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We present a unique rheometer allowing the study of fluid systems from the macroscopic scale to the microscopic scale. This rheometer developed from a surface forces apparatus geometry allows the equilibrium measurement of the mechanical response of the studied system. From this state of equilibrium, we impose a small harmonic perturbation of the gap between surfaces to measure the rheological response in linear regime. It is possible for continuous confinement from 10 micrometers to nanometer in a single experiment, the study of the transition from macrocopic to the microscopic.
rheometer, confinement, nanofluidics, SFA.
Nous souhaitons remercier Jean-Luc Mocellin de l’Institut Néel pour la conception et la réalisation des amplificateurs des photodiodes et Bruno Travers pour la réalisation du pilotage électronique en vitesse de la platine piezo-électrique.
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