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- Fulwyler, CH, et al.
(författare)
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Personal remembrances
- 2005
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Ingår i: CYTOMETRY PART A. - 1552-4922. ; 67A:2, s. 54-60
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
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- Gosch, M., et al.
(författare)
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Parallel single molecule detection with a fully integrated single-photon 2X2 CMOS detector array
- 2004
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Ingår i: Journal of Biomedical Optics. - : SPIE-Intl Soc Optical Eng. - 1083-3668 .- 1560-2281. ; 9:5, s. 913-921
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Tidskriftsartikel (refereegranskat)abstract
- We present parallel single molecule detection (SMD) and fluorescence correlation spectroscopy (FCS) experiments with a fully integrated complementary metal oxide semiconductor (CMOS) single-photon 2 X 2 detector array. Multifocal excitation is achieved with a diffractive optical element (DOE). Special emphasis is placed on parallelization of the total system. The performance of the novel single-photon CMOS detector is investigated and compared to a state-of-the-art single-photon detecting module [having an actively quenched avalanche photodiode (APD)] by measurements on free diffusing molecules at different concentrations. Despite the order of magnitude lower detection efficiency of the CMOS detector compared to the state-of-the-art single-photon detecting module, we achieve single molecule sensitivity and reliably determine molecule concentrations. In addition, the CMOS detector performance for the determination of the fraction of slowly diffusing molecules in a primer solution (two-component analysis) is demonstrated. The potential of this new technique for high-throughput confocal-detection-based systems is discussed.
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