An ultrahigh sensitivity micro-cliff graphene wearable pressure sensor made by instant flash light exposure
| Autor: | David Mesa, Han Lin, Baohua Jia, Yachu Zhang, Xiaodong Huang, Alan Kin Tak Lau, Yuejin Zhao, Huai Liu, Fei Meng, Huihui Zhang, Tianyi Ma |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
business.industry Graphene Flashlight Wearable computer Response time 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Pressure sensor 0104 chemical sciences Working range law.invention Flash (photography) law Optoelectronics General Materials Science 0210 nano-technology business Sensitivity (electronics) |
| Zdroj: | Nanoscale. 13:15380-15393 |
| ISSN: | 2040-3372 2040-3364 |
| DOI: | 10.1039/d1nr04333a |
| Popis: | Wearable and highly sensitive pressure sensors are of great importance for robotics, health monitoring and biomedical applications. For simultaneously achieving high sensitivity within a broad working range, fast response time (within a few milliseconds), minimal hysteresis and excellent cycling stability are critical for high performance pressure sensors. However, it remains a major challenge. Herein, we report a conceptual micro-cliff design of a graphene sensor with a record high sensitivity of up to 72 568 kPa−1 in a broad working range of 0–255 kPa, which is one order of magnitude higher than the state-of-the-art reported sensitivity. In addition, the detection limit can be as low as 0.35 Pa and the fast response time is less than 5 ms. The sensor also has a minimal hysteresis and an outstanding cycling stability of 5000 cycles, all of which meet the requirements of an ideal pressure sensor. More interestingly, the micro-cliff graphene sensor is made by the fast and scalable flash reduction of graphene oxide using a single flashlight pulse within 150 ms and has been integrated into a wearable smart insole and an E-glove prototype for demonstration of health monitoring applications. This micro-cliff graphene pressure sensor achieves record-high sensitivity, which brings new possibilities in sensor research and promises broad applications. |
| Databáze: | OpenAIRE |
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