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TEM micrographs of carbon quantum dots prepared from different organic precursors in a soft–hard template nanoreactor consisting of Pluronic P123 micelles and mesoporous silica. Carbon quantum dots were synthesized from: (A) 1,3,5-trimethylbenzene, (B) diaminebezene, (C) pyrene and (D) phenanthroline. The insets show the size distributions. Reproduced with permission from Ref. [69], copyright Royal Society of Chemistry, 2013.
