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Reference : UMR5258-JEAGIM-017
Workplace : PESSAC
Date of publication : Wednesday, September 8, 2021
Type of Contract : FTC Scientist
Contract Period : 12 months
Expected date of employment : 1 November 2021
Proportion of work : Full time
Remuneration : between 2648 et 3768 € gross monthly (based on experience)
Desired level of education : PhD
Experience required : Indifferent
Within the framework of an ANR project in collaboration with Solvay and the LGC, we have developed microfabrication protocols to integrate nanoporous membranes into microfluidic chips.
These methods are based on 2 different techniques: spatially-resolved photopolymerization of nanoporous hydrogels, and spatially localized self-assembly of nanoparticles in a microfluidic channel. The goal of this post-doctoral project is to exploit these nanoporous membranes to address mass transport issues in colloidal systems.
In a first part, we want to perform measurements of water permeation through these membranes when an air flow of imposed humidity downstream induces evaporation and drives a flow. We expect non-trivial effects, especially for the case of membranes made of nanoparticles, related to the confinement of water in the nanoporosity.
In a second part, we intend to use these same devices to trap upstream of the membrane a stationary gradient of colloids in a configuration close to ultra-filtration. Concentration profile measurements should then allow novel measurements of
the collective diffusion coefficient of the colloidal dispersion, in a configuration close to the Donnan equilibrium. Such measurements will be compared to theoretical predictions in the case of charged dispersions, in close collaboration with LGC.
The candidate must hold a Ph.D in physical chemistry of Soft Matter, with strong experience in the development of microfluidics.
Research will be conducted in the Laboratoire du futur (LOF - UMR 5258) in the framework of an ANR project (ANR Osmochip).
The UMR LOF is a joint reserach unit (UMR5258) under the supervision of CNRS, th industrial group Solvay and University of Bordeaux.
The laboratory's research focuses on the physical-chemistry of soft matter and has expertise in the field of microfluidic instrumentation.
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