CuO nanostructure-based flexible humidity sensors fabricated on PET substrates by spin-spray method
CuO nanostructure-based flexible humidity sensors fabricated on PET substrates by spin-spray method
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DOI：
10.1016/j.apsusc.2021.151352
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发表时间：
2021-10-01
影响因子：
6.7
通讯作者：
Matsushita, Nobuhiro
中科院分区：
文献类型：
--
作者：
Nitta, Ryosuke;Lin, Hwai-En;Matsushita, Nobuhiro
采用旋喷法，使用不同的络合剂在柔性聚对苯二甲酸乙二醇酯上制备了地毯状和草状排列的CuO纳米片。CuO纳米结构牢固地附着在衬底上，所得到的涂层衬底具有足够的柔性，可以在弯曲状态下用作湿度传感器。通过在室温下将传感器暴露在相对湿度为20-90%的环境中来评价其感湿性能。基于地毯状CuO纳米片的传感器没有表现出任何湿度响应。草状CuO纳米片具有良好的湿敏性能，其线性电阻行为、响应时间和恢复时间分别为2.1 S和2.8 S，灵敏度高达170%。此外，基于纳米薄片的传感器具有很高的稳定性和抗机械弯曲的耐久性。当弯曲角度为90度时，在1000次弯曲-松弛循环后，灵敏度、响应时间和恢复时间几乎没有变化。
Carpet-like and grass-like arranged CuO nanosheets were fabricated on flexible polyethylene terephthalate substrates via the spin-spray method using different complexing agents. The CuO nanostructures strongly adhered to the substrate, and the resulting coated substrates were sufficiently flexible to be used as humidity sensors in a bent state. The humidity-sensing properties were evaluated by exposing the sensors to 20-90% relative humidity at room temperature. The sensor based on the carpet-like CuO nanosheets did not exhibit any humidity response. The grass-like CuO nanosheets had excellent humidity-sensing performance as evidenced by the linear resistance behavior, short response and recovery times of 2.1 s and 2.8 s, respectively, and high sensitivity of up to 170%. In addition, the sensor based on the nanosheets possessed high stability and durability against mechanical bending. The sensitivity and response and recovery times were almost unchanged even when the bending angle was 90 degrees and after 1000 bending-relaxation cycles.