Confinement-induced infrared absorption by H2 and N2 gases in a porous silica aerogel
| Autor: | C. Boulet, Y. Carré, Jean-Michel Hartmann, J. Vander Auwera, L. Kocon |
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| Přispěvatelé: | Institut des Sciences Moléculaires d'Orsay (ISMO), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA (UMR_7583)), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) |
| Rok vydání: | 2016 |
| Předmět: |
Infrared absorption
Radiation Materials science H2 and N2 gases Porous silica aerogel Infrared spectroscopy Aerogel 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Molecular physics Atomic and Molecular Physics and Optics Spectral line Dipole Adsorption [SDU]Sciences of the Universe [physics] 0103 physical sciences Molecule Physics::Chemical Physics Absorption (chemistry) 010306 general physics 0210 nano-technology Porosity Surface-induced absorption Spectroscopy |
| Zdroj: | Journal of Quantitative Spectroscopy and Radiative Transfer Journal of Quantitative Spectroscopy and Radiative Transfer, 2016, 182, pp.193-198. ⟨10.1016/j.jqsrt.2016.05.032⟩ |
| ISSN: | 0022-4073 |
| Popis: | International audience; Transmission spectra in the fundamental bands of H2 and N2 gas inside the pores of a silica aerogel sample were recorded at room temperature and for several pressures using a Fourier transform spectrometer. They first show that, as the absorption is proportional to the pressure, it is due to the interactions of the molecules with the inner surfaces of the pores and not to the dipole induced during gas-phase molecule-molecule collisions. Furthermore, the analysis of the widths and areas of the observed absorption structures indicate that, for the considered aerogel sample, most of the absorption is likely due to "free" molecules moving within the pores with a weak contribution of adsorbed molecules. |
| Databáze: | OpenAIRE |
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