Hybrid porous micro structured finger skin inspired self-powered electronic skin system for pressure sensing and sliding detection

被引:137
作者
Chen, Haotian [1 ]
Song, Yu [2 ]
Guo, Hang [1 ]
Miao, Liming [2 ]
Chen, Xuexian [1 ]
Su, Zongming [2 ]
Zhang, Haixia [1 ,2 ]
机构
[1] Peking Univ, Acad Adv Interdisciplinary Studies, Beijing 100871, Peoples R China
[2] Peking Univ, Inst Microelect, Natl Key Lab Nano Micro Fabricat Technol, Beijing 100871, Peoples R China
基金
北京市自然科学基金; 中国国家自然科学基金;
关键词
Fingerprint inspired triboelectric generator; Hybrid porous microstructure; Multi-functional e-skin; Self-powered e-skin system; TRIBOELECTRIC ACTIVE SENSOR; NANOGENERATORS; SUPERCAPACITOR; DESIGN; ENERGY; ARRAY; FILMS; OXIDE;
D O I
10.1016/j.nanoen.2018.07.001
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Fingertip is the most sensitive region in human body due to the unique fingerprint patterns and interlocked structure between epidermal-dermal, which amplify the tactile stimuli and enhance the sensitivity. Inspired by the complicated anatomical structure, we fabricated a finger skin inspired e-skin system composed of fingerprint inspired triboelectric generator (TENG), epidermal-dermal inspired hybrid porous microstructure (HPMS) pressure sensor and subcutaneous fat inspired fabric based porous supercapacitor (FPSC). The TENG is responsible for detecting sliding direction and speed with the help of the four spiral electrodes, which adopt the frequency rather than the amplitude to detect the signal to avoid interfere from the environment. The HPMS, on the one hand, integrates the advantages from both the microstructure and porous structure to enhance the sensitivity further. On the other hand, the sensitivity of HPMS sensor is tunable by designing the shape and porosity of the HPMS, which is proved by theory, simulation and experiment. The FPSC, which can tolerate some degree of compression, works to supply energy for the pressure sensor. In this way, the sensor system can work independently without external battery. As a proof-of-concept demonstration, this sensor system has been used to detect complex action including pressure and sliding. During this process, the pressure and sliding direction and speed can be detected simultaneously without connecting to external energy source, showing its potential application area in soft robot and wearable devices.
引用
收藏
页码:496 / 503
页数:8
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