Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 235, Issue -, Pages 474-480Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2016.05.100
Keywords
Graphene; Reduced graphene oxide; Microcavity integrated; Total internal reflection; Ultrasensitive gas sensing; Multi-parameter gas sensing
Funding
- National Natural Science Foundation of China [61138003, 61427819, 61505109]
- Ministry of Science and Technology of China [2015CB352004]
- Science and Technology Innovation Commission of Shenzhen [KQCS2015032416183980, JCYJ20140418091413543]
- leading talents of Guangdong province program [00201505]
- China Postdoctoral Science Foundation [2015M570721]
- Shenzhen University
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An ultra-high sensitivity, multi-parameter monitoring system was established based on a 1.8 mm(3), high-temperature-reduced graphene oxide microcavity. The gas refractive index, pressure, velocity and flux can be detected in real time based on polarization-sensitive absorption of graphene, and the detection limits are 1.1 x 10(-8) RIU (refractive index units), 3.5 Pa, 3.5 mm/s, and 0.1 ml/min respectively, with an experimental response time less than 0.5 s. These results are a great improvement over those measured previously with single-parameter sensors. Furthermore, the system can also recognize gas flow direction accurately, and enable applications for extreme conditions and for precision instruments with microcavity integrated. (C) 2016 Elsevier B.V. All rights reserved.
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