High-density, highly sensitive sensor array of spiky carbon nanospheres for strain field mapping

Shuxing Mei, Haokun Yi, Jun Zhao, Yanting Xu, Lan Shi, Yajie Qin, Yizhou Jiang, Jiajie Guo, Zhuo Li () and Limin Wu ()
Additional contact information
Shuxing Mei: 220 Handan Rd.
Haokun Yi: 220 Handan Rd.
Jun Zhao: 220 Handan Rd.
Yanting Xu: 220 Handan Rd.
Lan Shi: 220 Handan Rd.
Yajie Qin: 220 Handan Rd.
Yizhou Jiang: 220 Handan Rd.
Jiajie Guo: Huazhong University of Science and Technology
Zhuo Li: 220 Handan Rd.
Limin Wu: 220 Handan Rd.

Nature Communications, 2024, vol. 15, issue 1, 1-11

Abstract: Abstract While accurate mapping of strain distribution is crucial for assessing stress concentration and estimating fatigue life in engineering applications, conventional strain sensor arrays face a great challenge in balancing sensitivity and sensing density for effective strain mapping. In this study, we present a Fowler-Nordheim tunneling effect of monodispersed spiky carbon nanosphere array on polydimethylsiloxane as strain sensor arrays to achieve a sensitivity up to 70,000, a sensing density of 100 pixel cm−2, and logarithmic linearity over 99% within a wide strain range of 0% to 60%. The highly ordered assembly of spiky carbon nanospheres in each unit also ensures high inter-unit consistency (standard deviation ≤3.82%). Furthermore, this sensor array can conformally cover diverse surfaces, enabling accurate acquisition of strain distributions. The sensing array offers a convenient approach for mapping strain fields in various applications such as flexible electronics, soft robotics, biomechanics, and structure health monitoring.

Date: 2024
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DOI: 10.1038/s41467-024-47283-8

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