Improvement of Piezoresistive Properties of Suspended Single‐Walled Carbon Nanotube Arrays via Selective Trimming

Zheng, Fuzhong; Hu, Guangzhong; Liu, Zhongbin; Wu, Chunxiao; Zhang, Jie; Yang, Xing; Zhou, Zhaoying; Wu, Ying; Kuang, Shuangyang

doi:10.1002/aelm.201800992

Cited by 1 publication

(1 citation statement)

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“…The relative resistance of the sensor increases as the applied strain increases. The sensitivity of the strain sensor can be expressed by gauge factor (GF), which can be calculated by the following formula: GF = (∆R/R 0 )/ε, where R 0 and ε represent the initial resistance and the applied strain, respectively [ 41 ]. During the stretching process of the sensor, the SFG sensor can show an excellent positive linear resistance change within the 30% strain range, and the maximum GF is 36.2, which is equivalent to the newly reported printed strain sensor [ 42 ].…”

Section: Resultsmentioning

confidence: 99%

Near-Linear Responsive and Wide-Range Pressure and Stretch Sensor Based on Hierarchical Graphene-Based Structures via Solvent-Free Preparation

et al. 2020

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Flexible and wearable electronics have huge potential applications in human motion detection, human–computer interaction, and context identification, which have promoted the rapid development of flexible sensors. So far the sensor manufacturing techniques are complex and require a large number of organic solvents, which are harmful not only to human health but also to the environment. Here, we propose a facile solvent-free preparation toward a flexible pressure and stretch sensor based on a hierarchical layer of graphene nanoplates. The resulting sensor exhibits many merits, including near-linear response, low strain detection limits to 0.1%, large strain gauge factor up to 36.2, and excellent cyclic stability withstanding more than 1000 cycles. Besides, the sensor has an extraordinary pressure range as large as 700 kPa. Compared to most of the reported graphene-based sensors, this work uses a completely environmental-friendly method that does not contain any organic solvents. Moreover, the sensor can practically realize the delicate detection of human body activity, speech recognition, and handwriting recognition, demonstrating a huge potential for wearable sensors.

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Section: Resultsmentioning

confidence: 99%