Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/162267
Title: Sustainable-macromolecule-assisted preparation of cross-linked, ultralight, flexible graphene aerogel sensors toward low-frequency strain/pressure to high-frequency vibration sensing
Authors: Zeng, Zhihui
Wu, Na
Yang, Weidong
Xu, Hao
Liao, Yaozhong
Li, Chenwei
Luković, Mirko
Yang, Yunfei
Zhao, Shanyu
Su, Zhongqing
Lu, Xuehong
Keywords: Engineering::Materials
Issue Date: 2022
Source: Zeng, Z., Wu, N., Yang, W., Xu, H., Liao, Y., Li, C., Luković, M., Yang, Y., Zhao, S., Su, Z. & Lu, X. (2022). Sustainable-macromolecule-assisted preparation of cross-linked, ultralight, flexible graphene aerogel sensors toward low-frequency strain/pressure to high-frequency vibration sensing. Small, 18(24), e2202047-. https://dx.doi.org/10.1002/smll.202202047
Project: 1521200077
Journal: Small
Abstract: Ultralight and highly flexible aerogel sensors, composed of reduced graphene oxide cross-linked by sustainable-macromolecule-derived carbon, are prepared via facile freeze-drying and thermal annealing. The synergistic combination of cross-linked graphene nanosheets and micrometer-sized honeycomb pores gives rise to the exceptional properties of the aerogels, including superior compressibility and resilience, good mechanical strength and durability, satisfactory fire-resistance, and outstanding electromechanical sensing performances. The corresponding aerogel sensors, operated at an ultralow voltage of 0.2 V, can efficiently respond to a wide range of strains (0.1-80%) and pressures (13-2750 Pa) even at temperatures beyond 300 °C. Moreover, the ultrahigh-pressure sensitivity of 10 kPa-1 and excellent sensing stability and durability are accomplished. Strikingly, the aerogel sensors can also sense the vibration signals with ultrahigh frequencies of up to 4000 Hz for >1 000 000 cycles, significantly outperforming those of other sensors. These enable successful demonstration of the exceptional performance of the cross-linked graphene-based biomimetic aerogels for sensitive monitoring of mechanical signals, e.g., acting as wearable devices for monitoring human motions, and for nondestructive monitoring of cracks on engineering structures, showing the great potential of the aerogel sensors as next-generation electronics.
URI: https://hdl.handle.net/10356/162267
ISSN: 1613-6810
DOI: 10.1002/smll.202202047
Rights: © 2022 Wiley-VCH GmbH. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:MSE Journal Articles

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