https://doi.org/10.1140/epje/i2004-10081-5
Electrically induced microflows probed by Fluorescence Correlation Spectroscopy
1
Laboratoire de Physique de la Matière Condensée et Nanostructures, Université Claude Bernard Lyon 1 et CNRS, 69622, Villeurbanne Cedex, France
2
Centre de Recherche Paul Pascal, CNRS, Avenue Albert Schweitzer, 33600, Pessac, France
3
Laboratoire de Dynamique des Fluides Complexes, UMR CNRS 7506, Institut de Physique, 3 rue de l’Université, 67084, Strasbourg, France
* e-mail: cybert@lpmcn.univ-lyon1.fr
Received:
30
June
2004
Accepted:
21
December
2004
Published online:
20
January
2005
We report on the experimental characterisation of electrically induced flows at the micrometer scale through Fluorescence Correlation Spectroscopy (FCS) measurements. We stress the potential of FCS as a useful characterisation technique in microfluidics devices for transport properties cartography. The experimental results obtained in a model situation are in agreement with previous calculations (F. Nadal, F. Argoul, P. Kestener, B. Pouligny, C. Ybert, A. Ajdari, Eur. Phys. J. E 9, 387 (2002)) predicting the structure and electric-field dependency of the induced flow. Additionally, the present study evidences a complex behaviour of the probe nanobeads under electric field whose precise understanding might prove relevant for situations where nano-objects interact with an external electric field.
PACS: 82.70.Dd Colloids – / 47.65.+a Magnetohydrodynamics and electrohydrodynamics – / 85.90.+h Other topics in electronic and magnetic devices and microelectronics (restricted to new topics in section 85) –
© EDP Sciences, Società Italiana di Fisica and Springer-Verlag, 2005
