A stress-controlled shear cell for small-angle light scattering and microscopy Auteur(s): Aime S., Ramos L., Fromental J.-M., Prevot G., Jelinek R., Cipelletti L. (Article) Publié: Review Of Scientific Instruments, vol. 87 p.123907 (2016) Texte intégral en Openaccess : Ref HAL: hal-01292652_v1 Ref Arxiv: 1603.06703 DOI: 10.1063/1.4972253 WoS: 000392096800036 Ref. & Cit.: NASA ADS Exporter : BibTex | endNote 10 Citations Résumé: We develop and thoroughly test a stress-controlled, parallel plates shear cell that can be coupled to an optical microscope or a small angle light scattering setup, for simultaneous investigation of the rheological properties and the microscopic structure of soft materials under an imposed shear stress. In order to minimize friction, the cell is based on an air bearing linear stage, the stress is applied through a contactless magnetic actuator, and the strain is measured through optical sensors. We discuss the contributions of inertia and of the small residual friction to the measured signal and demonstrate the performance of our device in both oscillating and step stress experiments on a variety of viscoelastic materials. |