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Issue 5, 2011
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Reduced UV light scattering in PDMS microfluidic devices

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Abstract

Microfluidic devices which consist of polydimethylsiloxane (PDMS) are used extensively for the production of polymer microparticles through the use of droplet templating and on-chip photopolymerization. However, in existing methods, spatial confinement of the photochemical droplet solidification is impaired by UV light scattering inside the PDMS elastomer. We present a technique to load PDMS microfluidic devices with a fluorescent dye that absorbs the scattered UV light and shifts it to longer wavelengths. By this means, the stray light is no longer harmful, and UV exposure can be limited to a desired region on the microfluidic chip.

Graphical abstract: Reduced UV light scattering in PDMS microfluidic devices

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Publication details

The article was received on 12 Nov 2010, accepted on 07 Dec 2010 and first published on 10 Jan 2011


Article type: Technical Note
DOI: 10.1039/C0LC00594K
Citation: Lab Chip, 2011,11, 966-968
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    Reduced UV light scattering in PDMS microfluidic devices

    S. Seiffert, J. Dubbert, W. Richtering and D. A. Weitz, Lab Chip, 2011, 11, 966
    DOI: 10.1039/C0LC00594K

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