Organisation/Company CNRS Department Physique et mécanique des milieux hétérogenes Research Field Mathematics History » History of science Researcher Profile First Stage Researcher (R1) Application Deadline 13 Nov 2026 - 23:59 (UTC) Country France Type of Contract Temporary Job Status Full-time Hours Per Week 35 Offer Starting Date 1 Apr 2027 Is the job funded through the EU Research Framework Programme? Not funded by a EU programme Is the Job related to staff position within a Research Infrastructure? No
Offer Description
The postdoctoral researcher will study in detail the heteroaggregation of microplastics with microorganisms in flows, quantifying the effect of microorganisms and hydrodynamic conditions on biofilm development and on the structure of the resulting aggregates. This work will rely on a microfluidic and acoustofluidic platform under development in the laboratory, enabling the culture, observation, and contactless manipulation of these objects. Particular attention will be paid to the biological composition and properties of the biofilms.
- Setting up and optimizing experimental protocols: culture of microorganisms (bacteria, micro-algae) under microfluidic flow, preparation and characterization of model microplastic suspensions
- Performing heteroaggregation experiments and monitoring biofilm formation by optical and fluorescence microscopy
- Analyzing and quantifying biofilm structure and growth (imaging, image analysis)
- Analyzing the expression of target genes (RT-qPCR) as a function of culture conditions (flow, presence of microplastics)
- Data analysis, writing scientific publications, and presenting results at conferences
- Contributing to supervision and to the scientific life of the laboratory
The postdoctoral researcher will be hosted at the PMMH laboratory (Physique et Mécanique des Milieux Hétérogènes, UMR 7636 CNRS–ESPCI–PSL–Sorbonne Université–Université Paris Cité) in Paris (5th arrondissement), in Alice Pelosse's team. The project lies at the interface between fluid mechanics, soft matter physics, and environmental microbiology. It will be conducted in close collaboration with Olivier Espeli's team at the Centre interdisciplinaire de recherche en biologie, Collège de France, for all the aspects on microbiology (biofilms, bacterial genetics).
- Strong background in microbiology, microbial ecology and biofilm studies: culture of bacteria and/or micro-algae, classical characterization techniques (growth monitoring, optical and confocal microscopy, fluorescence staining) and biomolecular analysis (DNA extraction, PCR, qPCR, sequencing analysis)
- Knowledge of microplastics and their interaction with microorganisms, advanced polymer characterization techniques
- Proficiency in image analysis and data processing tools (Python)
- Experimental rigor, autonomy, and ability to work in an interdisciplinary environment at the physics–biology interface
- Good scientific communication skills (fluent English, scientific writing)
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post doctorat at PMMH (M/F) employeur : CNRS
Rejoindre la Délégation régionale Bretagne et Pays de la Loire du CNRS, c'est intégrer une équipe RH dynamique et engagée, dédiée à l'accompagnement des laboratoires de recherche. Vous bénéficierez d'un environnement de travail collaboratif, riche en opportunités de développement professionnel, tout en profitant d'avantages tels que 44 jours de congés annuels et une prise en charge significative des frais de transport. Ici, l'autonomie et la proximité avec le terrain sont valorisées, vous permettant de contribuer activement à des projets RH structurants au service de la recherche publique.
