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Issue 7, 2011
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Non-emissive colour filters for fluorescence detection

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We describe a simple technique for fabricating non-emissive colour filters based on the sensitisation of a highly porous nanostructured metal-oxide film with a monolayer of dye molecules. Ultrafast electron transfer at the oxide/dye interface induces efficient quenching of photogenerated excitons in the dye, reducing the photoluminescence quantum yield by many orders of magnitude. The resultant filters exhibit much less autofluorescence than conventional colour filters (where the chromophore is dispersed in a glass or polymer host), and are a viable low cost alternative to interference filters for microfluidic devices and other applications requiring non-emissive filtering.

Graphical abstract: Non-emissive colour filters for fluorescence detection

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Publication details

The article was received on 29 Nov 2010, accepted on 21 Feb 2011 and first published on 24 Feb 2011

Article type: Paper
DOI: 10.1039/C0LC00642D
Lab Chip, 2011,11, 1228-1233

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    Non-emissive colour filters for fluorescence detection

    M. Yamazaki, O. Hofmann, G. Ryu, L. Xiaoe, T. K. Lee, A. J. deMello and J. C. deMello, Lab Chip, 2011, 11, 1228
    DOI: 10.1039/C0LC00642D

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