Optical detection for droplet size control in microfluidic droplet-based analysis systems

Author

Nguyen, Nam-Trung ; Lassemono, Sumantri ; Chollet, Franck Alexis

Author_Institution

Sch. of Mech. & Aerosp. Eng., Nanyang Technol. Univ., Singapore

Volume

2

fYear

2005

fDate

5-9 June 2005

Firstpage

1557

Abstract

We report for the first time a hybrid polymeric microfluidic device with optical detection for microfluidic droplet-based systems. The device consists of a fluidic part and an optical part. Microchannels were fabricated using CO₂ laser. The microfluidic part consists of two microchannels for forming droplets of an aqueous liquid in an immiscible carrier liquid. The optical part consists of two optical fiber for light emission and light detection. Microdroplets are formed, when the aqueous liquid is injected into the carrier flow. The formed bubbles pass the optical detection and diffract some of the incoming light. The detected signal from the other optical fiber can be evaluated for droplet size, droplet shape, and droplet formation frequency.

Keywords

bubbles; drops; light diffraction; microfluidics; optical fibres; polymers; CO₂ laser; aqueous liquid; bubble formation; carrier flow; droplet formation frequency; droplet microfluidics; droplet shape; droplet size control; fluidic part; hybrid polymeric microfluidic device; immiscible carrier liquid; light detection; light emission; microchannels; microdroplet formation; microfluidic droplet-based analysis system; optical detection; optical fiber; optical part; Fiber lasers; Microchannel; Microfluidics; Optical detectors; Optical devices; Optical diffraction; Optical fibers; Optical polymers; Size control; Stimulated emission;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid-State Sensors, Actuators and Microsystems, 2005. Digest of Technical Papers. TRANSDUCERS '05. The 13th International Conference on

Print_ISBN

0-7803-8994-8

Type

conf

DOI

10.1109/SENSOR.2005.1497382

Filename

1497382