期刊
JOURNAL OF MATERIALS CHEMISTRY C
卷 8, 期 12, 页码 4271-4278出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0tc00054j
关键词
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资金
- Wearable Platform Materials Technology Center (WMC) - National Research Foundation of Korea (NRF) Grant by the Korean Government (MSIT) [2016R1A5A1009926]
- Nano-Material Technology Development Program through the NRF - Ministry of Science, ICT and Future Planning [2016M3A7B4905609]
Flexible and wearable pressure sensors, which can detect various pressures generated by the human body and convert them into electrical signals, are of great interest because they have a wide variety of applications for an interface between humans and external devices. Elastomeric dielectric materials for commercial piezocapacitive pressure sensors need to be manufactured quickly and easily via cost-effective methods. Herein, we report a piezocapacitive pressure sensor based on a three-dimensional macroporous dielectric layer fabricated by a rapid and facile baking-inspired foaming process. The pressure sensor showed high sensitivities of 0.16 +/- 0.03 kPa(-1) (at <1 kPa) and 0.14 +/- 0.02 kPa(-1) (at 1-10 kPa) and a low detection limit of 9.8 Pa. Furthermore, 10 000 repetitive compressing and releasing cycles confirmed its reliability. We established that the pressure sensor could move virtual fingers by detecting finger gripping pressure in real time. The respiration rate was also detected by the pressure sensor. A large-scale pressure sensor array was constructed to demonstrate a scaled-up fabrication process. The array accurately recognized spatially distributed pressures generated by objects.
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