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Issue 1, 2003
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PDMS 2D optical lens integrated with microfluidic channels: principle and characterization

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Abstract

In this paper, the fabrication and characterization of PDMS 2D-optical lenses are reported. These lenses are designed in order to improve the performance of fluorescent spectroscopy detection performed on a portable chip using optical fibers. The fabrication process of the PDMS layer is first detailed, and the patterns are then checked with a SEM. By comparing various interfacial structures, it is shown that the beam properties of the light coming out from the fiber can be modified depending on the lens curvature radius. As a consequence, for a constant dye concentration, the use of such lenses can increase the intensity of fluorescent response close to the fiber or far from the fiber, compared to the same design with a flat interface. This excitation improvement corresponding to a stronger response from the dye then consequently leads to around three times higher sensitivity of the on-chip detection method for fluorescent spectroscopy.

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Publication details

The article was received on 18 Nov 2002, accepted on 27 Jan 2003 and first published on 05 Feb 2003


Article type: Paper
DOI: 10.1039/B211280A
Citation: Lab Chip, 2003,3, 40-45
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    PDMS 2D optical lens integrated with microfluidic channels: principle and characterization

    S. Camou, H. Fujita and T. Fujii, Lab Chip, 2003, 3, 40
    DOI: 10.1039/B211280A

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