Fluorescence resonance energy transfer detected by scanning near-field optical microscopy

A.K. Kirsch, V. Subramaniam, A. Jenei, T.M. Jovin

    Research output: Contribution to JournalArticleAcademicpeer-review

    Abstract

    Fluorescence resonance energy transfer (FRET) between excited fluorescent donor and acceptor molecules occurs via the Forster mechanism over a range of 1-10 nm. Because of the strong (sixth power) distance dependence of the signal, FRET has been used to assess the proximity of molecules in biological systems. We used a scanning near-field optical microscope (SNOM) operated in the shared-aperture mode using uncoated glass fibre tips to detect FRET between dye molecules embedded in polyvinyl alcohol films and bound to cell surfaces. FRET was detected by selective photobleaching of donor and acceptor fluorophores. We also present preliminary results on pixel-by-pixel energy transfer efficiency measurements using SNOM.
    Original languageEnglish
    JournalJournal of Microscopy
    Volume194
    Issue number2-3
    DOIs
    Publication statusPublished - 1999

    Keywords

    • [Cell-surface proteins, Fluorescence resonance ene

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