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Biomedical Optics Express

Biomedical Optics Express

  • Editor: Joseph A. Izatt
  • Vol. 1, Iss. 5 — Dec. 1, 2010
  • pp: 1302–1308

Fluorescence lifetime biosensing with DNA microarrays and a CMOS-SPAD imager

Gerard Giraud, Holger Schulze, Day-Uei Li, Till T. Bachmann, Jason Crain, David Tyndall, Justin Richardson, Richard Walker, David Stoppa, Edoardo Charbon, Robert Henderson, and Jochen Arlt  »View Author Affiliations

Biomedical Optics Express, Vol. 1, Issue 5, pp. 1302-1308 (2010)

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Fluorescence lifetime of dye molecules is a sensitive reporter on local microenvironment which is generally independent of fluorophores concentration and can be used as a means of discrimination between molecules with spectrally overlapping emission. It is therefore a potentially powerful multiplexed detection modality in biosensing but requires extremely low light level operation typical of biological analyte concentrations, long data acquisition periods and on-chip processing capability to realize these advantages. We report here fluorescence lifetime data obtained using a CMOS-SPAD imager in conjunction with DNA microarrays and TIRF excitation geometry. This enables acquisition of single photon arrival time histograms for a 320 pixel FLIM map within less than 26 seconds exposure time. From this, we resolve distinct lifetime signatures corresponding to dye-labelled HCV and quantum-dot-labelled HCMV nucleic acid targets at concentrations as low as 10 nM.

© 2010 OSA

OCIS Codes
(120.3890) Instrumentation, measurement, and metrology : Medical optics instrumentation
(170.2520) Medical optics and biotechnology : Fluorescence microscopy
(170.3650) Medical optics and biotechnology : Lifetime-based sensing
(280.1415) Remote sensing and sensors : Biological sensing and sensors

ToC Category:
Biosensors and Molecular Diagnostics

Original Manuscript: August 10, 2010
Revised Manuscript: September 12, 2010
Manuscript Accepted: October 30, 2010
Published: November 4, 2010

Gerard Giraud, Holger Schulze, Day-Uei Li, Till T. Bachmann, Jason Crain, David Tyndall, Justin Richardson, Richard Walker, David Stoppa, Edoardo Charbon, Robert Henderson, and Jochen Arlt, "Fluorescence lifetime biosensing with DNA microarrays and a CMOS-SPAD imager," Biomed. Opt. Express 1, 1302-1308 (2010)

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