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Reference : UMR5306-JERMAR-001
Workplace : VILLEURBANNE
Date of publication : Wednesday, April 07, 2021
Type of Contract : FTC Scientist
Contract Period : 12 months
Expected date of employment : 5 July 2021
Proportion of work : Full time
Remuneration : Between € 2,675 and € 3,084 gross monthly
Desired level of education : PhD
Experience required : 1 to 4 years
In the framework of a project EMERGENCE founded by the CNRS, the candidate will be involved in a project aimed to control the elastic properties of semiconductor nanoplatelets (NPLs). Modifications of the local environment of these objects can be monitored by measuring their vibrational properties using low frequency Raman spectroscopy. In a first approximation, the mass-load effect dominates the vibrational changes,1,2 but when the thickness of the nanoplatelets is reduced down to a few monolayers, the elastic properties of the nano-object itself are also strongly modified.
We recently demonstrated that such NPLs can act as nanobalances, being sensitive at the composition and weight of the surface ligands attached to it. We will explore and control this effect to develop a new type of nanoprobes able to detect single nano-objects.
The person recruited will be in charge of the colloidal synthesis of 2D nano-objects while controlling their surface state (ligands). She/he will then characterize these materials by optical spectroscopy (photoluminescence, Raman and low frequency Raman), transmission electron microscopy and XRD, to understand the impact of surface ligands on the structural properties of 2D nano-objects.
-Synthesis of 2D nano-objects by colloidal route
-XRD and TEM structural characterization
-Measurement of the vibrational properties of synthesized objects as a function of surface ligands
Doctorate in chemistry, colloidal synthesis, physico-chemistry.
-Electronic transmission microscopy
The recruit will join the luminescence team of the Lumière Matière institute (http://ilm.univ-lyon1.fr/luminescence). The Luminescence team is interested in the mechanisms of light-matter interaction in luminescent materials. In particular, the recruit will work on the Nanostructures / Nano-Optics sub-theme, and his work will focus on the link between the optical and vibrational properties of nanoparticles with their physico-chemical properties.
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