title: Electrically induced microflows probed by fluorescence correlation spectroscopy.
abstract: 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.
authors.affiliation: Laboratoire de Physique de la Matière Condensée et Nanostructures, Universitd Claude Bernard Lyon 1 et CNRS, 69622 Villeurbanne Cedex, France. cybert@lpmcn.univ-lyon1.fr
authors.forename: C
authors.initials: C
authors.lastname: Ybert
authors.forename: F
authors.initials: F
authors.lastname: Nadal
authors.forename: R
authors.initials: R
authors.lastname: Salomé
authors.forename: F
authors.initials: F
authors.lastname: Argoul
authors.forename: L
authors.initials: L
authors.lastname: Bourdieu
mesh_terms: D004563:Electrochemistry / Q000379:methods*; D004574:Electromagnetic Fields; D044085:Microfluidics / Q000379:methods*; D015336:Molecular Probe Techniques; D012996:Solutions / Q000737:chemistry* / Q000528:radiation effects*; D013050:Spectrometry, Fluorescence / Q000379:methods*
chemical_list: D012996:Solutions