Fig. 5

(a) SEM and (b) TEM micrographs of the N-CDs at 160 °C for 2 h. (c) Particle size distribution determined from the TEM micrograph.

(a) SEM and (b) TEM micrographs of the N-CDs at 160 °C for 2 h. (c) Particle size distribution determined from the TEM micrograph.