Highly Conformable, Transparent Electrodes for Epidermal Electronics

Jin Hoon Kim, Seung Rok Kim, Hye Jun Kil, Yu Chan Kim, Jin Woo Park

Research output: Contribution to journalArticlepeer-review

72 Citations (Scopus)

Abstract

We present a highly conformable, stretchable, and transparent electrode for application in epidermal electronics based on polydimethylsiloxane (PDMS) and Ag nanowire (AgNW) networks. With the addition of a small amount of a commercially available nonionic surfactant, Triton X, PDMS became highly adhesive and mechanically compliant, key factors for the development of conformable and stretchable substrates. The polar functional groups present in Triton X interacted with the Pt catalyst present in the PDMS curing agent, thereby hindering the cross-linking reaction of PDMS and modulating the mechanical properties of the polymer. Due to the strong interactions that occur between the polar functional groups of Triton X and AgNWs, AgNWs were effectively embedded in the adhesive PDMS (a-PDMS) matrix, and the highly enhanced conformability, mechanical stretchability, and transparency of the a-PDMS matrix were maintained in the resulting AgNW-embedded a-PDMS matrix. Finally, wearable strain and electrocardiogram (ECG) sensors were fabricated from the AgNW-embedded a-PDMS. The a-PDMS-based strain and ECG sensors exhibited significantly improved sensing performances compared with those of the bare PDMS-based sensors because of the better stretchability and conformability to the skin of the former sensors.

Original languageEnglish
Pages (from-to)4531-4540
Number of pages10
JournalNano letters
Volume18
Issue number7
DOIs
Publication statusPublished - 2018 Jul 11

Bibliographical note

Funding Information:
This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) and the Ministry of Education (grant no. 2015R1D1A1A01061340). This study was also funded by the Ministry of Science, ICT & Future Planning (grant no. 2018R1A2B6001390) and the Joint Program for Samsung Electronics-Yonsei University.

Publisher Copyright:
© 2018 American Chemical Society.

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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