Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 12, Issue 11, Pages 13287-13295Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b21751
Keywords
ultrasensitive; photolithography; strain sensor; carbon nanotubes; Au film; human health monitoring
Funding
- National Natural Science Foundation of China [51703020, 51322305, 51732003, 51973024, 61574032]
- 111 Project [B13013]
- Fundamental Research Funds for the Central Universities [DUT19JC54]
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The development of strain sensors with high sensitivity and stretchability, which can accurately detect different human activities such as subtle physiological signals and large-scale joint motions is essential for disease diagnosis and human health monitoring. However, achieving both high sensitivity and stretchability is still an enormous challenge at the moment, particularly for intrinsically stretchable strain sensors. Herein, utilizing large differences in the conductivity and stretchability of micropatterned Au and SWCNTs, we present an ultrasensitive intrinsically stretchable strain sensor by a one-step photolithography process. Its high sensitivity is inspired from spiders' slit organ and the high stretchability is enlightened from spiders' neural pathway. The skin-like sensor exhibits many superior merits, including ultrahigh sensitivity (gauge factors of 7.1 X 10(4) to 3.4 X 10(6)), wide detection range (up to 100% strain), excellent durability (1000 cycles), ultralow limit of detection (0.1% strain), fast response (1.3 ms), and minimal feature size (<= 100 mu m). These fascinating merits allow the strain sensor to precisely detect diverse human activities. This work opens up a feasible path to fabricate highly sensitive and stretchable strain sensors, presenting their promising potential in future personalized healthcare, as electronic skins, and being a portable friendly human-machine interaction system.
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