Special Issue
  • Wrinkling Conductive Films Based on Vertical Graphene for Stretchable Strain Sensors

  • Hyojung Yong*, Hyeon-Jong Lee**, Ji Won Suk***†

  • * Department of Smart Fab. Technology, Sungkyunkwan University
    ** School of Mechanical Engineering, Sungkyunkwan University
    *** School of Mechanical Engineering, Department of Smart Fab. Technology, SKKU Advanced Institute of Nano Technology(SAINT), Sungkyunkwan University

  • 신축성 스트레인 센서를 위한 수직그래핀 기반 전도성 필름의 주름 구조 생성

  • 용효중* · 이현종** · 석지원***†

  • This article is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Stretchable strain sensors have attracted increasing interest for applications in wearable electronics, human motion monitoring, and soft robotics. To achieve high performance, they must exhibit both high stretchability and sensitivity. In this study, graphene nanosheets were vertically grown on carbon nanofibers using electrospinning followed by thermal chemical vapor deposition. These were combined with two-dimensional reduced graphene oxide to form conductive films. Wrinkling these films enhanced their mechanical compliance, enabling their use as resistive strain sensors. The sensor exhibited a high stretchability of up to 392%, a large gauge factor, and excellent repeatability.


신축성 스트레인 센서는 웨어러블 전자소자, 인체 동작 모니터링, 소프트 로보틱스 등 다양한 응용 분야에서 관심을 모으고 있다. 이러한 신축성 스트레인 센서는 고성능을 달성하기 위하여 높은 신축성과 민감도를 동시에 갖추어야 한다. 본 연구에서는 전기방사 후 열화학기상증착법을 통해 탄소나노섬유 위에 그래핀 나노시트를 수직 성장시켰다. 이렇게 얻은 구조를 2차원 환원그래핀과 결합하여 도전성 필름을 형성하였다. 필름에 주름 구조를 도입해 기계적 신축성을 향상시켰으며, 이를 통해 저항 변화 방식의 스트레인 센서를 구현하였다. 제작된 센서는 최대 392%의 높은 신축성과 큰 게이지팩터, 우수한 반복성을 보였다.


Keywords: 스트레인 센서(Strain sensor), 그래핀(Graphene), 탄소나노섬유(Carbon nanofiber), 주름(Wrinkle)

This Article

Correspondence to

  • Ji Won Suk

  • School of Mechanical Engineering, Department of Smart Fab. Technology, SKKU Advanced Institute of Nano Technology(SAINT), Sungkyunkwan University

  • E-mail: jwsuk@skku.edu