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Anti‐Stokes fluorescence lifetime imaging in living cells was demonstrated by Rachel C. Evans et al. in their Research Article (e202308602). This was achieved through the design of ultra‐small nanoparticle probes based on triplet–triplet annihilation upconversion (TTA‐UC) chromophores encapsulated in an organic–inorganic ureasil host. Fluctuations of the UC lifetime in the stained cells suggest that...
Ein Quenching‐Dequenching‐Prozess von fluoreszenzmarkierten Nanopartikeln in biologischer Umgebung wird von Chun‐Xia Zhao und Mitarbeitern im Forschungsartikel auf S. 15554 vorgestellt. Mit Farbstoffmolekülen im festen Zustand führte die Freisetzung und/oder der Abbau der farbstoffmarkierten Nanopartikel in biologischer Umgebung aufgrund des Zustandswechsels zu einem mehrfachen Anstieg der Fluoreszenzintensität,...
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