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Excitation-Scanning Hyperspectral Imaging Microscopy to Efficiently Discriminate Fluorescence Signals
Published on: August 22, 2019
Non-emissive plastic colour filters for fluorescence detection.
M Yamazaki1, S Krishnadasan, A J deMello
1Dept. Chemistry and Centre for Plastic Electronics, Imperial College London, Exhibition Road South Kensington, London SW7 2AY, UK.
Lab on a Chip
|September 14, 2012
Summary
Researchers developed novel non-emissive plastic filters for highly sensitive fluorescence detection. These filters significantly reduce auto-fluorescence, enabling cost-effective and sensitive diagnostic assays.
Area of Science:
- Materials Science
- Analytical Chemistry
- Biotechnology
Background:
- Conventional color filters in fluorescence detection suffer from auto-fluorescence, limiting sensitivity.
- Plastic-based optical filters offer potential for low-cost, flexible diagnostic devices.
Purpose of the Study:
- To fabricate non-emissive short- and long-pass filters on plastic substrates.
- To evaluate the performance of these filters for high-sensitivity fluorescence detection.
Main Methods:
- Titania-coated polyethylene terephthalate (PET) films were immersed in dye solutions (xylene cyanol for short-pass, fluorescein for long-pass).
- Dye molecules were adsorbed onto the titania surface, with photo-generated excitons quenched at the interface.
- Filters were tested in a system with a 505 nm LED, Si photodiode, and T8661 Transfluosphere beads.
Main Results:
- Non-emissive short- and long-pass filters were successfully fabricated on PET.
- The filters demonstrated negligible auto-fluorescence due to efficient exciton quenching.
- A detection limit of 3 × 10(4) beads μL(-1) was achieved for T8661 Transfluosphere beads.
Conclusions:
- The developed plastic filters provide a low-cost, high-sensitivity solution for fluorescence detection.
- This technology is suitable for various bead-based immunodiagnostic assays.
- The non-emissive nature overcomes limitations of conventional color filters.
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