Gecko-Inspired Slant Hierarchical Microstructure-Based Ultrasensitive Iontronic Pressure Sensor for Intelligent Interaction

被引:36
作者
Luo, Yongsong [1 ]
Chen, Xiaoliang [1 ,2 ]
Tian, Hongmiao [1 ]
Li, Xiangming [1 ]
Lu, Yangtianyu [1 ]
Liu, Yang [1 ]
Shao, Jinyou [1 ,2 ]
机构
[1] Xi An Jiao Tong Univ, Micro & Nanotechnol Res Ctr, State Key Lab Mfg Syst Engn, Xian 710049, Peoples R China
[2] Xi An Jiao Tong Univ, Frontier Inst Sci & Technol FIST, Xian 710049, Peoples R China
基金
中国国家自然科学基金; 中国博士后科学基金;
关键词
SOFT; SKIN;
D O I
10.34133/2022/9852138
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Highly sensitive flexible pressure sensors play an important role to ensure the safety and friendliness during the human-robot interaction process. Microengineering the active layer has been shown to improve performance of pressure sensors. However, the current structural strategy almost relying on axial compression deformation suffers structural stiffening, and together with the limited area growth efficiency of conformal interface, essentially limiting the maximum sensitivity. Here, inspired by the interface contact behavior of gecko's feet, we design a slant hierarchical microstructure to act as an electrode contacting with an ionic gel layer, fundamentally eliminating the pressure resistance and maximizing functional interface expansion to achieving ultrasensitive sensitivity. Such a structuring strategy dramatically improves the relative capacitance change both in the low- and high-pressure region, thereby boosting the sensitivity up to 36000 kPa(-1) and effective measurement range up to 300 kPa. To verify the advantages of high sensitivity, the sensor is integrated with a soft magnetic robot to demonstrate a biomimetic Venus flytrap. The ability to perceive weak stimuli allows the sensor to be used as a sensory and feedback window, realizing the capture of small live insects and the transportation of fragile objects.
引用
收藏
页数:13
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