Dual-comb spectroscopy of ammonia formation in non-thermal plasmasPlasma-activated chemical transformations promise the efficient synthesis of salient chemical products. However, the reaction pathways that lead to desirable products are often unknown, and key quantum-state-resolved information regarding the involved molecular species is lacking. Here we use quantum cascade laser dual-comb spectroscopy (QCL-DCS) to probe plasma-activated NH3 generation with rotational and vibrational state resolution, quantifying state-specific number densities via broadband spectral analysis. The measurements reveal unique translational, rotational and vibrational temperatures for NH3 products, indicative of a highly reactive, non-thermal environment. Ultimately, we postulate on the energy transfer mechanisms that explain trends in temperatures and number densities observed for NH3 generated in low-pressure nitrogen-hydrogen (N2–H2) plasmas. This dataset provides the supplementary data to the published article.

]]>plasma-activated NH3 generationquantum cascade laser dual-comb spectroscopyPlasma Chemical Processes229a7e48-1c72-4ee0-9223-af045205a5bc2024-05-22T10:22:38+02:002024-05-22T16:38:17+02:00enINP, IRsweep AG, NIST Material Measurement Laboratory, TU/e Department of Applied Physics and Science Education, ASMLDual-comb spectroscopy of ammonia formation in non-thermal plasmas - supplementary data 1This archive contains a bundle of 27 .csv files, corresponding to 27 experiments performed at different H2 flow fraction, PhiH2. The name of each .csv file corresponds to the gas mixing ratio. For example, a file named 'PhiH2_00.04' corresponds to a hydrogen flow fraction (PhiH2) of 0.04. Each .csv file includes: [1] the initial value (Initial); [2] the drawing distribution (DrawDist); [3] the final fit value (Fit); [4] the standard deviation (StDev); and [5] the unit (Unit) for each fit parameter used in the fitting routine and the Monte Carlo simulation for uncertainty evaluation.

]]>2024-05-22T10:18:17+02:002024-05-22T16:36:17+02:00application/zipzip9820https://gitlab.inptdat.de/dataset/dual-comb-spectroscopy-ammonia-formation-non-thermal-plasmas/resource/f77f965c-6cc2-49afDual-comb spectroscopy of ammonia formation in non-thermal plasmas - supplementary data 2This archive contains 4 lists of transition frequency adjustments applied to transition frequencies in the HITRAN2020 database for:
(1) Fundamental band transitions of 14NH3 ('14NH3 fundamental (v2 - v0)')
(2) Hot band transition A of 14NH3 ('14NH3 hotband A (2v2 – v2)')
(3) Hot band transitions E of 14NH3 (14NH3 hotband (v2 + v4 – v4)')
(4) Fundamental band transitions of 15NH3 ('15NH3 fundamental (v2 - v0)')

]]>2024-05-22T10:19:33+02:002024-05-22T16:36:17+02:00application/zipzip2912https://gitlab.inptdat.de/dataset/dual-comb-spectroscopy-ammonia-formation-non-thermal-plasmas/resource/cd8de630-224d-4d56DKANhttps://gitlab.inptdat.de