Ultra-Sensitive, Deformable and Transparent Triboelectric Tactile Sensor based on Micro-Pyramid Patterned Ionic Hydrogel for Interactive Human-Machine Interfaces

Tao, Kai, Chen, Zhensheng, Yu, Jiahao, Zeng, Haozhe, Wu, Jin, Wu, Zixuan, Jia, Qingyan, Li, Peng, Fu, Yong Qing, Chang, Honglong and Yuan, Weizheng (2022) Ultra-Sensitive, Deformable and Transparent Triboelectric Tactile Sensor based on Micro-Pyramid Patterned Ionic Hydrogel for Interactive Human-Machine Interfaces. Advanced Science. ISSN 2198-3844 (In Press)

Advanced_Science_Manuscript_Submission_20220101.pdf - Accepted Version

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Rapid advances in wearable electronics and mechno-sensational human-machine interfaces impose great challenges in developing flexible and deformable tactile sensors with high efficiency, ultra-sensitivity, environment-tolerance and self-sustainability. Herein, we report a tactile hydrogel sensor (THS) based on micro-pyramid-patterned double-network (DN) ionic organohydrogels to detect subtle pressure changes by measuring the variations of triboelectric output signal without an external power supply. By the first time of pyramidal-patterned hydrogel fabrication method and laminated PDMS encapsulation process, the self-powered THS shows the advantages of remarkable flexibility, good transparency (~85), and excellent sensing performance, including extraordinary sensitivity (45.97 mV Pa-1 ), fast response (~20 ms), very low limit of detection (50 Pa) as well as high stability (36000 cycles). Moreover, with the LiBr immersion treatment method, the THS possesses excellent long-term hyper antifreezing and anti-dehydrating properties, broad environment tolerance (-20 to 60 ℃), and instantaneous peak power density of 20 μW cm-2 , providing reliable contact outputs with different materials and detecting very slight human motions. The THS shows no apparent output decline under the extreme environments of −29℃, 60℃ and even the vacuum conditions, demonstrating the excellent application potential in the field of harsh environments. By integrating the signal acquisition/process circuit, the THS with excellent self-power sensing ability is utilized as a switching button to control electric appliances and robotic hands by simulating human finger gestures, offering its great potentials for wearable and multi-functional electronic applications.

Item Type: Article
Additional Information: Funding information: This research is supported by the National Natural Science Foundation of China Grant (No. 51705429 & No. 61801525), the Fundamental Research Funds for the Central Universities, Guangdong Natural Science Funds Grant (2018A030313400), Space Science and Technology Foundation, Shenzhen Research Plan (JCYJ20180306171637410), 111 Project No. B13044, UK Engineering and Physical Sciences Research Council (EPSRC) for support under grant EP/P018998/1, International Exchange Grant (IEC/NSFC/201078) through Royal Society UK and the NSFC.
Uncontrolled Keywords: Flexible electronics, Triboelectric tactile sensor, Self-powered hydrogel sensor, Humanmachine interface, Pyramidal-patterned hydrogel
Subjects: G900 Others in Mathematical and Computing Sciences
H600 Electronic and Electrical Engineering
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Rachel Branson
Date Deposited: 14 Jan 2022 10:24
Last Modified: 14 Jan 2022 10:30
URI: http://nrl.northumbria.ac.uk/id/eprint/48172

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