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Reference : UMR5306-ANNBIA-004
Workplace : VILLEURBANNE
Date of publication : Monday, February 22, 2021
Scientific Responsible name : Anne-Laure Biance
Type of Contract : PhD Student contract / Thesis offer
Contract Period : 36 months
Start date of the thesis : 1 September 2021
Proportion of work : Full time
Remuneration : 2 135,00 € gross monthly
Description of the thesis topic
The transport properties (ionic / chemical / mass / thermal) in a liquid at the nanoscale (nanofluidic) are mainly affected by interactions with surfaces. Such transport phenomena are coupled and have many applications, to drive liquid flows at the nanometric scale, but also to harvest energy (transfer of thermal or chemical energy into electricity for example), or finally to decontaminate or desalt contaminated water. Regarding ion transport, it is classically established that it is governed by the electrostatic interactions at the interfaces (i.e. the surface potential) and the hydrodynamic condition at the wall.
Very recently, this description has been challenged, and various experiments have demonstrated coupled transport properties which greatly exceed expectations, which is very favorable for the applications. This is particularly the case for transport close to electrically conductive interfaces or in ultraconfined systems (the thickness of a few water molecules).
We propose in this thesis to fundamentally study these effects and to understand them. For this, we will use a simple system, which is inherently nanometric, a soap film. By changing the pressure in the liquid around the soap film, we will be able to vary its thickness, from nanometers to micrometers. In addition, as part of a collaboration with chemists and thanks to the molecules they will have synthesized, we will cover the interfaces of the soap film with an electron-conducting molecular single layer.
The object of the thesis will be to design experiments allowing to test and understand the properties of coupled transport in ultra-confinement, close to "electronic" walls and possibly switchable.
The PhD candidate will be part of the Liquids and Interfaces team at iLM. On this nanofluidic theme, the PhD student will interact with other researchers in the team, and more particularly with another PhD student and a post-doct, working on related subjects.
The project is funded by ANR SoftNanoflu, bringing together three partners. In addition to the Liquids and Interface team, a team of organic chemists from the Charles Gerard Institute in Montpellier and a team of spectroscopists from the iLM are participating in the project. The doctoral student will therefore also have to interact with them during regular meetings.
We are looking for a candidate who has already completed an experimental internship in a research laboratory and who has a master's degree in one of the following specialties; condensed matter physics, soft matter, physico-chemistry, chemical engineering or fluid mechanics.
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