Gas sensing for industrial relevant nitrogen-containing compounds using a microelectronics-based absorption spectrometer in the 220–330 GHz frequency range
Gas sensing for industrial relevant nitrogen-containing compounds using a microelectronics-based absorption spectrometer in the 220–330 GHz frequency range
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使用基于微电子的吸收光谱仪在 220-330 GHz 频率范围内对工业相关的含氮化合物进行气体传感
DOI：
10.1016/j.snb.2022.132030
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Oehlschlaeger, Matthew A.
中科院分区：
文献类型：
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作者：
Rice, Timothy E.;Arshad Zahangir Chowdhury, M.;Powers, Megan N.;Mansha, Muhammad Waleed;Wilke, Ingrid;Hella, Mona M.;Oehlschlaeger, Matthew A.
对四种含氮化合物（氧化亚氮、乙腈、硝酸和硝基甲烷）的气体传感进行了探索，并使用旋转吸收光谱进行了演示，该光谱采用紧凑的太赫兹波微电子光谱仪，工作在220-330 GHz频率范围内。所研究的四种气体在工业过程中，以及在化学，燃烧，环境和农业环境中都很重要。吸收测量是在室温（297 K）和中等压力（33.3-2133 Pa或0.25-16 Torr）下进行的，用于表征由不同指纹特征组成的光谱，包括孤立的单跃迁和压力加宽的跃迁带，从地面振动状态和低洼振动激发态发出。测量结果表明，使用全电子小型化系统的太赫兹波定量气体传感可以用于检测限为1012-1013分子cm - 3 /米程长的含氮化合物，以及浓度为5 - 1000ppm /米程长的1atm空气中的稀释气体。
Gas sensing for four nitrogen-containing compounds (nitrous oxide, acetonitrile, nitric acid, and nitromethane) is explored and demonstrated using rotational absorption spectroscopy carried out with a compact terahertz-wave microelectronics-based spectrometer operating in the 220–330 GHz frequency range. The four gases investigated are important in industrial processes, as well as in chemical, combustion, environmental, and agricultural contexts. Absorption measurements were made at room temperature (297 K) and moderate pressures (33.3–2133 Pa or 0.25–16 Torr) for the characterization of spectra that are comprised of distinct fingerprint features that include isolated single transitions and bands of pressure-broadened transitions, emanating from both ground vibrational states, as well as low-lying vibrationally-excited states. The measurements demonstrate that terahertz-wave quantitative gas sensing using all-electronic miniaturized systems is possible for nitrogen-containing compounds with detection limits of the order 1012-1013molecules cm−3per meter pathlength and for dilute gases in air at 1 atm at concentrations of 5–1000 ppm per meter pathlength.