Ultrasensitive Ionic Liquid Polymer Composites with a Convex and Wrinkled Microstructure and Their Application as Wearable Pressure Sensors
- Authors
- Cho, Changwoo; Kim, Dongwon; Lee, Chaeeun; Oh, Je Hoon
- Issue Date
- Mar-2023
- Publisher
- American Chemical Society
- Keywords
- capacitive pressure sensor; ionic liquid; polymer composite; electrical double layer (EDL); wearable devices; wrinkled microstructure; healthcare monitoring
- Citation
- ACS Applied Materials & Interfaces, v.15, no.10, pp 13625 - 13636
- Pages
- 12
- Indexed
- SCIE
SCOPUS
- Journal Title
- ACS Applied Materials & Interfaces
- Volume
- 15
- Number
- 10
- Start Page
- 13625
- End Page
- 13636
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/112584
- DOI
- 10.1021/acsami.2c22825
- ISSN
- 1944-8244
1944-8252
- Abstract
- The development of pressure sensors with high sensitivity and effectiveness that exhibit linearity over a wide pressure range is crucial for wearable devices. In this study, we fabricated a novel ionic liquid (IL)/polymer composite with a convex and randomly wrinkled microstructure in a cost-effective and facile manner using an opaque glass and stretched polydimethylsiloxane template. The fabricated IL/polymer composite was used as the dielectric layer in a capacitive pressure sensor. The sensor exhibited a high linear sensitivity of 56.91 kPa-1 owing to the high interfacial capacitance formed by the electrical double layer of the IL/ polymer composite over a relatively wide range (0-80 kPa). We also demonstrated the sensor performance for various applications such as a glove-attached sensor, sensor array, respiration monitoring mask, human pulse, blood pressure measurement, human motion detection, and a wide range of pressure sensing. It would be expected that the proposed pressure sensor has sufficient potential for use in wearable devices.
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