Journal
SMALL
Volume 15, Issue 13, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201804779
Keywords
chemical resistance; pressure sensors; reduced graphene oxide aerogel; reduced graphene oxide paper
Categories
Funding
- National Key R&D Program of China [2018YFA0208402]
- National Natural Science Foundation of China [11634014, 51172271, 51372269]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDA09040202]
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An all-carbon pressure sensor is designed and fabricated based on reduced graphene oxide (rGO) nanomaterials. By sandwiching one layer of superelastic rGO aerogel between two freestanding high-conductive rGO thin papers, the sensor works based on the contact resistance at the aerogel-paper interfaces, getting rid of the alien materials such as polymers and metals adopted in traditional sensors. Without the limitation of alien materials, the all-carbon sensors demonstrate an ultrawide detecting range (0.72 Pa-130 kPa), low energy consumption (approximate to 0.58 mu W), ultrahigh sensitivity (349-253 kPa(-1)) at low-pressure regime (<1.4 Pa), fast response time (8 ms at 1 kPa), high stability (10 000 unloading-loading cycles between 0 and 1 kPa), light weight (<10 mg), easily scalable fabrication process, and excellent chemical stability. These merits enable them to detect real-time human physiological signals and monitor the weights of various droplets of not only water but also hazardous chemical reagents including strong acid, strong alkali, and organic solvents. This shows their great potential applications in real-time health monitoring, sport performance detecting, harsh environment-related robotics and industry, and so forth.
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