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- W4386574071 abstract "A humidity sensor with high performance based on Fe3+ ions doped with SnO2 (Fe/SnO2) was synthesized by hydrothermal method and its mechanism was studied by the first principle based on density functional theory. Experimental results show that doping Fe3+ ions can effectively improve the performance of SnO2 humidity sensor. Compared with SnO2, the resistance of Fe/SnO2 humidity sensor increases from 4.5 to 5.5 orders of magnitude, the humidity hysteresis error decreases from 42.4% to 3.8% and the response/recovery time changes from 11 s/48 s to 10 s/8 s. Calculations show that Fe3+ ions can enhance the chemical and physical adsorption energy, improving the sensitivity and linearity and reducing the hysteresis error and recovery time of SnO2, respectively. Moreover, a simple circuit for respiratory detection was designed based on Fe/SnO2, and the number of LED lights can distinguish different breathing states through resistance changes of the Fe/SnO2 humidity sensor. This study indicate Fe/SnO2 humidity sensor can be used in non-contact and visual breath detection, which has potential applications in preventing respiratory disease." @default.
- W4386574071 created "2023-09-10" @default.
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- W4386574071 date "2023-11-01" @default.
- W4386574071 modified "2023-10-09" @default.
- W4386574071 title "Preparation of high performance Fe-doped SnO2 humidity sensor and its application in respiration detection" @default.
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- W4386574071 doi "https://doi.org/10.1016/j.sna.2023.114644" @default.
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