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Proceedings Paper

A microfluidic sensor for dynamic surface tension measurement
Author(s): Nam-Trung Nguyen; Franck Alexis Chollet; Chun Yang
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Paper Abstract

This paper reports on a hybrid polymeric microfluidic device with optical detection for droplet-based systems. The optical part of the device is integrated by a hybrid concept. The microfluidic structures were fabricated using CO2 laser on PMMA (poly methylmethacrylate) substrate. The microfluidic network consists of two microchannels for forming droplets of an aqueous liquid in an immiscible carrier liquid. The optical component consists of two optical fibers for guiding laser light from the source, through the detection point, to a photo diode. The formed droplets pass the detection point and diffract the incoming laser light. The detected signal at the photo diode can be used for evaluating droplet size, droplet shape, and droplet formation frequency. The device can detect very high formation frequencies, which are not detectable using a conventional CCD camera/microscope setup.

Paper Details

Date Published: 19 January 2006
PDF: 10 pages
Proc. SPIE 6036, BioMEMS and Nanotechnology II, 60360M (19 January 2006); doi: 10.1117/12.639035
Show Author Affiliations
Nam-Trung Nguyen, Nanyang Technological Univ. (Singapore)
Franck Alexis Chollet, Nanyang Technological Univ. (Singapore)
Chun Yang, Nanyang Technological Univ. (Singapore)

Published in SPIE Proceedings Vol. 6036:
BioMEMS and Nanotechnology II
Dan V. Nicolau, Editor(s)

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