The fluorescence of the DNRs/AuNCs and AuNCs showed a trend of first increasing and then decreasing over time.
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DNA Nanoribbon-Assisted Intracellular Biosynthesis of Fluorescent Gold Nanoclusters for Cancer Cell Imaging.
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The sentences
Unexpectedly, the intracellular gold content of both DNRs/AuNCs and AuNCs showed an increasing trend within the time frame of 48 h, while the fluorescence intensity decreased after 1.5 h of incubation, suggesting that the evacuation of AuNCs from the cells was not the reason for the decrease in fluorescence intensity.