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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editor: Gregory W. Faris
  • Vol. 2, Iss. 6 — Jun. 13, 2007

Spatially extended FCS for visualizing and quantifying high-speed multiphase flows in microchannels

Sara M. Hashmi, Michael Loewenberg, and Eric R. Dufresne  »View Author Affiliations


Optics Express, Vol. 15, Issue 10, pp. 6528-6533 (2007)
http://dx.doi.org/10.1364/OE.15.006528


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Abstract

We report the development of spatially extended fluorescence correlation spectroscopy for visualizing and quantifying multiphase flows in microchannels. We employ simultaneous detection with a high-speed camera across the width of the channel, enabling investigation of the dynamics of the flow at short time scales. We take advantage of the flow to scan the sample past the fixed illumination, capturing frames up to 100 KHz. At these rates, we can resolve the motion of sub-micron particles at velocities up to the order of 1 cm/s. We visualize flows with kymographs and quantify velocity profiles by cross-correlations within the focal volume. We demonstrate the efficacy of our approach by measuring the depth-resolved velocity profile of suspensions of sub-micron diameter silica particles flowing up to 1.5 mm/s.

© 2007 Optical Society of America

OCIS Codes
(120.7250) Instrumentation, measurement, and metrology : Velocimetry
(280.2490) Remote sensing and sensors : Flow diagnostics
(300.2530) Spectroscopy : Fluorescence, laser-induced

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: March 30, 2007
Revised Manuscript: May 9, 2007
Manuscript Accepted: May 10, 2007
Published: May 11, 2007

Virtual Issues
Vol. 2, Iss. 6 Virtual Journal for Biomedical Optics

Citation
Sara M. Hashmi, Michael Loewenberg, and Eric R. Dufresne, "Spatially extended FCS for visualizing and quantifying high-speed multiphase flows in microchannels," Opt. Express 15, 6528-6533 (2007)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=oe-15-10-6528


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