Highly Elastic Graphene-Based Electronics Toward Electronic Skin
- Authors
- Yun, Yong Ju; Ju, Jongil; Lee, Joong Hoon; Moon, Sung-Hwan; Park, Soon-Jung; Kim, Young Heon; Hong, Won G.; Ha, Dong Han; Jang, Heeyeong; Lee, Geon Hui; Chung, Hyung-Min; Choi, Jonghyun; Nam, Sung Woo; Lee, Sang-Hoon; Jun, Yongseok
- Issue Date
- Sep-2017
- Publisher
- WILEY-V C H VERLAG GMBH
- Keywords
- bioelectrodes; electronic skins; reduced graphene oxide; solution-based approach; strain sensors
- Citation
- ADVANCED FUNCTIONAL MATERIALS, v.27, no.33
- Journal Title
- ADVANCED FUNCTIONAL MATERIALS
- Volume
- 27
- Number
- 33
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/69820
- DOI
- 10.1002/adfm.201701513
- ISSN
- 1616-301X
1616-3028
- Abstract
- Epidermal electronics are extensively explored as an important platform for future biomedical engineering. Epidermal devices are typically fabricated using high-cost methods employing complex vacuum microfabrication processes, limiting their widespread potential in wearable electronics. Here, a low-cost, solution-based approach using electroconductive reduced graphene oxide (RGO) sheets on elastic and porous poly(dimethylsiloxane) (PDMS) thin films for multifunctional, high-performance, graphene-based epidermal bioelectrodes and strain sensors is presented. These devices are fabricated employing simple coatings and direct patterning without using any complicated microfabrication processes. The graphene bioelectrodes show a superior stretchability (up to 150% strain), with mechanical durability up to 5000 cycles of stretching and releasing, and low sheet resistance (1.5 k Omega per square), and the graphene strain sensors exhibit a high sensitivity (a gauge factor of 7 to 173) with a wide sensing range (up to 40% strain). Fully functional applications of dry bioelectrodes in monitoring human electrophysiological signals (i.e., electrocardiogram, electroencephalography, and electromyogram) and highly sensitive strain sensors for precise detection of large-scale human motions are demonstrated. It is believed that our unique processing capability and multifunctional device platform based on RGO/porous PDMS will pave the way for low-cost processing and integration of 2D materials for future wearable electronic skin.
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