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Reference : UMR8502-MARIMP-002
Workplace : ORSAY
Date of publication : Monday, September 07, 2020
Type of Contract : FTC Scientist
Contract Period : 18 months
Expected date of employment : 1 January 2021
Proportion of work : Full time
Remuneration : 2700 € - 3200 € (less than 2 years experience, 18 months contract)
Desired level of education : PhD
Experience required : 1 to 4 years
An experimental postdoctoral position in soft matter physics is open at LPS in the framework of the ANR research project SoftQC (https://softqc.wordpress.com/). The ANR project offers a stimulating scientific environment including nanochemistry (Laboratoire de Chimie at ENS Lyon), structural studies using X-ray scattering, numerical simulations and theoretical approaches (LPS, Orsay). The project is devoted to complex superlattices formed by nanoparticles (NPs) which are promising candidates to produce smart materials with new plasmonic properties.
Controlling the formation of NPs superlattices in a reproducible manner is an important objective. The NPs will consist in metallic nanocrystals stabilized by organic ligands and will be dispersed in various hydrophobic solvents.
- The postdoctoral researcher will develop a new experimental approach based on solvent crystallization inside NPs suspensions, an alternative to solvent evaporation. Crystallization of the solvent can be triggered either by lowering temperature or applying
pressure. It induces a phase separation between the crystallized solvent on one hand, and a concentrated suspension of NPs on the other hand where superlattices can form spontaneously.
- X-ray scattering will allow continuous monitoring of superlattices growth and stability when changing temperature or pressure.
Moreover, well-chosen binary mixtures of such NPs are expected to lead to complex superlattices with quasicrystalline long range order.
Candidate must have completed a PhD in the field of Soft Matter Physics. Previous experience in scattering and SAXS/SANS data analysis will be an advantage.
Keywords: self-assembly, nanoparticle, superlattice, crystallization, X-ray scattering and diffraction
Research activity will take place at the LPS. The postdoctoral researcher will join the MATRIX team of the LPS laboratory.
Constraints and risks
Research activity will need using X-ray experiments, involving safety regulations of radioprotection.
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