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Micropatterned Pyramidal Ionic Gels for Sensing Broad-Range Pressures with High Sensitivity
Abstract
The development of pressure sensors that are effective over a broad range of pressures is crucial for the future development of electronic skin applicable to the detection of a wide pressure range from acoustic wave to dynamic human motion. Here, we present flexible capacitive pressure sensors that incorporate micropatterned pyramidal ionic gels to enable ultrasensitive pressure detection. Our devices show superior pressure-sensing performance, with a broad sensing range from a few pascals up to 50 kPa, with fast response times of <20 ms and a low operating voltage of 0.25 V. Since high-dielectric-constant ionic gels were employed as constituent sensing materials, an unprecedented sensitivity of 41 kPa –1 in the low-pressure regime of <400 Pa could be realized in the context of a metal–insulator–metal platform. This broad-range capacitive pressure sensor allows for the efficient detection of pressure from a variety of sources, including sound waves, a lightweight object, jugular venous pulses, radial artery pulses, and human finger touch. This platform offers a simple, robust approach to low-cost, scalable device design, enabling practical applications of electronic skin.
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Metadata
- Authors
- Cho, S. H., Lee, S. W., Yu, S., Kim, H., Chang, S., Kang, D., Hwang, I., Kang, H. S., Jeong, B., Kim, E. H., Cho, S. M., Kim, K. L., Lee, H., Shim, W., & Park, C.
- Venue
- ACS Applied Materials & Interfaces
- Publisher
- American Chemical Society (ACS)
- Published
- 2017-03-13
- Volume
- 9
- Issue
- 11
- Pages
- 10128-10135
- ISSN
- 1944-8244 (ISSN-L)
- 1944-8252
- OpenAlex
- W2593635697
- Cited by
- 369
- References
- 37
- FWCI
- 12.92
- Type
- journal article
- Language
- en
- Open access
- closed
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