KMS Chongqing Institute of Green and Intelligent Technology, CAS
| Biomimetic nanofiber-iongel composites for flexible pressure sensors with broad range and ultra-high sensitivity | |
Gou, Xin1,3; Yang, Jun2  ; Li, Pei2,3; Zhou, Zhihao4; Liao, Changrong3; Zhang, Chao2; Dong, Chenhui1,2; Li, Chunbao1
| |
| 2024-02-01 | |
| 摘要 | To achieve high-performance flexible pressure sensors, it is imperative to develop biomimetic devices that mimic the functional structure and sensing mechanism of human skin. Nevertheless, the creation of skin-like sensors with both ultra-high sensitivity and broad response range poses a formidable challenge. Drawing inspiration from the tactile sensing mechanisms and hierarchical structure of human skin, we engineered a nanofiberiongel (NFIG) composite with internally graded stiffness characteristics and surface semi-embedded microstructures through the application of electrostatic spinning and droplet injection methods. The gel mimics the layered nanofiber structure of human skin, along with its ion-sensing mechanism, and comprises an ion gel infused with highly elastic PVDF-HFP nanofibers. This study explores the impact of Young's modulus and external pressure on unit capacitance, and it establishes a fiber-gel composite model to assess how the fibers influence sensor performance, encompassing ion fluxes, displacements, and alterations in electric potential. These findings reveal that the utilization of high-modulus materials enhances ion mobility, decreases the double electrical layer thickness, and augments pressure resistance. Based on these discoveries, we engineered the NFIG sensor, which exhibits ultra-high sensitivity (> 10,000 kPa(-1)), a wide pressure range (similar to 1000 kPa), and exceptional stability (over 5000 cycles). Furthermore, this sensor is versatile, finding utility in a range of human monitoring contexts, array configurations, and even skateboard monitoring, thereby substantiating its promise in the fields of humancomputer interaction and sports health. |
| 关键词 | Iontronic sensor Skin -inspired PVDF-HFP Gradient stiffness Semi -embedded microstructures Nanofiber-Iongel composites |
| DOI | 10.1016/j.nanoen.2023.109140 |
| 发表期刊 | NANO ENERGY
 |
| ISSN | 2211-2855 |
| 卷号 | 120页码:11 |
| 通讯作者 | Yang, Jun(jyang@cigit.ac.cn) ; Zhou, Zhihao(zhouzh@cqupt.edu.cn) ; Li, Chunbao(lichunbao301@163.com) |
| 收录类别 | SCI |
| WOS记录号 | WOS:001135431600001 |
| 语种 | 英语 |
