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Flexible Ferroelectric Sensors with Ultrahigh Pressure Sensitivity and Linear Response over Exceptionally Broad Pressure Range
Abstract
Flexible pressure sensors with a high sensitivity over a broad linear range can simplify wearable sensing systems without additional signal processing for the linear output, enabling device miniaturization and low power consumption. Here, we demonstrate a flexible ferroelectric sensor with ultrahigh pressure sensitivity and linear response over an exceptionally broad pressure range based on the material and structural design of ferroelectric composites with a multilayer interlocked microdome geometry. Due to the stress concentration between interlocked microdome arrays and increased contact area in the multilayer design, the flexible ferroelectric sensors could perceive static/dynamic pressure with high sensitivity (47.7 kPa –1, 1.3 Pa minimum detection). In addition, efficient stress distribution between stacked multilayers enables linear sensing over exceptionally broad pressure range (0.0013–353 kPa) with fast response time (20 ms) and high reliability over 5000 repetitive cycles even at an extremely high pressure of 272 kPa. Our sensor can be used to monitor diverse stimuli from a low to a high pressure range including weak gas flow, acoustic sound, wrist pulse pressure, respiration, and foot pressure with a single device.
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Metadata
- Authors
- Lee, Y., Park, J., Cho, S., Shin, Y.-E., Lee, H., Kim, J., Myoung, J., Cho, S., Kang, S., Baig, C., & Ko, H.
- Venue
- ACS Nano
- Publisher
- American Chemical Society (ACS)
- Published
- 2018-04-12
- Volume
- 12
- Issue
- 4
- Pages
- 4045-4054
- ISSN
- 1936-0851 (ISSN-L)
- 1936-086X
- OpenAlex
- W2797836587
- Cited by
- 528
- References
- 47
- FWCI
- 17.08
- Type
- journal article
- Language
- en
- Open access
- closed
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