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Doctorant (H/F) - Schiltigheim, France - Icam, Site de Strasbourg-Europe

Icam, Site de Strasbourg-Europe

Entreprise vérifiée

Schiltigheim, France

il y a 1 mois

Posté par:

Sophie Dupont

beBee Recruiter

Description

Context:
Ammonia can be considered as a vehicle for storing and transporting hydrogen. However, it is extremely toxic.

Detecting infinitesimal ammonia leaks in different environments is therefore an important objective if hydrogen is to be part of our clean and safe energy future.

Conventional ammonia sensors are of porous metal oxides but have low sensitivity and too high detection limit.

We propose to use two types of sensor technology, organic field-effect transistors (gas detection) and organic electrochemical transistors (liquid detection) based on organic semiconductors, which have the ability to lower the detection limit threshold for certain gases (LOD <10 ppm).

1 The sensitivity of the sensors can also be improved thanks to the porosity of the active layer, which allows better diffusion of the ammonia and greater polymer-ammonia interaction.

2 The aim of the thesis will be to develop conductive layers with controlled porosity (variable pore size and specific surface area and preferential in-plane and out-of-plane orientation) based on innovative n-type semiconducting polymers,

3 that can undergo spontaneous selective reduction in the presence of ammonia.

PhD project:
The conditions for self-assembly of polymers in solution and in the solid state will be evaluated.

Several physico-chemical techniques can be used to introduce porosity into the layers (polymer gelation followed by the ice-templating technique,4 aerogel, polymer deposition using the layer-by-layer assembly method, etc.).

Multi-technique and multi-scale structural studies (BET, spectroscopy, surfacean alysis, electron microscopy, X-ray scattering) will be performed on the layers in order to correlate the structure-property relationships.

The electrochemical and transport properties of these layers will be studied to demonstrate the potential of these new materials as ultrasensitive ammonia sensors.

This work will be carried out in collaboration with the PECMAT team at ICS and the STELORG consortium (N.Leclerc, O. Bardagot, ICPEES; P. Lévêque, ICube).

Possible starting date:
October 2024
Doctoral contract from the Doctoral School of Physics and Chemistry-Physics

(ED182) of University of Strasbourg.

Type d'emploi :

CDD

Statut :
Cadre

Durée du contrat : 36 mois

Salaire :
à partir de 28 000,00€ par an

Avantages: