Optical characterization of the heating performance of microchannel fluid flow

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Day, Daniel | Gu, Min

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Optical characterization of the heating performance of microchannel fluid flow

Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/64397

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Title: Optical characterization of the heating performance of microchannel fluid flow
Author(s): Day, Daniel; Gu, Min
Abstract: The temperature dependent quantum efficiency of fluorescent dyes can be used to measure changes in temperature of the fluorescent dye molecules. This paper describes the use of Rhodamine dye as a temperature sensitive based fluorescence indicator for the characterization of heating in a pressure driven microfluidic device with high spatial resolution. A microheating element is used to control the temperature of the fluid in order to create localized heating in the microchannel. The temperature dependent fluorescence intensity of Rhodamine 6G for a concentration of 1 mmol / L is characterized with a 5th order polynomial then used to detect the temperature of the fluid in a microchannel. Fluid temperatures in the range of 20-85 ° C are measured with an uncertainty of < 2 ° C using a confocal fluorescence microscope. This method enables the characterization, imaging and mapping of three-dimensional temperature gradients within a microchannel.
Publication type: Journal article
Research centre: Swinburne University of Technology. Faculty of Engineering and Industrial Sciences. Centre for Micro-Photonics
Source: Optics and Lasers in Engineering, Vol. 48, no. 1 (Jan 2010), pp. 32-36
Publication year: 2010
FOR Code(s): 0205 Optical Physics
Keyword(s): Fluorescent dyes; Heating; Microfluidics; Rhodamine dye; Temperature
Publisher: Elsevier
ISSN: 0143-8166
Publisher URL: http://dx.doi.org/10.1016/j.optlaseng.2009.07.004
Peer reviewed