Flexible polymer transistors with high pressure sensitivity for application in electronic skin and health monitoring
Open accessAbstract
Flexible pressure sensors are essential parts of an electronic skin to allow future biomedical prostheses and robots to naturally interact with humans and the environment. Mobile biomonitoring in long-term medical diagnostics is another attractive application for these sensors. Here we report the fabrication of flexible pressure-sensitive organic thin film transistors with a maximum sensitivity of 8.4 kPa(-1), a fast response time of <10 ms, high stability over >15,000 cycles and a low power consumption of <1 mW. The combination of a microstructured polydimethylsiloxane dielectric and the high-mobility semiconducting polyisoindigobithiophene-siloxane in a monolithic transistor design enabled us to operate the devices in the subthreshold regime, where the capacitance change upon compression of the dielectric is strongly amplified. We demonstrate that our sensors can be used for non-invasive, high fidelity, continuous radial artery pulse wave monitoring, which may lead to the use of flexible pressure sensors in mobile health monitoring and remote diagnostics in cardiovascular medicine.
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Capacitive integration uses pressure-sensitive capacitors directly as gate capacitors, translating capacitance change into drain current variation in FET-based devices.
“As shown in Figure 4I, capacitive integration uses primarily pressure-sensitive capacitors directly as gate capacitors, where the change in capacitance is translated into a variation in drain current in the field-effect transistor (FET)-based device.[102,130–132]”
From Flexible Electronics and Devices as Human–Machine Interfaces for Medical Robotics (2022) · cites this paper as [130]
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“2 Wearable and lightweight pressure sensors are essential electronic components in touch displays, electronic skin and wearable health monitors, which require fast response and high sensitivity in the low-pressure regime.(1-9) To achieve these requirements, many technologies based on micro-fabrication processing have…”
BackgroundFlexible Electronics and Devices as Human–Machine Interfaces for Medical Robotics
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Silk Fibroin for Flexible Electronic Devices
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Skin-inspired electronic devices
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InfluentialEmerging Technologies of Flexible Pressure Sensors: Materials, Modeling, Devices, and Manufacturing
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BackgroundA Graphene-Based Resistive Pressure Sensor with Record-High Sensitivity in a Wide Pressure Range
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- Authors
- Schwartz, G., Tee, B. C.-K., Mei, J., Appleton, A. L., Kim, D. H., Wang, H., & Bao, Z.
- Affiliations
- Stanford University (US)
- Soongsil University (KR)
- Corresponding author
- Bao, Zhenan
- Venue
- Nature Communications
- Published
- 2013-05-14
- Volume
- 4
- Issue
- 1
- Pages
- 1859-1859
- ISSN
- 2041-1723 (ISSN-L)
- OpenAlex
- W2069137854
- Semantic Scholar
- abfbaf816234530c2f47e463140b1233db71ecb1
- Cited by
- 2,042
- References
- 48
- Citations by year
- 2026: 52 · 2025: 114 · 2024: 118 · 2023: 139 · 2022: 168 · 2021: 207 · 2020: 200 · 2019: 258 · 2018: 224 · 2017: 200 · 2016: 149 · 2015: 118 · 2014: 79 · 2013: 15
- FWCI
- 66.44
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Licence
- Locations
- Nature Communications (publishedVersion)
- PubMed (publishedVersion)
- RePEc: Research Papers in Economics (submittedVersion)
- Funders
- National Science Foundation (1101901)
- Camille and Henry Dreyfus Foundation
- Deutsche Forschungsgemeinschaft
- Division of Electrical, Communications and Cyber Systems
- Topics
- Physical Sciences › Engineering › Biomedical Engineering › Advanced Sensor and Energy Harvesting Materials
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Organic Electronics and Photovoltaics
- Physical Sciences › Materials Science › Polymers and Plastics › Conducting polymers and applications
- Keywords
- flexible pressure sensors, organic thin-film transistors, electronic skin, subthreshold operation, health monitoring, low power consumption, cycling stability
- MeSH terms
- Adult, Electronics, Medical, Equipment and Supplies, Equipment Design, Health, Humans, Microscopy, Electron, Scanning, Monitoring, Physiologic, Polymers, Pressure, Pulse, Time Factors, Transistors, Electronic, Radial Artery, Pliability
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