Accueil >
Production scientifique
Electronique & électrotechnique
(2) Production(s) de l'année 2016
|
|
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.
|
|
|
|
An efficient scheme for sampling fast dynamics at a low average data acquisition rate
Auteur(s): Philippe A. M., Aime S., Roger V., Jelinek R., Prevot G., Berthier L., Cipelletti L.
(Article) Publié:
Journal Of Physics: Condensed Matter, vol. 28 p.075201 (2016)
Texte intégral en Openaccess :
Ref HAL: hal-01281406_v1
Ref Arxiv: 1511.07756
DOI: 10.1088/0953-8984/28/7/075201
WoS: 000368793200012
Ref. & Cit.: NASA ADS
Exporter : BibTex | endNote
10 Citations
Résumé: We introduce a temporal scheme for data sampling, based on a variable delay between two successive data acquisitions. The scheme is designed so as to reduce the average data flow rate, while still retaining the information on the data evolution on fast time scales. The practical implementation of the scheme is discussed and demonstrated in light scattering and microscopy experiments that probe the dynamics of colloidal suspensions using CMOS or CCD cameras as detectors.
Commentaires: Published in J. Phys.: Cond. Matter. 11 pages, 5 figures + Supporting Data (Python software to implement the method described in the manuscript)
|
