A Hybrid Bilayer Pressure Sensor based on Silver Nanowire

은 나노와이어 기반 하이브리드 이중층 압력 센서

  • Lee, Jin-Young (School of Electrical & Electronic & Communication Engineering, Korea University of Technology and Education) ;
  • Shin, Dong-Kyun (School of Electrical & Electronic & Communication Engineering, Korea University of Technology and Education) ;
  • Kim, Ki-Eun (School of Electrical & Electronic & Communication Engineering, Korea University of Technology and Education) ;
  • Seo, Yu-Seok (Advanced Technology Research Team, YOULCHON CHEMICAL, CO., LTD) ;
  • Park, Jong-Woon (School of Electrical & Electronic & Communication Engineering, Korea University of Technology and Education)
  • 이진영 (한국기술교육대학교 전기.전자.통신공학부) ;
  • 신동균 (한국기술교육대학교 전기.전자.통신공학부) ;
  • 김기은 (한국기술교육대학교 전기.전자.통신공학부) ;
  • 서유석 ((주)율촌화학 기술연구소 선행연구팀) ;
  • 박종운 (한국기술교육대학교 전기.전자.통신공학부)
  • Received : 2017.08.16
  • Accepted : 2017.09.18
  • Published : 2017.09.30

Abstract

We have fabricated flexible and stretchable pressure sensors using silver nanowires (AgNWs) and analyzed their electric responses. AgNWs are spray coated directly onto uncured polydimethylsiloxane (PDMS) such that AgNWs penetrate into the uncured PDMS, enhancing the adhesion properties of AgNWs. However, the single-layered AgNW sensor exhibits unstable electric response and low pressure sensitivity. To tackle it, we have coated a conductive polymer, poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) onto the AgNW layer. Such a hybrid bilayer sensor ensures a stable electric response because the over-coating layer of PEDOT:PSS effectively suppresses the protrusion of AgNWs from PDMS during release. To enhance the sensitivity further, we have also fabricated a stacked bilayer AgNW sensor. However, its electric response varies depending sensitively on the initial overlap pressure.

Keywords

Acknowledgement

Supported by : 한국기술교육대학교

References

  1. Sujie, C., Xiaojun, G., "Improving the Sensitivity of Elastic Capacitive Pressure Sensors Using Silver Nanowire Mesh Electrodes," IEEE Transactions on nanotechnology, vol. 14, pp. 619-623, (2015). https://doi.org/10.1109/TNANO.2015.2422993
  2. Morteza, A., Aekachan, P., Sangjun, L., Seunghwa, R., Inkyu, P., "Highly Stretchable and Sensitive Strain Sensor Based on Silver Nanowire-Elastomer Nanocomposite," ACS Nano, vol. 8, pp. 5154-5163, (2014). https://doi.org/10.1021/nn501204t
  3. Banseok, Y., Chuljon, H., Youngmin, K., Byeongkwon, J., Jongwoong, K., "A wearable piezocapacitive pressure sensor with a single layer of silver nanowire-based elastomeric composite electrodes," Journal of Materials Chemisty A, vol. 4, pp. 10435-10443, (2016).
  4. Muhammad, S., Wasim A, K., Khalid, R., "Fabrication of cost effective and high sensitivity resistive strain gauge using DIW technique," Sensors and Actuators A: Physical, vol. 258, pp. 123-130, 2017. https://doi.org/10.1016/j.sna.2017.03.003
  5. Takeo, Y., Yuhei, H., Yuki, Y., Yoshiki, Y., Ali, I., Don N, F., Kenji, H., "A stretchable carbon nanotube strain sensor for human-motion detection," Nature Nanotechnology, vol. 6, pp. 296-301, (2011). https://doi.org/10.1038/nnano.2011.36
  6. Junpeng, L., Jiajie, L., Lu, L., Fengbo, R., Wei, H., Juan, L., Shuhua, Q., Qibing, P., "Healable Capacitive Touch Screen Sensors Based on Transparent Composite Electrodes Comprising Silver Nanowires and a Furan/Maleimide Diels-Alder Cycloaddition Polymer," ACS NANO, vol. 8, pp. 12874-12882, (2014). https://doi.org/10.1021/nn506610p