Vertical Graphene Canal Mesh for Strain Sensing with a Supereminent Resolution.
Vertical Graphene Canal Mesh for Strain Sensing with a Supereminent Resolution.
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DOI：
10.1021/acsami.2c07658
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发表时间：
2022-07
影响因子：
9.5
通讯作者：
Yifei Ma;Zijian Li;Jiemin Han;Linhan Li;Mei Wang;Z. Tong;J. Suhr;Liantuan Xiao;Suotang Jia
中科院分区：
文献类型：
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作者：
Yifei Ma;Zijian Li;Jiemin Han;Linhan Li;Mei Wang;Z. Tong;J. Suhr;Liantuan Xiao;Suotang Jia
微应变传感器的发展在微型机器人、智能人机交互、健康监测、医疗康复等领域具有重要的应用前景。在应变传感器材料中，垂直石墨烯（VG）作为电阻材料已经显示出相当大的潜力;然而，具有高分辨率的基于VG的应变传感器还有待开发。此外，VG的检测机制尚未得到广泛的研究。在此，我们开发了VG canal mesh（VGCM）来制造用于超低应变传感的柔性应变传感器，在0%-4%的总应变范围内实现对低至0.1‰的应变的准确响应。这种低应变的检测是由于VGCM的三维微纳米结构的严格的结构设计和应变集中效应。通过实验结果和理论模拟，阐述了VG中微裂纹的演化规律以及VG和VGCM的传感机理，揭示了VGCM的独特优势。最后，提出了基于VGCM的应变传感器作为快速呼吸检测的便携式呼吸测试设备。
The development of microstrain sensors offers significant prospects in diverse applications, such as microrobots, intelligent human-computer interaction, health monitoring, and medical rehabilitation. Among strain sensor materials, vertical graphene (VG) has demonstrated considerable potential as a resistive material; however, VG-based strain sensors with high resolution are yet to be developed. In addition, the detection mechanism of VG has not been extensively investigated. Herein, we developed a VG canal mesh (VGCM) to fabricate a flexible strain sensor for ultralow strain sensing, achieving an accurate response to strains as low as 0.1‰ within a total strain range of 0%-4%. The detection of such low strains is due to the rigorous structural design and strain concentration effect of the three-dimensional micronano structure of the VGCM. Through experimental results and theoretical simulation, the evolution of microcracks in VG and the sensing mechanism of VG and VGCM are elaborated, and the unique advantages of VGCM are revealed. Finally, the VGCM-based strain sensors are proposed as portable breathing test equipment for rapid breathing detection.