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Tilted magnetic micropillars enabled dual-mode sensor for tactile/touchless perceptions
Zhou, Qian1; Ji, Bing1; Hu, Bin2; Li, Shunbo3; Xu, Yi3; Gao, Yibo4,5; Wen, Weijia5; Zhou, Jun2; Zhou, Bingpu1
2020-12-01
Source PublicationNano Energy
ISSN2211-2855
Volume78
Abstract

The smart flexible devices that can implement both tactile and touchless sensing in real-time have attracted abundant interest due to the high demand for human-machine interaction (HMI), internet of things (IoT) and virtual reality (VR) system. However, obtaining the sensor that can precisely monitor signals via contact/non-contact modes without overlapping while in a facile and cost-effective methodology is still a challenge. Herein, we introduce a flexible dual-mode capacitive sensor for pressure (contact) and magnetic field (non-contact) detection based on magnetic tilted micropillar array (MTMPA) via a facile and tunable methodology. The MTMPA sandwiched in AgNW/PDMS electrodes can response to the external pressure and magnetic field with bidirectional deflection, allowing the sensor to precisely distinguish different stimuli in real-time without overlapping. With the optimal structure, the sensor exhibits high performance of magnetic response with sensitivity of −0.69 T, detection limit of 25 mT and excellent recoverability. The sensor also exhibits high pressure sensitivity of 0.301 kPa (0–2 kPa) with the ultra-low detection limit of 1.2 Pa with excellent repeatability and mechanical robustness. As a proof of concept, practical wearable tactile applications (e.g. pulse-sensing, voice recognition, finger touching, pressure mapping and dynamic tracking) and touchless demonstrations such as magnetic field identification and trajectory tracking have been presented. The sensitive response of the sensor to external magnetic fields also enables us to customize the non-contact Braille recognition system through arranging specific magnet patterns, where the characters such as ‘a’, ‘b’, ‘c’, and ‘d’ have been well distinguished without direct contact. The results experimentally prove the profound significance of the methodology for potential uses towards health monitoring, body motion feedback, and human-machine interface, etc.

KeywordContactless Sensing Electronic Skin Flexible Sensor Tilted Micropillar Array
DOI10.1016/j.nanoen.2020.105382
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS SubjectChemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
WOS IDWOS:000596610800004
Scopus ID2-s2.0-85091249679
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Document TypeJournal article
CollectionINSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Corresponding AuthorZhou, Bingpu
Affiliation1.Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering, University of Macau, Avenida da Universidade, Taipa, 999078, Macao
2.Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, 430074, China
3.Key Laboratory of Optoelectronic Technology and Systems, Ministry of Education & Key Disciplines Laboratory of Novel Micro-Nano Devices and System Technology, College of Optoelectronics Engineering, Chongqing University, Chongqing, 400044, China
4.Shenzhen Shineway Hi-Tech Corporation, Shenzhen, 518112, China
5.Department of Physics, The Hong Kong University of Science and Technology, Kowloon, Clear Water Bay, 999077, Hong Kong
First Author AffilicationINSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Corresponding Author AffilicationINSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Recommended Citation
GB/T 7714
Zhou, Qian,Ji, Bing,Hu, Bin,et al. Tilted magnetic micropillars enabled dual-mode sensor for tactile/touchless perceptions[J]. Nano Energy, 2020, 78.
APA Zhou, Qian., Ji, Bing., Hu, Bin., Li, Shunbo., Xu, Yi., Gao, Yibo., Wen, Weijia., Zhou, Jun., & Zhou, Bingpu (2020). Tilted magnetic micropillars enabled dual-mode sensor for tactile/touchless perceptions. Nano Energy, 78.
MLA Zhou, Qian,et al."Tilted magnetic micropillars enabled dual-mode sensor for tactile/touchless perceptions".Nano Energy 78(2020).
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