By Raz Jelinek
This publication introduces many of the points of the rising box of carbon dots. Their structural and physico-chemical houses in addition to their present and destiny capability functions are coated. a different bankruptcy on graphene quantum dots is supplied. The reader also will locate various synthesis routes for carbon quantum dots.
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Additional info for Carbon Quantum Dots: Synthesis, Properties and Applications
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In principle, surface states of the Carbon-Dots were believed to play a critical role in generation of the excited electronic state, subsequently relaxing to a lower surface energy state through light emission. Interestingly, the shorter wavelength luminescence observed by the researchers in the same Carbon-Dot samples was ascribed to presumably greater energy separation of core energy levels of the Carbon-Dots (Fig. 16). This interpretation, however, is controversial since, as discussed in length above, Carbon-Dots luminescence has been ascribed mostly to surface states rather than the carbon cores.
7 and showing that modulation of the “surface states” of Carbon-Dots is the underlying source for the excitation-dependent luminescence properties. Indeed, as discussed above in Chap. 2 (Carbon-Dots Synthesis), early research in the Carbon-Dots ﬁeld has shown that luminescence could be achieved only after surface functionalization of the carbon nanoparticles through post-synthesis chemical reactions (also termed “surface passivation”). , no excitation-dependent luminescence) could be synthesized through careful modiﬁcation of the Carbon-Dots’ surface, thereby eliminating or reducing the concentrations of the “surface defects” responsible for the different energy levels.