Job title:
postdoctoral researcher (M/F)
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Job description
Offer DescriptionThe postdoc will lead investigations into non-Brownian fluctuations in chemically reactive systems. A bibliographic study will be first carried out, then a model chemically reactive system will be conceived that respects the temporal- and force-resolution constraints of the instruments to be used. Once experiments on a wide range of chemical compositions have been accomplished, data analysis will be carried out to build a conceptual picture of non-Brownian fluctuations and confronted with model predictions that will be made by the PI’s collaborator. The postdoc will also lead the writing of scientific articles and present at international conferences.During this post-doc, we will focus on simplified model physical systems to experimentally investigate how a reactive environment can influence Brownian motion in two different ways. First, we use the cantilever of an atomic force microscope (AFM) as a model Brownian object in diverse chemically reactive environments, with or without a catalyst. Then, advection-diffusion coupling [1,2] observed in near-surface flows controlled with microfluidics -using total internal reflection fluorescence- will be leveraged as a means to amplify the modifications of diffusivity induced by identical reactive environments.[1] A. Vilquin et al., Physical Review Fluids, 6, 064201 (2021).
[2] A. Vilquin et al., Physical Review Letters, 130, 038201(2023).Microscopic living systems are strongly non-equilibrium, chemically reactive systems, whose dominant transport mode is Brownian. The production or degradation of chemical compounds is generally accompanied by an energy input and an energy output. The input is associated with energy barriers which once overcome -typically by thermal activation and often with the aid of a catalyst- give the output emission of heat for exothermic processes.At colloidal scales, these outputs are on the order of several tens of kT, i.e., an order of magnitude larger than the typical thermal energy fluctuations responsible for Brownian motion. Significant recent activity was thus devoted to addressing how such reactivity could modify this latter fundamental transport mechanism, usually through a measurement of a diffusion coefficient.Where to apply WebsiteRequirementsResearch Field Chemistry Education Level PhD or equivalentResearch Field Physics Education Level PhD or equivalentResearch Field Physics Education Level PhD or equivalentLanguages FRENCH Level BasicResearch Field Chemistry » Physical chemistry Years of Research Experience 1 – 4Research Field Physics » Chemical physics Years of Research Experience 1 – 4Research Field Physics » Biophysics Years of Research Experience 1 – 4Additional InformationEligibility criteriaWe are searching for a dynamic, curious and highly motivated person for this 18-month post-doctoral position. The successful candidate should have expertise in a cross section of AFM, soft matter, statistical physics, physical chemistry and/or hydrodynamics.Website for additional job detailsWork Location(s)Number of offers available 1 Company/Institute GULLIVER Country France City PARIS 05 GeofieldContact CityPARIS 05 WebsiteSTATUS: EXPIREDShare this page
Expected salary
Location
Paris
Job date
Fri, 07 Jun 2024 00:25:53 GMT
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