Analogues of Titan's aerosols: the different steps of formation in a N2-CH4 plasma
Résumé
Observations by the Cassini mission show the presence of aerosols in Titan's atmosphere. According to models, these aerosols should reside there during several years. A plasma reactor is used to simulate the production of aerosols in the upper atmosphere of Titan. Five productions of aerosols were carried out with different residence times in the plasma, corresponding to different stages of evolution. These analogues were then analyzed by electron microscopy and infrared spectroscopy. Our results show that aerosols undergo morphological evolution in time. They grow and start forming aggregates at a certain stage. In addition, we also observed evolutions of the chemical functions present in the aerosols of different formation times.
Domaines
Planète et Univers [physics]| Origine | Fichiers éditeurs autorisés sur une archive ouverte |
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