アクセス数 : ?
ダウンロード数 : ?
ID 112320
著者
謝, 宜達 Tokushima University|JST
Nakamura, Shota Tokushima University
Abdelsalam, Dahi Ghareab Tokushima University|JST
山本, 裕紹 JST|Utsunomiya University KAKEN研究者をさがす
Hindle, Francis Université du Littoral Côte d’Opale
資料タイプ
学術雑誌論文
抄録
Terahertz (THz) spectroscopy is a promising method for analysing polar gas molecules mixed with unwanted aerosols due to its ability to obtain spectral fingerprints of rotational transition and immunity to aerosol scattering. In this article, dynamic THz spectroscopy of acetonitrile (CH3CN) gas was performed in the presence of smoke under the atmospheric pressure using a fibre-based, asynchronous-optical-sampling THz time-domain spectrometer. To match THz spectral signatures of gas molecules at atmospheric pressure, the spectral resolution was optimized to 1 GHz with a measurement rate of 1 Hz. The spectral overlapping of closely packed absorption lines significantly boosted the detection limit to 200 ppm when considering all the spectral contributions of the numerous absorption lines from 0.2 THz to 1 THz. Temporal changes of the CH3CN gas concentration were monitored under the smoky condition at the atmospheric pressure during volatilization of CH3CN droplets and the following diffusion of the volatilized CH3CN gas without the influence of scattering or absorption by the smoke. This system will be a powerful tool for real-time monitoring of target gases in practical applications of gas analysis in the atmospheric pressure, such as combustion processes or fire accident.
掲載誌名
Scientific Reports
ISSN
20452322
出版者
Springer Nature
6
開始ページ
28114
発行日
2016-06-15
備考
Supplementary Information : srep_6_28114_s1.pdf
Supplementary Video : srep_6_28114_s2.mov
権利情報
This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
EDB ID
出版社版DOI
出版社版URL
フルテキストファイル
言語
eng
著者版フラグ
出版社版
部局
理工学系