Fig. 8

(a) SEM and (b) TEM micrographs of the N-CDs at 210 °C for 4 h. (c) Particle size distribution determined from the TEM micrograph.

(a) SEM and (b) TEM micrographs of the N-CDs at 210 °C for 4 h. (c) Particle size distribution determined from the TEM micrograph.