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Entrapment in phospholipid vesicles quenches photoactivity of quantum dots

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Figure 1 (A) Microscopy photographs of Du145 cells showing development of red fluorescent spots originating from QD655 with simultaneous photobleaching of actin-GFP during illumination with the microscope excitation light (450–480 nm)
Figure 3 TeM images of the nanoparticles: (from 6 to 12 nm in size; (A) empty liposomes as unilamellar and multilamellar vesicles of variable sizes (100–400 nm); (B) spherical to elongated QD655 C1) common view of the lipodots; (C2–C5) Magnified images of the lipodots of similar magnification.Abbreviation: TeM, transmission electron microscope.
Figure 4 Oxidation kinetics of dihydrorhodamine123 by intact quantum dots QD655, lipodots, and in a mixture with empty liposomes (liposomes + QD655 incubated for 0 or 20 hours) during irradiation with 630 nm light.Abbreviations: QD, quantum dot; Dhr, dihydrorhodamine.
Figure 6 (decay of QD655 in different solutions. Fluorescence intensity is normalized to 1 at initial values.Abbreviations:A) Fluorescence spectra of QD655 in PBs and lipodots
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