NDLI: Detection of hazardous vapors including mixture in different conditions using surface acoustic wave device array

Content Provider	IEEE Xplore Digital Library
Author	Hsu-Chao Hao Ming-Chang Chiang Da-Jeng Yao
Copyright Year	2014
Description	Author affiliation: Inst. of Power Mech. & Eng., Nat. Tsing Hua Univ., Hsinchu, Taiwan (Ming-Chang Chiang) \|\| Inst. of NanoEngineering & Microsyst., Nat. Tsing Hua Univ., Hsichu, Taiwan (Hsu-Chao Hao; Da-Jeng Yao)
Abstract	In this research, a surface acoustic wave (SAW) sensor was used for chemical compounds detection such as ammonia, methane, and ammonia/methane mixture gases. The detection results of ammonia/methane mixture gases by polymer deposited on 128° $YX-LiNbO_{3}$ SAW delay lines were presented. To enhance the sensitivity and accuracy of the surface acoustic wave sensors, the sensing chamber and polymer films was improved. Very low concentration of ammonia (~250 ppb) and methane(~9 ppm) could be detected by this SAW sensor. From the sensing database of ammonia and methane, we Figured out that the frequency shift of ammonia/methane mixtures was equal to the sum of frequency shift of ammonia and methane. Besides, the signal loss of ammonia was much stronger than methane in high relative humidity conditions. Here, superposition effect between ammonia and methane sensing signals could be used for the signal intensity prediction of different concentrations ammonia/methane mixture gases.
Starting Page	38
Ending Page	41
File Size	811720
Page Count	4
File Format	PDF
ISBN	9781479947263
DOI	10.1109/NEMS.2014.6908754
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-04-13
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Gases Humidity Surface acoustic waves Surface acoustic wave devices Sensors Optical surface waves Films
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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