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Fluorescence images (10 μm × 10 μm) of (a) single Cy5 labeled DNA oligo molecules spin-coated on a glass coverslip (white circles indicate some blinking effect), (b) single Cy5 labeled DNA oligo molecules tethered to SIFs, and (c) single Cy5 labeled DNA oligo molecules coupled to single silver nanoparticles. Illumination intensity at 633 nm, 1.4 kW/cm2.
