Removal of background signals from fluorescence thermometry measurements in PDMS microchannels using fluorescence lifetime imaging.
basic_science · Level V
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- Record sourced from PubMed, PMID 19904413.
- Also identified by DOI 10.1039/b913293g.
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Abstract
We report a method for removing unwanted contributions to fluorescence signals from dyes absorbed in polydimethylsiloxane (PDMS) using fluorescence lifetime imaging microscopy (FLIM). By analysing experimental fluorescence decays using a bi-exponential decay model, we are able to discriminate between emission originating from dye molecules in free solution and those absorbed within the PDMS substrate. Simple image processing allows the unwanted background signal to be removed and thus enables a more accurate assessment of temperature. The efficacy of the approach is demonstrated by measuring temperature changes within a droplet-based PCR device.
Medical subject headings
- Dimethylpolysiloxanes
- Fluorescent Dyes
- Microfluidic Analytical Techniques
- Rhodamines