Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 10, Issue 15, Pages 12816-12823Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b01050
Keywords
graphene; capacitive pressure sensor; flexible electronics; sandwich-like structure; nylon netting
Funding
- National Natural Science Foundation of China [51772335]
- Guangdong Natural Science Foundation [2016A030313346, 2014A030306022]
- Guangdong Youth Top-notch Talent Support Program [2015TQ01C201]
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Flexible pressure sensors are of great importance to be applied in artificial intelligence and wearable electronics. However, assembling a simple structure, high-performance capacitive pressure sensor, especially for monitoring the flow of liquids, is still a big challenge. Here, on the basis of a sandwich-like structure, we propose a facile capacitive pressure sensor optimized by a flexible, low-cost nylon netting, showing many merits induding a high response sensitivity (0.33 kPa(-1)) in a low-pressure regime (<1 kPa), an ultralow detection limit as 3.3 Pa, excellent working stability after more than 1000 cycles, and synchronous monitoring for human pulses and clicks. More important, this sensor exhibits an ultrafast response speed (<20 ms), which enables its detection for the fast variations of a small applied pressure from the morphological changing processes of a droplet falling onto the sensor. Furthermore, a capacitive pressure sensor array is fabricated for demonstrating the ability to spatial pressure distribution. Our developed pressure sensors show great prospects in practical applications such as health monitoring, flexible tactile devices, and motion detection.
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