Carbon Dots by Ya-Ping Sun

Author:Ya-Ping Sun
Language: eng
Format: epub
ISBN: 9783030411848
Publisher: Springer International Publishing

The functionalization of small carbon nanoparticles via the addition of organic radicals, for which the participation of the nanoparticles in radical copolymerization has provided strong corroborating evidence, may prove to be an extremely important finding in the continuing research and development of CDots.

6 Concluding Remarks

The two critical elements in the general definition of CDots are “carbon nanoparticles” and “passivation” of defects. For the classical synthesis based on pre-existing carbon nanoparticles, there are no major issues with the first. On the second among different passivation schemes, amidation chemistry has served the purpose of being simple and unambiguous for the functionalization, which coupled with de-functionalization provides a clear demonstration on the significance of passivation effects. Other modes of functionalization, especially the radical addition, offer some major advantages and should therefore be further developed.

CDots are characterized by their excellent optical and photoinduced redox properties, as emphasized in the chapter. Beyond that, however, CDots are also structurally flexible and versatile in terms of surface functionalities and conjugations with other species. There should be major opportunities in various combinations of all these characteristics.

The experimental results have been very consistent with the proposed/assumed mechanistic framework of CDots. However, the “physics” (quantum mechanistic elucidation) on why the passivated defects in the carbon nanomaterials would lead to the observed properties, including the details on structure–property correlations, remains an extremely important and apparently also extremely tough challenge. It might require new theoretical understandings in solid-state physics.

References Cited

Anilkumar, P., Wang, X., Cao, L., Sahu, S., Liu, J.-H., Wang, P., Korch, K., Tackett II, K.N., Parenzan, A., Sun, Y.-P.: Toward quantitatively fluorescent carbon-based “quantum” dots. Nanoscale. 3, 2023–2027 (2011)

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