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Portail > Offres > Offre UMR7600-HELBER-001 - Electrolytes in confinement: a field theory approach (H/F)

Electrolytes in confinement: a field theory approach (M/W)

This offer is available in the following languages:
Français - Anglais

Date Limite Candidature : mardi 14 février 2023

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General information

Reference : UMR7600-HELBER-001
Nombre de Postes : 1
Workplace : PARIS 05
Date of publication : Tuesday, January 24, 2023
Type of Contract : FTC Scientist
Contract Period : 18 months
Expected date of employment : 1 April 2023
Proportion of work : Full time
Remuneration : between 2700 and 3900 euros monthly depending experience
Desired level of education : PhD
Experience required : Indifferent

Missions

The study of nanoconfined electrolytes is exciting both for their ubiquity and for the theoretical challenge they bring. The nanometer scale represents typical confinement size of technological and biological devices, screening length of low concentrated ionic solutions, and range at which water starts to behave as an inhomogeneous medium(1). The structure of interfacial solutions is thus a subtle interplay between short-range charge overscreening generated by the solvent, ion-ion correlations, water- and ion-surface interactions. These effects cannot be captured by macroscopic models such as Poisson-Boltzmann equation.

Activities

Can we develop a field theory describing nanoconfined electrolytes? To answer this question, the postdoctorate will extend the Landau-Ginzburg model developed for confined water(2) to electrolytes under confinement. Particular attention will be paid to the description of the surface-ion3 and water-ion interaction at this scale. Both classical and quantum simulations will be used as inputs to extract essential ingredients of the theory and to parametrize them.

Candidate interested, please send a CV and a short email motivating your interest in the position.

Hélène Berthoumieux: helene.berthoumieux@espci.fr

References: (1) L. Fumagalli et al., Anomalous low dielectric constant of confined water, Science, 360, 1339 (2018), (2) G. Monet, et. al, Nonlocal dielectric response of water in nanoconfinement, Phys. Rev. Led. 126 21600 (2021). (3) A.Robert et al., Coupled interactions at the ionic graphene/water interface, ArXiv,arXiv:2204.08779, (2022).

Skills

The candidate should have a PhD (or have it completed before the start of the position) in theory in physics or chemical physics. Interest for molecular dynamics/ ab initio simulations is appreciated.

Work Context

The postdoc will be based in ESPCI, in the center of Paris, under the supervision of Hélène Berthoumieux. The postdoc will be integrated in the lab « Gulliver ». The work will be in collaboration with Alexeï Kornyshev, (Imperial College, London) and Marie-Laure Bocquet (ENS, Paris). The postdoc duration is 18 months, start date at latest 1st April 2023, with salary according to experience.

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