Fig. 3From: Highly Selective Detection of Metronidazole by Self-Assembly via 0D/2D N–C QDs/g-C3N4 Nanocomposites Through FRET MechanismHRTEM images of a g-C3N4 nanosheets, b C QDs, c N–C QDs and d N–C QDs/g-C3N4 nanocompositesBack to article page