Flexible and transparent strain sensors based on super-aligned carbon nanotube films
Flexible and transparent strain sensors based on super-aligned carbon nanotube films
复制标题
基于超排列碳纳米管薄膜的柔性透明应变传感器
DOI：
10.1039/c6nr09961k
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发表时间：
2017
期刊：
影响因子：
6.7
通讯作者：
Wang Jiaping
中科院分区：
文献类型：
--
作者：
Yu Yang;Luo Yufeng;Guo Alex;er;Yan Lingjia;Wu Yang;Jiang Kaili;Li Qunqing;Fan Shoushan;Wang Jiaping
通过在聚二甲基硅氧烷（PDMS）衬底上直接涂覆超取向碳纳米管（SACNT）薄膜，制备了高度柔性和透明的应变传感器。该方法工艺简单、成本低、易于工业化生产。SACNT/PDMS应变传感器具有400%的高传感范围、小于98 ms的快速响应以及400%应变时4%的低蠕变。SACNT/PDMS应变传感器可承受400%应变下的5000次拉伸-释放循环。此外，SACNT/PDMS应变传感器是透明的，在550 nm处具有80%的透射率。原位显微观察表明，SACNT膜在拉伸和释放过程中表面形貌发生可逆变化，因此其电导率在加载-卸载循环后能够完全恢复到初始值。SACNT/PDMS应变传感器具有传感范围宽、响应速度快、蠕变低、透明性好、耐久性好等优点，因此在可穿戴设备中显示出巨大的潜力，可以在不影响设备外观的情况下监测快速和大范围的运动。
Highly flexible and transparent strain sensors are fabricated by directly coating super-aligned carbon nanotube (SACNT) films on polydimethylsiloxane (PDMS) substrates. The fabrication process is simple, low cost, and favorable for industrial scalability. The SACNT/PDMS strain sensors present a high sensing range of 400%, a fast response of less than 98 ms, and a low creep of 4% at 400% strain. The SACNT/PDMS strain sensors can withstand 5000 stretching–releasing cycles at 400% strain. Moreover, the SACNT/PDMS strain sensors are transparent with 80% transmittance at 550 nm. In situ microscopic observation clarifies that the surface morphology of the SACNT film exhibits a reversible change during the stretching and releasing processes and thus its electrical conductance is able to fully recover to the original value after the loading–unloading cycles. The SACNT/PDMS strain sensors have the advantages of a wide sensing range, fast response, low creep, transparency, and excellent durability, and thus show great potential in wearable devices to monitor fast and large-scale movements without affecting the appearance of the devices.