| 1 | A flexible and wearable NO_(2)gas detection and early warning device based on a spraying process and an interdigital electrode at room temperature显示文摘Flexible sensors used to detect NO_(2) gas generally have problems such as poor repeatability,high operating temperature,poor selectivity,and small detection range.In this work,a new spraying platform with a simple structure,low cost,and good film-forming consistency was designed and built to make a sensitive film(rGO/SnO_(2))for NO_(2) gas sensors.The relationship between the solid content of rGO and SnO_(2)nanoparticles,annealing temperature,and sensor performance was studied.The results show that the interdigital electrode-sensitive film formed by spraying 0.25 ml of a 0.4 wt%rGO/SnO_(2)mixture and annealing at 250℃exhibited the best comprehensive performance for NO_(2) detection.The sensor's response value for 100 ppm NO_(2) gas was 0.2640 at room temperature(25℃),and the response time and recovery time were 412.4 s and 587.3 s,respectively.In the range of 20-100 ppm,the relationship between the response and NO_(2) concentration was linear,and the correlation coefficient was 0.9851.In addition,a soft-monitoring node module with an overlimit warning function for NO_(2) gas was designed and manufactured based on flexible electronics.Finally,the flexible sensor and node module were embedded into woven fabric that could be used to make a mask or a watch that could detect NO_(2) gas,realizing the practical application of flexible NO_(2) gas sensors in the field of wearable electronics. | Fuzheng Zhang Qijing Lin Feng Flan Zuowei Wang Bian Tian Libo Zhao Tao Dong Zhuangde Jiang | 2022 | Microsystems & Nanoengineering2022，8，2： | 1 |
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