Fabrication of multiwall carbon nanotube sheet based hydrogen sensor on a stacking multi-layer structure
Fabrication of multiwall carbon nanotube sheet based hydrogen sensor on a stacking multi-layer structure
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DOI：
10.1088/1361-6528/aace96
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发表时间：
2018-07
期刊：
影响因子：
3.5
通讯作者：
Keyi Yan;Yuhki Toku;Y. Morita;Y. Ju
中科院分区：
文献类型：
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作者：
Keyi Yan;Yuhki Toku;Y. Morita;Y. Ju
在本研究中，我们提出了一种新的简单的方法来制作氢气传感器堆叠多壁碳纳米管（MWCNT）片。多壁碳纳米管片提供了更大的表面积和更多的碳纳米管接触，这是气体传感的关键因素，因为与传统的碳纳米管膜相比，它们具有超高的对准性和端到端的结构。此外，多壁碳纳米管片材可以直接从可纺的碳纳米管阵列大规模拉伸。因此，这种方法是一个潜在的解决方案的大规模生产和商业化的碳纳米管基传感器具有高响应度。通过以各种排列方式堆叠片材层，改变了层中的微观结构和CNT相互作用，并研究了它们对气敏的影响。实验结果表明，三层片状结构的样品在4%H2下的响应率为12.31%，响应时间小于200 s，具有最佳的气敏性能。
In this research, we propose a new simple method to fabricate hydrogen gas sensors by stacking multiwall carbon nanotube (MWCNT) sheets. MWCNT sheets offer a larger surface area and more CNT contact, which are key factors for gas sensing, because of their super-high alignment and end-to-end structure compared to traditional CNT film. Besides, MWCNT sheets can be directly drawn from spinnable CNT arrays on large scales. Therefore, this method is a potential answer for the mass production and commercialization of CNT-based sensors with high responsivity. By stacking layers of sheets in various arrangements, the microstructure and CNT interactions in the layers were changed and their influence on gas sensing investigated. It was observed that the sample with three layers of sheet and functionalized with 3 nm thick Pd showed the best gas sensing performance, with a response of 12.31% at 4% H2 and response time below 200 s.