Electronic nano sponge breath ammonia sensors using hygroscopic polymers on vertical channel nano-porous structure

Wei Lun Chen, Huang Cheng Chiu, Hsuan Chu, Ju Chun Hsieh, Bing Xin Chen, Ya Chun Tian, Shuh Kuan Liau, Ming Jen Chan, Chia Jung Lu, Hsin Fei Meng, Sheng Fu Horng*, Chien Lung Wang, Hsiao Wen Zan

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

摘要

In this work, insulating hygroscopic polymer thin films have been applied as the vertical-channel sensing layer of extremely sensitive ammonia sensors to detect 5-1000 ppb ammonia. Hygroscopic polymers such as poly(ethylene glycol) (PEG), polyvinyl alcohol (PVA), and poly(acrylic acid) (PAA) serve as good absorbents of ammonia gas. The high-density nano-porous structure covered by a hygroscopic thin film acted like a nano-porous sponge (Nano Sponge) to absorb water, which forms an ionic conduction path in the 300 nm vertical channels. The influences of the polymer functional groups, pH value, relative humidity (RH), and other interfering gas analytes on the sensing performances of theNano Spongesensors have also been investigated. After adding glycerol, the Glycerol/PEGNano Spongesensors exhibited a stable response. Breath detection in a healthy group and a chronic kidney group of patients was examined using the Glycerol/PEGNano Spongesensor in a sensing system with a NaOH tube to control the relative humidity and to absorb the interfering species such as CO and H2S.

原文英語
頁(從 - 到)12938-12950
頁數13
期刊Journal of Materials Chemistry C
9
發行號37
DOIs
出版狀態已發佈 - 2021 10月 7

ASJC Scopus subject areas

  • 化學 (全部)
  • 材料化學

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