On the role of electromagnetic boundary conditions in single molecule fluorescence lifetime studies of dyes embedded in thin films

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Vallée, R. and Tomczak, N. and Gersen, H. and Dijk, E.M.H.P. van and Garcia-Parajo, M.F. and Vancso, G.J. and Hulst, N.F. van (2001) On the role of electromagnetic boundary conditions in single molecule fluorescence lifetime studies of dyes embedded in thin films. Chemical Physics Letters, 348 . pp. 161-167. ISSN 0009-2614

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Abstract:Single molecule fluorescence lifetime studies are generally performed in thin polymer films, where the influence of the interface on the behaviour of fluorescing molecules is not negligible. In order to describe this influence, we investigate annealed films of different thickness. We show that the distribution of fluorescence lifetimes of the embedded dyes is shifted to lower values as the thickness of the film increases. We explain this shift by simple electromagnetic arguments related to the boundary conditions at the interfaces of the polymer film with air and glass, respectively. The conclusion is that extreme care must be taken in order to interpret single molecule data with respect to the true chemical nature of the phenomena.
Item Type:Article
Copyright:© 2001 Elsevier Science B.V.
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Science and Technology (TNW)
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Link to this item:http://purl.utwente.nl/publications/37339
Official URL:http://dx.doi.org/10.1016/S0009-2614(01)01119-8
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