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  • Title: Synthesis and characterization of photoswitchable fluorescent SiO2 nanoparticles.
    Author: May F, Peter M, Hütten A, Prodi L, Mattay J.
    Journal: Chemistry; 2012 Jan 16; 18(3):814-21. PubMed ID: 22213584.
    Abstract:
    Switchable fluorescent silica nanoparticles have been prepared by covalently incorporating a fluorophore and a photochromic compound inside the particle core. The fluorescence can be switched reversibly between an on- and off-state via energy transfer. The particles were synthesized using different amounts of the photoswitchable compound (spiropyran) and the fluorophore (rhodamine B) in a size distribution between 98 and 140 nm and were characterized in terms of size, switching properties, and fluorescence efficiency by TEM, and UV\Vis and fluorescence spectroscopy.
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