Fig. 4: Fluorescence and SEM images of UCN@glass beads.
From: Heterogeneous photoredox flow chemistry for the scalable organosynthesis of fine chemicals
a Optical microscope image and b fluorescence image with scale of 1 mm. c SEM image (the red marking region is a man-made removal of carbon nitride to distinguish the surface of UCN and glass beads). d–g Element mapping images. Elements from top to bottom are Si, O, C, and N, respectively.
