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사회과학
자연과학
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예술체육학
복합학
DBpia AI
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AI 아이디어
AI 리더
AI 뷰어
Citeasy
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이용수
초록· 키워드
Acetone, a metabolite detected from the exhaled breath of people doing a diet, can be used for non-invasive monitoring of diet efficiency. Thus, gas sensors with rapid response and recovery characteristics to acetone need to be developed. Herein, we report ultrafast acetone sensors using Cedoped In₂O₃ nanoparticles prepared by the one-pot microwave-assisted hydrothermal method. The pure In₂O₃ sensor shows a high response and fast response time (τ<SUB>res</SUB> = 6 s) upon exposure to 2 ppm acetone at 300 ℃, while exhibiting a relatively sluggish recovery speed (τ<SUB>reco</SUB>v = 1129 s). When 20 wt% Ce is doped, the τrecov of the sensor significantly decreased to 45 s withholding the fast-responding characteristic (τ<SUB>res</SUB> = 6 s). In addition, the acetone response (resistance ratio, S) of the sensor is as high as 5.8, sufficiently high to detect breath acetone. Moreover, the sensor shows similar acetone sensing characteristics even under a highly humid condition (relative humidity of 60%) in terms of τ <SUB>res</SUB> (6 s), τ<SUB>reco</SUB>v (47 s), and S (4.7), demonstrating its high potential in real applications. The excellent acetone sensing characteristics of Ce-doped In₂O₃ nanoparticles are discussed in terms of their size, composition, phase, and oxygen adsorption on the sensing surface.
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목차
- Abstract
- 1. Introduction
- 2. Experimental
- 3. Results
- 4. Conclusion
- References
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UCI(KEPA) : I410-151-24-02-089243483
