논문 해외 국제전문학술지(SCI급) Highly sensitive soft pressure sensors for wearable applications based on composite films with curved 3D carbon nanotube structures
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2024-01
- 저자명 Young Jung, Jimin Gu, Jinwook Yeo, Wookjin Lee, Hyeonseok Han, Jungrak Choi, Ji‐Hwan Ha, Junseong Ahn, Hanchul Cho, Seunghwa Ryu, Inkyu Park
- 학술지명 Small
- 발행국가 해외
- 논문언어 외국어
- 원문 링크 https://onlinelibrary.wiley.com/doi/abs/10.1002/smll.202303981
홈페이지논문 초록 (Abstract)
Soft pressure sensors based on 3D microstructures exhibit high sensitivity in the low-pressure range, which is crucial for various wearable and soft touch applications. However, it is still a challenge to manufacture soft pressure sensors with sufficient sensitivity under small mechanical stimuli for wearable applications. This work presents a novel strategy for extremely sensitive pressure sensors based on the composite film with local changes in curved 3D carbon nanotube (CNT) structure via expandable microspheres. The sensitivity is significantly enhanced by the synergetic effects of heterogeneous contact of the microdome structure and changes of percolation network within the curved 3D CNT structure. The finite-element method simulation is used to comprehend the relationships between the sensitivity and mechanical/electrical behavior of microdome structure under the applied pressure. The sensor shows an excellent sensitivity (571.64 kPa−1) with fast response time (85 ms), great repeatability, and long-term stability. Using the developed sensor, a wireless wearable health monitoring system to avoid carpel tunnel syndrome is built, and a multi-array pressure sensor for realizing a variety of movements in real-time is demonstrated.