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Sensors (Basel). 2011;11(3):2961-71. doi: 10.3390/s110302961. Epub 2011 Mar 4.

Driving down the detection limit in microstructured fiber-based chemical dip sensors.

Author information

1
Institute for Photonics & Advanced Sensing, School of Chemistry & Physics, University of Adelaide, Adelaide, SA 5005, Australia. erik.schartner@adelaide.edu.au

Abstract

We present improvements to fluorescence sensing in soft-glass microstructured optical fibers that result in significantly improved sensitivity relative to previously published results. Concentrations of CdSe quantum dots down to 10 pM levels have been demonstrated. We show that the primary limitation to the sensitivity of these systems is the intrinsic fluorescence of the glass itself.

KEYWORDS:

dip sensing; microstructured optical fiber; quantum dots; soft glass

PMID:
22163778
PMCID:
PMC3231611
DOI:
10.3390/s110302961
[Indexed for MEDLINE]
Free PMC Article

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