Fig. 7: Climatic aging of perovskites quantum dots tags.
From: Fluorescent nanoparticles for security tags against the looting of archaeological artefacts
Relative fluorescent intensities of perovskite security tags after aging. The bars show the percentage of fluorescence signal remaining after the aging process on the left axis. Markers show the initial fluorescence intensity measured by the spectrometer on the right axis in a logarithmic scale. Pictures show the Regalrez c-PRK and lg-PRK tags under UV lighting before and after aging as an example.
