Exobiologie et Astrobiologie

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Proposition de stage Master ou Ingénieur (5 mois, Février-Juin 2022)


Stage à pouvoir dès que possible. Pour candidater, envoyer une lettre de motivation et un CV à thierry.tassaing@u-bordeaux.fr. La.Le candidat.e sera sélectionné.e après entretien oral.

Equipe d’accueil: Groupe de Spectroscopie Moléculaire (GSM) et de Chimie Organique (ORGA), ISM, UMR 5255 CNRS – Université de Bordeaux, 351, cours de la Libération, 33405 TALENCE
Contact -Encadrant du stage : Dr. Thierry TASSAING Tél : 054000 2892 ; thierry.tassaing@u-bordeaux.fr
Responsables scientifiques: Dr. Thierry TASSAING (thierry.tassaing@u-bordeaux.fr) Dr. Mathieu PUCHEAULT (mathieu.pucheault@u-bordeaux.fr)
Nom du projet : Projet ODEVIE.
Titre/ durée du stage : Millifluidic hydrothermal pump for generating organic molecules from simple gases and vent-related catalytic minerals. Stage de 5 mois (année 2022)
Mots-clés : Hydrothemal vents – High pressure millifluidic- In situ spectroscopy – Catalysis

Description du projet :
Since the discovery around seafloor hot springs on the Galapagos mid-ocean rift that microorganisms could survive under conditions of extreme heat and pressure, it has been proposed that life could have emerged near hydrothermal vents that act as flow reactors, where hydrothermal fluids (supercritical water containing abundant volatiles) and liquid seawater mix and react in vent chimneys composed of finely-grained natural catalytic minerals.[1]
Using a millifluidic low/high temperature-high pressure (LHTHP) cell developed in our laboratory to simulate an hydrothermal vent, this master internship aims at performing experiments using model catalytic minerals containing elements such as Mn, Fe, Zn, Cu with different composition of reactive model gases (e.g. CO2, H2, ..) in order to see the influence of different parameters (gas composition, temperature of the different phase, reaction time, nature of the metal) on the expected formation of abiotic molecules. In-situ infrared/Raman spectroscopies will be implemented on the LHTHP cell to characterize the thermodynamics of the hydrothermal vent simulator. Thus, the proposed Master project will aim at:
Synthesizing metallic clay-based phyllosilicate materials, implement the millifluidic set-up, characterizing the thermo-hydrodynamics of the targeted gas-liquid-supercritical systems and obtaining preliminary results on the expected formation of abiotic molecules.

Profil recherché :
The candidate should have interest in the origin of life with high skills in organic and physical chemistry. He/she have to demonstrate collaborative spirit and curiosity to related fields of this project.
There is a possibility to pursue the M2 internship with a PhD thesis (funding already obtained in the frame of an ANR project)

[1] a) E. Branscomb, M. J. Russell, BioEssays 2018, 40, 1700179, 10.1002/bies.201700179; b) E. Branscomb, M. J. Russell, BioEssays 2018, 40, 1700182, 10.1002/bies.201700182; c) V. Sojo, B. Herschy, A. Whicher, E. Camprubi, N. Lane, Astrobiology 2016, 16, 181-197, 10.1089/ast.2015.1406.



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