UFR de Physique

Propositions de stages en laboratoire -- M2

Les offres sont actualisées en mai. Par exemple, les offres de stages pour l'année universitaire 2015-2016 seront mises en place en mai 2015, les offres de stages pour l'année universitaire 2016-2017 seront mises en place pour en mai 2016, etc.

Spectroscopic investigation of soot particles/bioaerosols and their propensity to activate ice growth in cold and humid atmospheres

  • Option International « Atmospheric Environnement » du parcours Lumière-Matière
  • Laboratoire: Laboratoire de Physique des Lasers, Atomes et Molécules (PhLAM)
  • Responsable du stage: PIRIM Claire (Claire.Pirim@univ-lille1.fr,
  • Co-responsable(s): Jennifer NOBLE
  • Mots clés: soot, micro- Raman spectroscopy, FTIR, nucleation
  • Fiche complète en PDF : Fiche complète en PDF

A 5-month internship is available in the ANATRAC group at the PhLAM laboratory (Physique des Lasers Atomes et Molécules), Univ. Lille (CNRS, UMR 8523), France. The Master’s project will focus on investigating the physicochemical properties of soot and bio aerosol particles using both micro-Raman and Fourier transform infrared spectroscopies. The ability of the particles to activate ice formation may also be studied provided good progress is made on the primary task. In this master’s project, the analytical efforts will be focused on anthropogenic soot particles (stemming from aircraft engines or vehicles due to incomplete combustion processes) and natural aerosols such as pollens. Because their effect on climate and their subsequent evolution in the atmosphere are closely related to their physicochemical properties, it is necessary to thoroughly study their structure and chemical surface composition so as to determine, ultimately, their influence on the formation of atmospheric clouds, particularly on the formation of condensation trails that can evolve into persistent cirrus clouds. The primary objective of this project is thus to study the structure and surface composition of anthropogenic and/or natural aerosols using micro-Raman Spectroscopy and Fourier transform infrared spectroscopy (FTIR). The project will then evolve in determining whether the characterized atmospheric aerosols are able to activate the growth of water droplets or ice crystals (nucleation) depending on the atmospheric conditions surrounding the particles (pressure, temperature, humidity).